CN107240908B - A kind of method and apparatus reducing influence of the compensator to route distance protection - Google Patents

Abstract

A kind of method that the embodiment of the present invention discloses influence of the reduction compensator to route distance protection, comprising: obtain the first voltage of the first electric current of inverter of connecting in the route or compensator of compensator access and the bus of compensator access or the route of compensator access；First electric current is greater than predetermined current threshold and the duration is greater than the first preset time threshold and exits series connection inverter and series transformer；First voltage is less than or equal to predetermined voltage threshold and the duration is greater than the setting of the second preset time threshold and connects inverter voltage as the first predeterminated voltage；Second electric current of the element of the first electric current meets the condition that the first electric current meets and exits series connection inverter and series transformer；The second voltage of first voltage corresponding line is greater than predetermined voltage threshold and the 4th duration was greater than third preset time threshold, cancels setting series connection inverter voltage and is the first predeterminated voltage and obtains the first electric current.The embodiment of the present invention discloses a kind of device of influence of the reduction compensator to route distance protection.

Description

A kind of method and apparatus reducing influence of the compensator to route distance protection

Technical field

It adjusts the distance the technology of the influence of protection circuit the present invention relates to the elimination in field of power system, more particularly to a kind of Reduce the method and apparatus of influence of the compensator to route distance protection.

Background technique

With the fast development of the interconnection technique of electric system, the electric system of long distance power transmission has obtained widely answering With.During remote Operation of Electric Systems, it is easy to be influenced by factors such as environment, workload demands, system shake occurs The problem of swinging, the performances such as system stability contorting performance, alternating current-direct current mixing electric network coordination, power flowcontrol ability caused to decline.It is existing Using static synchronous series compensator (Static Synchronous Series Compensator, SSSC), uniformly in technology Flow controller (Interline between flow controller (Unified Power Flow Controller, UPFC) and line Power Flow Controller, IPFC), the control devices such as convertible static compensator solve above-mentioned technical problem.

Currently, the access for static synchronous series compensator or UPFC influences aspect to harmonics in the prior art Document has: " THE UPFC and its influence to relay protection ", " THE UPFC and its shadow for protection of adjusting the distance Ring ", the adaptive distance protection of the route containing THE UPFC " study ", patent document has: application number CN201510732288.6 and a kind of entitled distance protecting method for the transmission line of electricity containing THE UPFC, Application number CN201610309848.1 and the entitled rapid distance protection method for power transmission line containing UPFC and device, application Number CN201510371762.7 and a kind of entitled electricity with THE UPFC transmission line of electricity based on pattern-recognition Flow transient direction protection method, application number CN201510371647.X and entitled a kind of with THE UPFC The method for protecting transient state energy of transmission line of electricity.

But above-mentioned existing literature mainly according to the working principle of SSSC, UPFC, IPFC or convertible static compensator and Characteristic optimizes the defencive function of the line protective device of route distance protection, but does not consider to work as electric system Response characteristic is protected in the control of the equipment such as SSSC, UPFC, IPFC or convertible static compensator when failure, affects route protection Equipment does not have engineering practicability to the distance protection performance of transmission line of electricity in electric system.

Summary of the invention

In order to solve the above technical problems, an embodiment of the present invention is intended to provide a kind of reduction compensators to route distance protection The method and apparatus of influence solve the problems, such as that the prior art has an impact the protective value of line protective device, it is ensured that line Road protects equipment to carry out the performance of distance protection to route, has ensured the safe and stable operation of electric system, ensure that engineering reality The property used.

In order to achieve the above objectives, the technical solution of the embodiment of the present invention is achieved in that

A method of reducing influence of the compensator to route distance protection, which comprises

The electric current for obtaining the series connection inverter in the route or compensator of compensator access, obtains the first electric current；Wherein, institute The electric current of route of the compensator for controlling compensator access is stated, the compensator includes static synchronous series compensator, uniformly Flow controller and convertible static compensator between flow controller, line；

The voltage for obtaining the bus of compensator access or the route of compensator access, obtains first voltage；

Compare the relationship between first electric current and predetermined current threshold；

Compare the relationship between the first voltage and predetermined voltage threshold；

If first electric current is greater than the predetermined current threshold, and the first duration was greater than the first preset time threshold Value, exits the series connection inverter and series transformer；Wherein, the series transformer is the equipment in the compensator, institute Stating for the first duration is the duration that first electric current is greater than the predetermined current threshold；

If the first voltage is less than or equal to the predetermined voltage threshold, and the second duration was greater than second and presets Time threshold, the output voltage that the series connection inverter is arranged is the first predeterminated voltage, and is obtained corresponding with first electric current Element electric current, obtain the second electric current；Wherein, second duration is described in the first voltage is less than or equal to The duration of predetermined voltage threshold；

If second electric current is greater than the predetermined current threshold, and the third duration is greater than first preset time Threshold value exits the series connection inverter and the series transformer；Wherein, the third duration is that second electric current is big In the duration of the predetermined current threshold；

If second electric current is less than or equal to the predetermined current threshold, if second electric current be greater than it is described Predetermined current threshold and the third duration are less than or equal to first preset time threshold, acquisition and described first The voltage of the corresponding route of voltage, obtains second voltage；

If the second voltage is greater than the predetermined voltage threshold, and the 4th duration was greater than third preset time threshold Value, the output voltage for cancelling the setting series connection inverter is first predeterminated voltage, and is executed in the acquisition compensator Series connection inverter or compensator access route electric current, obtain the first electric current；Wherein, the 4th duration is described Second voltage is greater than the duration of the predetermined voltage threshold.

It is optionally, described to exit the series connection inverter and the series transformer, comprising:

It is latched the series connection inverter, and triggers and is connected with the quick by-pass switch of the series transformer parallel connection；

It is closed the mechanical bypass switch in parallel with the series transformer.

It is optionally, described to exit after the series connection inverter and the series transformer, further includes:

When preset time arrives, the electric current and voltage of the route of the compensator access are obtained；

If the electric current of the route of compensator access is within the scope of predetermined current, and the route of compensator access Voltage enables the series connection inverter and the series transformer in the second predetermined voltage range.

Optionally, quick by-pass switch is in parallel with the series transformer, mechanical bypass switch and the series transformer Parallel connection, the method also includes:

When the mechanical bypass switch disconnects, transmission is executed instruction to the line protective device；Wherein, the execution I sections of distance protection that are used to indicate the route that the line protective device controls the compensator access are instructed to exit or update The distance protection impedance definite value of the route of the compensator access；

Timing after executing instruction described in the transmission after being spaced preset time period, obtains the line of the compensator access The electric current and voltage on road；

If the electric current of the route of compensator access is within the scope of predetermined current, and the route of compensator access Voltage enables the series connection inverter and the series transformer in the second predetermined voltage range；

When mechanical bypass switch closure, notification signal is sent to the line protective device；Wherein, the notice Signal is used to indicate I sections of distance protection of the route of the line protective device input compensation device access, or restores the benefit The distance protection impedance definite value for repaying the route of device access is to update the distance protection impedance definite value of the route of the compensator access Value before.

Optionally, the difference of the current phase angle of the route of the phase angle of first predeterminated voltage and compensator access Value is zero；

Alternatively, the difference of the voltage phase angle of the route of the phase angle of first predeterminated voltage and compensator access It is zero.

Optionally, first preset time threshold is less than at the first time；Wherein, the first time is that the route is protected Time needed for the I sections of progress analytical calculations of distance protection for the route that shield equipment accesses the compensator and the distance protection The sum of I sections protection act delay time；

Alternatively, first preset time threshold is less than the difference of the first time and the response time of quick by-pass switch Value.

A method of reducing influence of the compensator to route distance protection, which comprises

Receive executing instruction for the compensator transmission；

It is executed instruction described in response, I sections of distance protection for exiting the route of the compensator access；

Receive the notification signal that the compensator is sent；

The notification signal is responded, I sections of distance protection of the route of the compensator access are put into.

A method of reducing influence of the compensator to route distance protection, which comprises

Receive executing instruction for compensator transmission；

It is executed instruction described in response, obtain the distance protection impedance definite value of the route of compensator access and is set as the first resistance It is anti-；

The voltage and current of series connection inverter output is obtained, and calculate the voltage and current of the series connection inverter output Ratio obtains the second impedance；

First impedance is added with second impedance, obtains third impedance；

The third impedance is set by the distance protection impedance definite value for the route that the compensator accesses；

Receive the notification signal that the compensator is sent；

The notification signal is responded, and sets described for the distance protection impedance definite value for the route that the compensator accesses First impedance.

A method of reducing influence of the compensator to route distance protection, which comprises

Receive executing instruction for compensator transmission；

It is executed instruction described in response, obtain the distance protection impedance definite value of the route of compensator access and is set as the One impedance；

It is added first impedance to obtain the 4th impedance with the leakage reactance of series transformer；

The 4th impedance is set by the distance protection impedance definite value for the route that the compensator accesses；

Receive the notification signal that the compensator is sent；

The notification signal is responded, and sets described for the distance protection impedance definite value for the route that the compensator accesses First impedance.

A method of reducing influence of the compensator to route distance protection, which comprises

The series connection change of current when the route of compensator access works normally, in the route or compensator of detection compensator access The electric current of device obtains the first electric current, and detects the voltage of the bus of compensator access or the route of compensator access, obtains First voltage；

Compare the relationship between first electric current and predetermined current threshold；

If first electric current is greater than the predetermined current threshold, and the first duration was greater than the first preset time threshold Value, is latched the series connection inverter, and triggering is connected with the quick by-pass switch of the series transformer parallel connection, and closure with it is described The mechanical bypass switch of series transformer parallel connection；Wherein, first duration is that first electric current is greater than described preset The duration of current threshold；

Compare the relationship between the first voltage and predetermined voltage threshold；

If the first voltage is less than or equal to the predetermined voltage threshold, and the second duration was greater than second and presets Time threshold, the output voltage that the series connection inverter is arranged is the first predeterminated voltage, and is obtained corresponding with first electric current Element electric current, obtain the second electric current；Wherein, the electric current for the route that first predeterminated voltage is accessed with the compensator is same Phase, or with the compensator access route arc in phase, second duration be the first voltage be less than or Person is equal to the duration of the predetermined voltage threshold；

If second electric current is greater than the predetermined current threshold, and the third duration is greater than first preset time Threshold value is latched the series connection inverter, and triggering is connected with the quick by-pass switch of the series transformer parallel connection, and closure and institute State the mechanical bypass switch of series transformer parallel connection；Wherein, the third duration is second electric current greater than described pre- If the duration of current threshold；

If second electric current is less than or equal to the predetermined current threshold, if second electric current be greater than it is described Predetermined current threshold and the third duration are less than or equal to first preset time threshold, acquisition and described first The second voltage of the corresponding route of voltage；

If the second voltage is greater than the predetermined voltage threshold, and the 4th duration was greater than third preset time threshold Value, the output voltage for cancelling the setting series connection inverter is first predeterminated voltage, and is executed in the acquisition compensator Series connection inverter or compensator access route electric current, obtain the first electric current；Wherein, the 4th duration is described Second voltage is greater than the duration of the predetermined voltage threshold.

A kind of compensator, the compensator include: first acquisition unit, the first comparing unit, exit unit, the first processing Unit and the second processing unit；Wherein:

The first acquisition unit, for obtaining the electricity of the series connection inverter in the route or compensator that compensator accesses Stream, obtains the first electric current；Wherein, the compensator is used to control the electric current of the route of compensator access, and the compensator includes Flow controller and convertible static compensator between static synchronous series compensator, THE UPFC, line；

The first acquisition unit is also used to obtain the electricity of the bus of compensator access or the route of compensator access Pressure, obtains first voltage；

First comparing unit, for the relationship between first electric current and predetermined current threshold；

First comparing unit, for the relationship between the first voltage and predetermined voltage threshold；

It is described to exit unit, if being greater than the predetermined current threshold for first electric current, and the first duration is big In the first preset time threshold, the series connection inverter and series transformer are exited；Wherein, the series transformer is the benefit The equipment in device is repaid, first duration is the duration that first electric current is greater than the predetermined current threshold；

First comparing unit, for the relationship between the first voltage and predetermined voltage threshold；

The first processing units, if being less than or equal to the predetermined voltage threshold, and for the first voltage Two duration were greater than the second preset time threshold, and the output voltage that the series connection inverter is arranged is the first predeterminated voltage, and The electric current for obtaining element corresponding with first electric current, obtains the second electric current；Wherein, second duration is described One voltage is less than or equal to the duration of the predetermined voltage threshold；

It is described to exit unit, if being greater than the predetermined current threshold for second electric current, and the third duration is big In first preset time threshold, the series connection inverter and the series transformer are exited；Wherein, when the third continues Between be second electric current be greater than the predetermined current threshold duration；

The first acquisition unit, if second electric current is also used to less than or equal to the predetermined current threshold, or If person's second electric current is greater than the predetermined current threshold and the third duration is less than or equal to described first in advance If time threshold, the voltage of route corresponding with the first voltage is obtained, second voltage is obtained；

Described the second processing unit, if for the second voltage be greater than the predetermined voltage threshold, and the 4th continue when Between be greater than third preset time threshold, cancel setting it is described series connection inverter output voltage be first predeterminated voltage, and The electric current for executing the series connection inverter in the route or compensator of the acquisition compensator access, obtains the first electric current；Wherein, institute Stating for the 4th duration is the duration that the second voltage is greater than the predetermined voltage threshold.

Optionally, the unit that exits includes: first processing module and Second processing module；Wherein:

The first processing module for being latched the series connection inverter, and triggers in parallel with the series transformer Quick by-pass switch conducting；

The Second processing module, for being closed the mechanical bypass switch in parallel with the series transformer.

Optionally, described to exit after unit further include: second acquisition unit and third processing unit；Wherein:

The second acquisition unit, the electric current of the route for when preset time arrives, obtaining the compensator access And voltage；

The third processing unit, if for the compensator access route electric current within the scope of predetermined current, and The voltage of the route of the compensator access enables the series connection inverter and the series connection becomes in the second predetermined voltage range Depressor.

Optionally, quick by-pass switch is in parallel with the series transformer, mechanical bypass switch and the series transformer Parallel connection, the compensator further include: the first transmission unit, third acquiring unit and enabling unit；Wherein:

First transmission unit, for when the mechanical bypass switch disconnects, transmission to be executed instruction to the route Protect equipment；Wherein, described execute instruction is used to indicate the route that the line protective device controls compensator access The distance protection impedance definite value of I sections of the distance protection routes for exiting or updating compensator access；

The third acquiring unit obtains after being spaced preset time period for timing after executing instruction described in the transmission Take the electric current and voltage of the route of the compensator access；

The enabling unit, it is and described if the electric current of the route for compensator access is within the scope of predetermined current The voltage of the route of compensator access enables the series connection inverter and the series-transformer in the second predetermined voltage range Device；

First transmission unit is also used to send notification signal to the line when the mechanical bypass switch is closed Protect equipment in road；Wherein, the notification signal be used to indicate the route of line protective device input compensation device access away from I sections from protection, or restoring the distance protection impedance definite value of the route of the compensator access is to update the compensator access Route distance protection impedance definite value before value.

Optionally, the difference of the current phase angle of the route of the phase angle of first predeterminated voltage and compensator access Value is zero；

Alternatively, the difference of the voltage phase angle of the route of the phase angle of first predeterminated voltage and compensator access It is zero.

Optionally, first preset time threshold is less than at the first time；Wherein, the first time is that the route is protected Time needed for the I sections of progress analytical calculations of distance protection for the route that shield equipment accesses the compensator and the distance protection The sum of I sections protection act delay time；

Alternatively, first preset time threshold is less than the difference of the first time and the response time of quick by-pass switch Value.

A kind of line protective device, the equipment include: the first receiving unit and fourth processing unit；Wherein:

First receiving unit, for receiving executing instruction for compensator transmission；

The fourth processing unit, for respond it is described execute instruction, exit the distance of the route of the compensator access I sections of protection；

First receiving unit is also used to receive the notification signal that the compensator is sent；

The fourth processing unit is also used to respond the notification signal, put into the route of compensator access away from I sections from protection.

A kind of line protective device, the equipment include: the second receiving unit, the 5th processing unit, the 6th processing unit, First computing unit and the first setting unit；Wherein:

Second receiving unit, for receiving executing instruction for compensator transmission；

5th processing unit, for respond it is described execute instruction, obtain the distance of the route of the compensator access Protection impedance definite value is simultaneously set as the first impedance；

6th processing unit for obtaining the voltage and current of series connection inverter output, and calculates the series connection and changes The ratio of the voltage and current of stream device output obtains the second impedance；

First computing unit obtains third impedance for first impedance to be added with second impedance；

The distance protection impedance definite value of first setting unit, the route for accessing the compensator is set as institute State third impedance；

Second receiving unit is also used to receive the notification signal that the compensator is sent；

5th processing unit, is also used to respond the notification signal, and the route that the compensator is accessed away from First impedance is set as from protection impedance definite value.

A kind of line protective device, the equipment include: third receiving unit, the 7th processing unit, the second computing unit With the second setting unit；Wherein:

The third receiving unit, for receiving executing instruction for compensator transmission；

7th processing unit, for respond it is described execute instruction, obtain the distance protection of the route of compensator access Impedance definite value is simultaneously set as the first impedance；

Second computing unit obtains the 4th resistance for first impedance to be added with the leakage reactance of series transformer It is anti-；

The distance protection impedance definite value of second setting unit, the route for accessing the compensator is set as institute State the 4th impedance；

The third receiving unit is also used to receive the notification signal that the compensator is sent；

7th processing unit, is also used to respond the notification signal, and the route that the compensator is accessed away from First impedance is set as from protection impedance definite value.

A kind of compensator, the compensator include: detection unit, the second comparing unit, the 8th processing unit, the 9th processing Unit and the 4th acquiring unit；Wherein:

The detection unit, when route for accessing when compensator works normally, the route of detection compensator access or In compensator series connection inverter electric current, obtain the first electric current, and detect compensator access bus or the compensator connect The voltage of the route entered, obtains first voltage；

Second comparing unit, for the relationship between first electric current and predetermined current threshold；

8th processing unit, if for first electric current be greater than the predetermined current threshold, and first continue when Between be greater than the first preset time threshold, be latched the series connection inverter, trigger the quick bypass in parallel with the series transformer Switch conduction, and it is closed the mechanical bypass switch in parallel with the series transformer；Wherein, first duration is described First electric current is greater than the duration of the predetermined current threshold；

Second comparing unit, the relationship being also used between first voltage and predetermined voltage threshold described in comparison；

9th processing unit, if being less than or equal to the predetermined voltage threshold, and for the first voltage Two duration were greater than the second preset time threshold, and the output voltage that the series connection inverter is arranged is the first predeterminated voltage, and The electric current for obtaining element corresponding with first electric current, obtains the second electric current；Wherein, first predeterminated voltage and the benefit Repay device access route current in phase, or with the compensator access route arc in phase, described second continue when Between be the first voltage be less than or equal to the predetermined voltage threshold duration；

8th processing unit, if being also used to second electric current greater than the predetermined current threshold, and third continues Time is greater than first preset time threshold, is latched the series connection inverter, triggers in parallel with the series transformer fast Fast by-pass switch conducting, and it is closed the mechanical bypass switch in parallel with the series transformer；Wherein, the third duration It is the duration that second electric current is greater than the predetermined current threshold；

4th acquiring unit, if second electric current is also used to less than or equal to the predetermined current threshold, or If person's second electric current is greater than the predetermined current threshold and the third duration is less than or equal to described first in advance If time threshold, the second voltage of route corresponding with the first voltage is obtained；

9th processing unit, if being also used to the second voltage greater than the predetermined voltage threshold, and the 4th continues Time is greater than third preset time threshold, and the output voltage for cancelling the setting series connection inverter is first predeterminated voltage, And the electric current of the series connection inverter in the acquisition compensator or the route of compensator access is executed, obtain the first electric current；Wherein, 4th duration is the duration that the second voltage is greater than the predetermined voltage threshold.

The method and apparatus for reducing influence of the compensator to route distance protection provided by the embodiment of the present invention, obtain The electric current of series connection inverter in the route or compensator of compensator access obtains the first electric current, obtains the bus of compensator access Or the voltage of route of compensator access obtains first voltage, is greater than predetermined current threshold in the first electric current, and first when continuing Between be greater than the first preset time threshold, exit series connection inverter and series transformer, be less than or equal in first voltage default Voltage threshold, and the second duration be greater than the second preset time threshold when, setting series connection inverter output voltage be first Predeterminated voltage, and the electric current for obtaining element corresponding with the first electric current obtains the second electric current, is greater than predetermined current in the second electric current When threshold value and third duration are greater than the first preset time threshold, series connection inverter and series transformer are exited, otherwise second Electric current is unsatisfactory for obtaining the voltage of the corresponding route of first voltage when above-mentioned condition, obtains second voltage, is greater than in second voltage When predetermined voltage threshold and the 4th duration are greater than third preset time threshold, cancel the output voltage of setting series connection inverter For the first predeterminated voltage, and the electric current for obtaining the route of series connection inverter or compensator access in compensator is executed, obtains the One electric current；In this way, in line protective device work, when the series connection inverter or compensator of the compensator that electric system uses connect The electric current of the route entered meets preset condition, or series connection inverter or the compensator access of the compensator used when electric system The electric current of route be unsatisfactory for preset condition, when the voltage of the route of series connection inverter or the compensator access of compensator meet it is pre- If condition, series connection inverter and the series transformer in compensator are exited, so that series connection inverter and series transformer is not worked, subtracts Influence of the operation characteristic of small series connection inverter and series transformer to line protective device, convenient for the string in control compensator The working condition for joining inverter and series transformer, solves the prior art and has an impact to the defencive function of line protective device The problem of, it is ensured that line protective device carries out the performance of distance protection to route, has ensured the safe and stable operation of electric system, It ensure that engineering practicability.

Detailed description of the invention

Fig. 1 is a kind of process of the method for influence of the reduction compensator provided in an embodiment of the present invention to route distance protection Schematic diagram；

Fig. 2 is the stream of the method for influence of another reduction compensator provided in an embodiment of the present invention to route distance protection Journey schematic diagram；

Fig. 3 is the stream of the method for another influence of the reduction compensator to route distance protection provided in an embodiment of the present invention Journey schematic diagram；

Fig. 4 is the stream of the method for another influence of the reduction compensator to route distance protection provided in an embodiment of the present invention Journey schematic diagram；

Fig. 5 be another embodiment of the present invention provides a kind of influence of reduction compensator to route distance protection method Flow diagram；

Fig. 6 is a kind of structural schematic diagram of UPFC provided in an embodiment of the present invention；

Fig. 7 is a kind of circuit equivalent figure of the structural schematic diagram of UPFC provided in an embodiment of the present invention；

Fig. 8 is a kind of structural schematic diagram of compensator provided in an embodiment of the present invention；

Fig. 9 is the structural schematic diagram of another compensator provided in an embodiment of the present invention；

Figure 10 is a kind of structural schematic diagram of line protective device provided in an embodiment of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description.

The embodiment of the present invention provides a kind of method of influence of the reduction compensator to route distance protection, referring to Fig.1 shown in, Method includes the following steps:

The electric current for the series connection inverter in route or compensator that step 101, acquisition compensator access, obtains the first electricity Stream.

Wherein, compensator is used to control the electric current of the route of compensator access, and compensator includes Static Synchronous Series compensation Flow controller and convertible static compensator between device, THE UPFC, line.

Specifically, step 101 obtains the electric current of the series connection inverter in device to be compensated or the route of compensator access, obtain First electric current can be realized by compensator.Compensator can be between static synchronous series compensator, THE UPFC, line The equipment such as flow controller and convertible static compensator.

The present embodiment is the route failure in compensator access, line protective device (such as protective relaying device) need pair The route of compensator access carries out proposition when relay protection operation；And obtaining series connection inverter or compensation in compensator Before the electric current of the route of device access, when the route of compensator access works normally, compensator can be to the series connection in compensator The voltage of the route of the electric current of inverter or the route of compensator access, the bus of compensator access or compensator access carries out real When monitor, can find in time in this way compensator access route whether break down.

The voltage of the route of step 102, the bus for obtaining compensator access or compensator access, obtains first voltage.

Specifically, step 102 obtains the voltage of the bus of compensator access or the route of compensator access, the first electricity is obtained Pressure can be realized by compensator.

Step 103 compares relationship between the first electric current and predetermined current threshold.

Specifically, step 103 compares the relationship between the first electric current and predetermined current threshold can be realized by compensator. Wherein, predetermined current threshold, which can be, carries out actual measurement to the overcurrent that electric system is able to bear and analyzes one obtained A current value, or carry out the obtained current value of theory analysis or actual measurement analysis and theory analysis is combined and obtained Current value.It should be noted that predetermined current threshold can be changed as the case may be.

If step 104, the first electric current are greater than predetermined current threshold, and the first duration was greater than the first preset time threshold Value exits series connection inverter and series transformer.

Wherein, series transformer is the equipment in compensator；First duration was that the first electric current is greater than predetermined current threshold The duration of value.

If specifically, first electric current of step 104 be greater than predetermined current threshold, and the first duration be greater than first it is default when Between threshold value, exit series connection inverter and series transformer can be realized by compensator.First preset time threshold can be pair When electric current in compensator is greater than predetermined current threshold, the duration that can be worked normally measures one that analysis obtains Time value, or carry out the obtained time value of theory analysis, or combine actual measurement and it is theoretical analyzed when Between be worth.

Step 105 compares relationship between first voltage and predetermined voltage threshold.

Specifically, step 105 compares the relationship between first voltage and predetermined voltage threshold can be realized by compensator. Predetermined voltage threshold can be the voltage value for carrying out theory analysis acquisition, can also be a large amount of actual conditions measurements and theory analysis The voltage value of acquisition can as the case may be modified predetermined voltage threshold.

If step 106, first voltage are less than or equal to predetermined voltage threshold, and the second duration was greater than second and presets The output voltage of time threshold, setting series connection inverter is the first predeterminated voltage, and obtains element corresponding with the first electric current Electric current obtains the second electric current.

Wherein, the second duration was the duration that first voltage is less than or equal to predetermined voltage threshold.

If specifically, step 106 first voltage is less than or equal to predetermined voltage threshold, and the second duration was greater than the The output voltage of two preset time thresholds, setting series connection inverter is the first predeterminated voltage, and is obtained corresponding with the first electric current The electric current of element, obtaining the second electric current can be realized by compensator.Wherein, the phase angle of the first predeterminated voltage connects with compensator The voltage of the route entered or the phase angle of electric current can be identical, the route of the phase angle of the first predeterminated voltage and compensator access Difference between voltage or the phase angle of electric current can also be within the scope of 90 degree.First predeterminated voltage can be carry out many experiments The voltage value of acquisition is also possible to the voltage value analyzed based on theory, can also be based on actual use situation pair The voltage value of acquisition carries out the voltage correction value that continuous correction obtains.

Be less than or equal to predetermined current threshold in the first electric current, if the first electric current be greater than predetermined current threshold and the One duration be less than or equal to the first preset time threshold when, if first voltage be less than or equal to predetermined voltage threshold and Second duration was greater than the second preset time threshold, and the output voltage of setting series connection inverter is the first predeterminated voltage, due to The phase angle of first predeterminated voltage and compensator access the voltage of route or the phase angle of electric current between difference be less than or Equal to 90 degree, it is equivalent to has accessed a positive impedance in this way, it being capable of the effectively series connection inverter in smaller compensator and series connection Influence of the transformer to line protective device.If the voltage of the route of the bus or compensator access of the compensator access obtained, Obtained first voltage is greater than predetermined voltage threshold, repeats selection and executes step 101~109, the in this way line when compensator access When road is broken down again, series connection inverter and the series transformer in compensator can be exited, the defeated of series connection inverter is set Voltage is the first predeterminated voltage out, inhibits influence of the compensator to line protective device.Second preset time threshold can be logical The time value that actual measurement is analyzed is crossed, or carries out the time value that theory analysis obtains, or combines practical survey Amount and the theoretical time value analyzed.

Wherein, if step 106 first voltage is less than or equal to predetermined voltage threshold, and the second duration was greater than second The output voltage of preset time threshold, setting series connection inverter is the first predeterminated voltage, and obtains member corresponding with the first electric current The electric current of part can choose execution step 107~108 or step 109 after obtaining the second electric current, preset if the second electric current is greater than Current threshold, and the third duration is greater than the selection of the first preset time threshold and executes step 107~108, if second voltage is big In predetermined voltage threshold, and the 4th duration was greater than the selection of third preset time threshold and executes step 109；

If step 107, the second electric current are greater than predetermined current threshold, and the third duration is greater than the first preset time threshold Value exits series connection inverter and series transformer.

Wherein, the third duration is the duration that the second electric current is greater than predetermined current threshold.

If specifically, second electric current of step 107 be greater than predetermined current threshold, and the third duration be greater than first it is default when Between threshold value, exit series connection inverter and series transformer can be realized by compensator.

If step 108, the second electric current be less than or equal to predetermined current threshold, if the second electric current be greater than predetermined current Threshold value and third duration are less than or equal to the first preset time threshold, the electricity of acquisition route corresponding with first voltage Pressure, obtains second voltage.

Specifically, if second electric current of step 108 is less than or equal to predetermined current threshold, if the second electric current be greater than it is pre- If current threshold and third duration are less than or equal to the first preset time threshold, acquisition route corresponding with first voltage Voltage, obtaining second voltage can be realized by compensator.

If step 109, second voltage are greater than predetermined voltage threshold, and the 4th duration was greater than third preset time threshold Value, the output voltage for cancelling setting series connection inverter is the first predeterminated voltage, and executes the series connection inverter obtained in compensator Or the electric current of the route of compensator access, obtain the first electric current.

Wherein, the 4th duration was the duration that second voltage is greater than predetermined voltage threshold.

Specifically, if step 109 second voltage is greater than predetermined voltage threshold, and when the 4th duration preset greater than third Between threshold value, cancel setting series connection inverter output voltage be the first predeterminated voltage, and execute obtain compensator in series connection change The electric current of the route of device or compensator access is flowed, obtaining the first electric current can be realized by compensator.Third preset time threshold It can be the time value analyzed by actual measurement, or carry out the time value that theory analysis obtains, or knot Close actual measurement and the theoretical time value analyzed.When second voltage be greater than predetermined voltage threshold, and the 4th continue when Between be greater than third preset time threshold when, cancel setting series connection inverter output voltage be the first predeterminated voltage, i.e., no longer control The output voltage of system series connection inverter is that the output voltage of setting series connection inverter is the first predeterminated voltage, makes its output voltage The voltage that should currently export, and repeat corresponding operation in step 101-109, in this way when the route of compensator access again When secondary failure, series connection inverter and the series transformer in compensator, the output electricity of setting series connection inverter can be exited Pressure is the first predeterminated voltage, reduces influence of the compensator to line protective device.

It is further it should be noted that, execution sequence between step 103-104 and step 105-109 without successively it Point, step 103-104 can choose with step 105-109 and be performed simultaneously.

It should be noted that the first preset time threshold, the second preset time threshold and third preset time threshold can phases Together, it can also be different, concrete condition can be determined by actual use situation.

The method for reducing influence of the compensator to route distance protection provided by the embodiment of the present invention obtains compensator and connects The electric current of series connection inverter in the route or compensator entered obtains the first electric current, obtains the bus or compensator of compensator access The voltage of the route of access obtains first voltage, is greater than predetermined current threshold in the first electric current, and the first duration was greater than the One preset time threshold exits series connection inverter and series transformer, is less than or equal to predetermined voltage threshold in first voltage, And second the duration be greater than the second preset time threshold when, setting series connection inverter output voltage be the first predeterminated voltage, And the electric current for obtaining element corresponding with the first electric current obtains the second electric current, is greater than predetermined current threshold and third in the second electric current When duration is greater than the first preset time threshold, series connection inverter and series transformer are exited, otherwise the second electric current is unsatisfactory for The voltage that first voltage corresponding route is obtained when above-mentioned condition, obtains second voltage, is greater than predeterminated voltage threshold in second voltage Value and when the 4th duration was greater than third preset time threshold, the output voltage for cancelling setting series connection inverter is first default Voltage, and the electric current for obtaining the route of series connection inverter or compensator access in compensator is executed, obtain the first electric current；This Sample, in line protective device work, when the route of series connection inverter or the compensator access for the compensator that electric system uses Electric current meet preset condition, or the compensator used when electric system series connection inverter or compensator access route Electric current is unsatisfactory for preset condition, when the voltage of route that the series connection inverter or compensator of compensator access meets preset condition, Series connection inverter and the series transformer in compensator are exited, so that series connection inverter and series transformer is not worked, reduces string Join influence of the operation characteristic of inverter and series transformer to line protective device, convenient for the series connection change of current in control compensator The working condition of device and series transformer solves the prior art and asks what the defencive function of line protective device had an impact Topic, it is ensured that line protective device carries out the performance of distance protection to route, has ensured the safe and stable operation of electric system, guarantees Engineering practicability.

The embodiment of the present invention provides a kind of method of influence of the reduction compensator to route distance protection, referring to shown in Fig. 2, Method includes the following steps:

Step 201, compensator obtain the electric current of the series connection inverter in the route or compensator of compensator access, obtain the One electric current.

Wherein, compensator is used to control the electric current of the route of compensator access, and compensator includes Static Synchronous Series compensation Flow controller and convertible static compensator between device, THE UPFC, line.

Specifically, the electric current that compensator obtains can be alternating current, the voltage of acquisition can be alternating voltage.With compensation Device is UPFC, the electric current of acquisition be the series connection inverter in UPFC alternating current for be illustrated, when the electricity of UPFC control When force transmission system works normally perhaps failure when available UPFC in series connection inverter alternating current or compensator The alternating current of the route of access obtains the first electric current.

Step 202, compensator obtain the voltage of the bus of compensator access or the route of compensator access, obtain the first electricity Pressure.

Specifically, being illustrated so that the voltage that compensator obtains is the alternating voltage of the bus of UPFC access as an example, obtain The alternating voltage of the bus of UPFC access is that first voltage is analyzed.

Step 203, compensator compare the relationship between the first electric current and predetermined current threshold.

Specifically, the corresponding predetermined current threshold of alternating current of series connection inverter and exchanging for the route that accesses of compensator The corresponding predetermined current threshold of electric current may be the same or different, and concrete condition is determines according to actual conditions.When UPFC is controlled Electric system break down when, compensator compare in UPFC series connection inverter electric current and predetermined current threshold between it is big Small relationship.

If step 204, the first electric current are greater than predetermined current threshold, and the first duration was greater than the first preset time threshold Value, compensator locking series connection inverter, and trigger and be connected with the quick by-pass switch of series transformer parallel connection.

Wherein, the first duration was the duration that the first electric current is greater than predetermined current threshold；First preset time threshold Value is less than at the first time, and when being line protective device work at the first time, compensator protects the distance for the route that compensator accesses I sections of shield carries out the sum of the delay time of the time needed for influencing to inhibit with distance protection I sections；Alternatively, the first preset time threshold Less than the difference of first time and the response time of quick by-pass switch.

Specifically, the alternating current of the series connection inverter in UPFC is greater than predetermined current threshold, and the first duration When greater than the first preset time threshold, compensator locking series connection inverter, and trigger the quick bypass in parallel with series transformer Switch conduction can be realized the function of overcurrent protection protection.

Step 205, compensator are closed the mechanical bypass switch in parallel with series transformer.

Specifically, if the alternating current of the series connection inverter in UPFC is greater than predetermined current threshold, and the series connection in UPFC The duration that the alternating current of inverter is greater than predetermined current threshold is greater than the first preset time threshold, compensator locking series connection Inverter, and trigger and be connected with the quick by-pass switch of series transformer parallel connection, compensator is closed mechanical bypass switch, also can Realize the function of overcurrent protection protection.

Wherein, step 205 may be performed simultaneously with step 204, then the precondition that step 206 executes is and series-transformer The state of the mechanical bypass switch of device parallel connection is closed state；

Step 206, when preset time arrive when, compensator obtain compensator access route electric current and voltage.

Specifically, preset time can be a period, it is also possible to the also following time point, it can be according to reality Line protective device is executed in the situation of border carry out the corresponding protection act of route protection function with it the time required to or theoretical divide It analyses obtained time value to be set, such as can be 5 minutes etc.；Become in the series connection inverter and series connection exited in UPFC After depressor, when preset time arrives, the alternating current and alternating voltage of the route of the compensator access in UPFC are obtained, wherein Preset time can be what user set according to specific troubleshooting scenario, not do any restriction.

If the electric current of the route of step 207, compensator access is within the scope of predetermined current, and the route of compensator access For voltage in the second predetermined voltage range, compensator enables series connection inverter and series transformer.

Specifically, the second predeterminated voltage can be the voltage value analyzed by actual measurement, or managed By the voltage value that analysis obtains, or combine actual measurement and the theoretical voltage value analyzed.Enable the series connection change of current Device can realize that enabling series transformer can be by disconnecting the machine in parallel with series transformer by unlock series connection inverter Tool by-pass switch realizes, in practical engineering applications, after mechanical bypass switch closure, the quick by-pass switch of conducting can be from Dynamic locking.

Step 208, compensator compare the relationship between first voltage and predetermined voltage threshold.

It is exchanged specifically, the alternating voltage of the bus of UPFC access corresponds to predetermined voltage threshold with line attachment in UPFC The corresponding predetermined voltage threshold of voltage may be the same or different, and concrete condition can be determined according to actual use situation.

If step 209, first voltage are less than or equal to predetermined voltage threshold, and the second duration was greater than second and presets The output voltage of time threshold, compensator setting series connection inverter is the first predeterminated voltage, and is obtained corresponding with the first electric current The electric current of element obtains the second electric current.

Wherein, the difference of the current phase angle of the route of the phase angle of the first predeterminated voltage and compensator access is zero；Or The difference of the voltage phase angle of the route of person, the phase angle of the first predeterminated voltage and compensator access is zero；Second duration It is the duration that first voltage is less than or equal to predetermined voltage threshold.

Specifically, if first voltage is greater than predetermined voltage threshold or first voltage is less than or equal to predeterminated voltage threshold It is worth and the second duration is less than the second preset time threshold, compensator repeats step 201-213, in this way when compensator connects When the route entered breaks down again, series connection inverter and the series transformer in compensator can be exited, and when default Between when arriving, reactivate series connection inverter and the series transformer in compensator, to the trend of the route of compensator access into Row control.

Wherein, if step 209 first voltage is less than or equal to predetermined voltage threshold, and the second duration was greater than second The output voltage of preset time threshold, compensator setting series connection inverter is the first predeterminated voltage, and is obtained and the first electric current pair The electric current for the element answered obtains the second electric current, can choose and executes step 210~213 or step 214~215, if the second electricity Stream is greater than predetermined current threshold, and the third duration is greater than the selection of the first preset time threshold and executes step 210~213, if Second electric current be less than or equal to predetermined current threshold, if the second electric current be greater than predetermined current threshold and third duration It selects to execute step 214~215 less than or equal to the first preset time threshold；

If step 210, the second electric current are greater than predetermined current threshold, and the third duration is greater than the first preset time threshold Value, compensator locking series connection inverter, and trigger and be connected with the quick by-pass switch of series transformer parallel connection.

Wherein, the third duration is the duration that the second electric current is greater than predetermined current threshold.

Step 211, compensator are closed the mechanical bypass switch in parallel with series transformer.

Wherein, step 210 may be performed simultaneously with step 211, then the precondition that step 212 executes is and series-transformer The state of the mechanical bypass switch of device parallel connection is closed state；

Step 212, when preset time arrive when, compensator obtain compensator access route electric current and voltage.

If the electric current of the route of step 213, compensator access is within the scope of predetermined current, and the route of compensator access For voltage in the second predetermined voltage range, compensator enables series connection inverter and series transformer.

If step 214, the second electric current be less than or equal to predetermined current threshold, if the second electric current be greater than predetermined current Threshold value and third duration are less than or equal to the first preset time threshold, and compensator obtains route corresponding with first voltage Voltage, obtain second voltage.

If step 215, second voltage are greater than predetermined voltage threshold, and the 4th duration was greater than third preset time threshold Value, the output voltage that compensator cancels setting series connection inverter is the first predeterminated voltage, and executes the series connection obtained in compensator The electric current of inverter or the route of compensator access, obtains the first electric current.

Wherein, the 4th duration was the duration that second voltage is greater than predetermined voltage threshold.

Specifically, if second voltage be less than or equal to predetermined voltage threshold, if second voltage be greater than predeterminated voltage Threshold value and the 4th duration are less than or equal to third preset time threshold, the output electricity of the series connection inverter in holding UPFC Pressure is the first predeterminated voltage.

Further it should be noted that, the execution sequence between step 203-207 and step 208-215 is divided without successive, Step 203-207 may be performed simultaneously with step 208-215.

It should be noted that the explanation in the present embodiment with same steps in other embodiments or concept, is referred to Description in other embodiments, details are not described herein again.

The method for reducing influence of the compensator to route distance protection provided by the embodiment of the present invention obtains compensator and connects The electric current of series connection inverter in the route or compensator entered obtains the first electric current, obtains the bus or compensator of compensator access The voltage of the route of access obtains first voltage, is greater than predetermined current threshold in the first electric current, and the first duration was greater than the One preset time threshold exits series connection inverter and series transformer, is less than or equal to predetermined voltage threshold in first voltage, And second the duration be greater than the second preset time threshold when, setting series connection inverter output voltage be the first predeterminated voltage, And the electric current for obtaining element corresponding with the first electric current obtains the second electric current, is greater than predetermined current threshold and third in the second electric current When duration is greater than the first preset time threshold, series connection inverter and series transformer are exited, otherwise the second electric current is unsatisfactory for The voltage that first voltage corresponding route is obtained when above-mentioned condition, obtains second voltage, is greater than predeterminated voltage threshold in second voltage Value and when the 4th duration was greater than third preset time threshold, the output voltage for cancelling setting series connection inverter is first default Voltage, and the electric current for obtaining the route of series connection inverter or compensator access in compensator is executed, obtain the first electric current；This Sample, in line protective device work, when the route of series connection inverter or the compensator access for the compensator that electric system uses Electric current meet preset condition, or the compensator used when electric system series connection inverter or compensator access route Electric current is unsatisfactory for preset condition, when the voltage of route that the series connection inverter or compensator of compensator access meets preset condition, Series connection inverter and the series transformer in compensator are exited, so that series connection inverter and series transformer is not worked, reduces string Join influence of the operation characteristic of inverter and series transformer to line protective device, convenient for the series connection change of current in control compensator The working condition of device and series transformer solves the prior art and asks what the defencive function of line protective device had an impact Topic, it is ensured that line protective device carries out the performance of distance protection to route, has ensured the safe and stable operation of electric system, guarantees Engineering practicability.

The embodiment of the present invention provides a kind of method of influence of the reduction compensator to route distance protection, referring to shown in Fig. 3, Method includes the following steps:

Step 301, compensator obtain the electric current of the series connection inverter in the route or compensator of compensator access, obtain the One electric current.

Wherein, the device for reducing influence of the compensator to route distance protection can be compensator, and compensator is for controlling The electric current of the route of compensator access, compensator includes trend control between static synchronous series compensator, THE UPFC, line Device processed and convertible static compensator.

Step 302, compensator obtain the voltage of the bus of compensator access or the route of compensator access, obtain the first electricity Pressure.

It should be noted that the execution sequence between step 301 and step 302 is without successive point, step 301 and step 302 may be performed simultaneously.

Step 303, compensator transmission are executed instruction to line protective device.

Wherein, I sections of distance protection for executing instruction the route for being used to indicate line protective device control compensator access move back Out or update compensator access route distance protection impedance definite value.

Specifically, the device for reducing influence of the compensator to route distance protection can be line protective device, route is protected Shield equipment can be the protection equipment such as protective relaying device.It can establish communication process between compensator and line protective device, When the mechanical bypass switch in parallel with series transformer disconnects, transmission is executed instruction to line protective device, announcement trunk protection Equipment updates the distance protection definite value of the route of compensator access, and executes corresponding protection operation.

Step 304, line protective device receive executing instruction for compensator transmission.

It should be noted that step 304 line protective device receive compensator send execute instruction after, route protection is set Standby can choose executes step 305, or can choose in other embodiments of the present invention as shown in Figure 4 execute step 306~ 309, or selection can also be can choose in other embodiments of the present invention as shown in Figure 5 and execute step 310~312；

Step 305, line protective device response execute instruction, I sections of distance protection for exiting the route of compensator access.

Step 306, line protective device response execute instruction, and the distance protection impedance for obtaining the route of compensator access is fixed It is worth and is set as the first impedance.

Step 307, line protective device obtain the voltage and current of series connection inverter output, and it is defeated to calculate series connection inverter The ratio of voltage and current out obtains the second impedance.

First impedance is added by step 308, line protective device with the second impedance, obtains third impedance.

The distance protection impedance definite value for the route that compensator accesses is set third resistance by step 309, line protective device It is anti-.

Step 310, line protective device response execute instruction, and the distance protection impedance for obtaining the route of compensator access is fixed It is worth and is set as the first impedance.

Specifically, the first resistance value is assigned to the distance protection impedance definite value of the route of compensator access, in such manner, it is possible into The influence when route for one step compensator being inhibited to access line protective device to compensator is protected.

First impedance is added to obtain the 4th impedance with the leakage reactance of series transformer by step 311, line protective device.

Specifically, specifically, the leakage reactance of series transformer can operation instructions from series transformer or series connection It is obtained in the nameplate of transformer.

The distance protection impedance definite value for the route that compensator accesses is set the 4th resistance by step 312, line protective device It is anti-.

Step 313, compensator compare the relationship between the first electric current and predetermined current threshold.

If step 314, the first electric current be greater than predetermined current threshold, and the first electric current be greater than predetermined current threshold it is lasting when Between be greater than the first preset time threshold, compensator locking series connection inverter, and trigger the quick bypass in parallel with series transformer Switch conduction.

Wherein, series transformer is the equipment in compensator, and the first duration was that the first electric current is greater than predetermined current threshold The duration of value, the first preset time threshold are less than first time, are the line of circuit compensation device access to be protected at the first time The time of I sections of distance protection of the adaptive setting on road and distance protection I sections of the sum of delay time；Alternatively, the first preset time Threshold value is less than the difference with the response time of quick by-pass switch at the first time.

Step 315, compensator are closed the mechanical bypass switch in parallel with series transformer.

Wherein, the execution sequence between step 315 and step 314 is without successive point, and step 315 and step 314 can be with It is performed simultaneously.

It should be noted that can be line protective device between step 304~312 and step 313~315 and compensator is same Shi Zhihang's.

Step 316, compensator after transmission executes instruction timing, be spaced preset time period after, obtain compensator connect The electric current and voltage of the route entered.

If the electric current of the route of step 317, compensator access is within the scope of predetermined current, and the route of compensator access For voltage in the second predetermined voltage range, compensator enables series connection inverter and series transformer.

Step 318, after mechanical bypass switch closure in parallel with series transformer, compensator sends notification signal to line Protect equipment in road.

Wherein, notification signal is used to indicate I sections of distance protection of the route of line protective device input compensation device access, or The distance protection impedance definite value of the route of person's restoration and compensation device access is to update the distance protection impedance of the route of compensator access Value before definite value.

It should be noted that the operation order between step 316-317 and step 318 does not have successive point, step 316-317 It can execute, or can be operated simultaneously with step 318 after step 318, specific implementation procedure can be according to reality The application scenarios on border determine；

Step 319, line protective device receive the notification signal that compensator is sent.

It should be noted that if selection executes step 305, line protective device after line protective device executes step 304 It can choose execution step 320 after executing step 319, it is specific as shown in Figure 3；If line protective device selects after executing step 304 It selects and executes step 306~309, then line protective device can choose execution step 321 after executing step 319, specifically such as Fig. 4 institute Show；If line protective device executes selection execution step 310~312 after step 304, line protective device execution step It can choose after 319 and execute step 321, it is specific as shown in Figure 5；

Step 320, line protective device response notification signal, I sections of distance protection of the route of input compensation device access.

Step 321, compensator respond notification signal, and the distance protection impedance definite value of the route of compensator access is arranged For the first impedance.

Step 322, compensator compare the relationship between first voltage and predetermined voltage threshold.

If step 323, first voltage are less than or equal to predetermined voltage threshold, and the second duration was greater than second and presets The output voltage of time threshold, compensator setting series connection inverter is the first predeterminated voltage, and is obtained corresponding with the first electric current The electric current of element obtains the second electric current.

Wherein, the second duration was the duration that first voltage is less than or equal to predetermined voltage threshold.

If step 324, the second electric current are greater than predetermined current threshold, and the third duration is greater than the first preset time threshold Value, compensator locking series connection inverter, and trigger and be connected with the quick by-pass switch of series transformer parallel connection.

Step 325, compensator are closed the mechanical bypass switch in parallel with series transformer.

Wherein, after executing step 325, it can choose and execute step 316~320 as shown in figure 3, it is also an option that executing step Rapid 316~319 and step 321 as shown in Fig. 4 or Fig. 5 shown in；

If step 326, the second electric current be less than or equal to predetermined current threshold, if the second electric current be greater than predetermined current Threshold value and third duration are less than or equal to the first preset time threshold, and compensator obtains route corresponding with first voltage Voltage, obtain second voltage.

If step 327, second voltage are greater than predetermined voltage threshold, and the 4th duration was greater than third preset time threshold Value, the output voltage that compensator cancels setting series connection inverter is the first predeterminated voltage, and executes the series connection obtained in compensator The electric current of inverter or the route of compensator access, obtains the first electric current.

Wherein, the 4th duration was the duration that second voltage is greater than predetermined voltage threshold.

The circuit connecting mode of the UPFC used in embodiments of the present invention a kind of can be as shown in Figure 6, the UPFC's Circuit may include: current transformer 43, the Quick side of series connection inverter 41, series transformer 42, inverter output end of connecting Way switch 44, compensator access bus 45, bus-bar potential transformer 46, series transformer output end voltage transformer 47 With the current transformer 48, mechanical bypass switch 49, parallel inverter 410 of series transformer output end.The corresponding UPFC of Fig. 6 The equivalent circuit diagram of circuit can be as shown in Figure 7, wherein further include in the corresponding circuit structure of Fig. 7 in Fig. 6 it is unshowned simultaneously Join the current transformer 411 of inverter outlet side and the voltage transformer 412 of parallel inverter outlet side.Specifically, series connection is changed The current transformer 43 of stream device output end is used to obtain the electric current of series connection inverter, and bus-bar potential transformer 46 is for obtaining compensation The voltage of the bus 45 of device access, the voltage transformer 47 of series transformer output end are used to obtain the route of compensator access Voltage, the current transformer 48 of series transformer output end is used to obtain the electric current of the route of compensator access, and parallel connection is changed The current transformer 411 of stream device outlet side is used to obtain the electric current of parallel inverter, the mutual induction of voltage of parallel inverter outlet side Device 412 is used to obtain the voltage of parallel inverter.Quick by-pass switch 44 is in parallel with series transformer 42, is connected to series-transformer Device inputs end side, and mechanical bypass switch 49 is also in parallel with series transformer 42, is connected to series transformer output end, Quick side The connection type of way switch 44 and mechanical bypass switch 49 and series transformer can be as shown in Figure 6.It should be noted that Quick side Way switch 44 is in parallel with series transformer 42, is connected to series transformer output end, i.e., in parallel with mechanical bypass switch 49 to connect Connect the output end (being not shown in Fig. 6) in series transformer 42.

It should be noted that the explanation in the present embodiment with same steps in other embodiments or concept, is referred to Description in other embodiments, details are not described herein again.

The method for reducing influence of the compensator to route distance protection provided by the embodiment of the present invention obtains compensator and connects The electric current of series connection inverter in the route or compensator entered obtains the first electric current, obtains the bus or compensator of compensator access The voltage of the route of access obtains first voltage, is greater than predetermined current threshold in the first electric current, and the first duration was greater than the One preset time threshold exits series connection inverter and series transformer, is less than or equal to predetermined voltage threshold in first voltage, And second the duration be greater than the second preset time threshold when, setting series connection inverter output voltage be the first predeterminated voltage, And the electric current for obtaining element corresponding with the first electric current obtains the second electric current, is greater than predetermined current threshold and third in the second electric current When duration is greater than the first preset time threshold, series connection inverter and series transformer are exited, otherwise the second electric current is unsatisfactory for The voltage that first voltage corresponding route is obtained when above-mentioned condition, obtains second voltage, is greater than predeterminated voltage threshold in second voltage Value and when the 4th duration was greater than third preset time threshold, the output voltage for cancelling setting series connection inverter is first default Voltage, and the electric current for obtaining the route of series connection inverter or compensator access in compensator is executed, obtain the first electric current；This Sample, in line protective device work, when the route of series connection inverter or the compensator access for the compensator that electric system uses Electric current meet preset condition, or the compensator used when electric system series connection inverter or compensator access route Electric current is unsatisfactory for preset condition, when the voltage of route that the series connection inverter or compensator of compensator access meets preset condition, Series connection inverter and the series transformer in compensator are exited, so that series connection inverter and series transformer is not worked, reduces string Join influence of the operation characteristic of inverter and series transformer to line protective device, convenient for the series connection change of current in control compensator The working condition of device and series transformer solves the prior art and asks what the defencive function of line protective device had an impact Topic, it is ensured that line protective device carries out the performance of distance protection to route, has ensured the safe and stable operation of electric system, guarantees Engineering practicability.

Based on previous embodiment, the embodiment of the present invention provides a kind of side of influence of the reduction compensator to route distance protection Method, method includes the following steps:

A, when the route of compensator access works normally, compensator is detected in the route or compensator of compensator access The electric current of series connection inverter obtains the voltage of the bus of the first electric current and compensator access or the route of compensator access, obtains First voltage.

B, compensator compares the relationship between the first electric current and predetermined current threshold.

If c, the first electric current is greater than predetermined current threshold, and the first duration was greater than the first preset time threshold, compensation Device locking series connection inverter, triggering is connected with the quick by-pass switch of series transformer parallel connection, and is closed with series transformer simultaneously The mechanical bypass switch of connection.

Wherein, the first duration was the duration that the first electric current is greater than predetermined current threshold.

D, compensator obtains the voltage of the bus of compensator access or the route of compensator access, obtains first voltage.

E, compensator compares the relationship between first voltage and predetermined voltage threshold.

If f, first voltage is less than or equal to predetermined voltage threshold, and the second duration was greater than the second preset time threshold The output voltage of value, compensator setting series connection inverter is the first predeterminated voltage, and obtains element corresponding with the first electric current Electric current obtains the second electric current.

Wherein, the current in phase of predeterminated voltage and the route of compensator access, or the electricity with the route of compensator access Same phase is pressed, the second duration was the duration that first voltage is less than or equal to predetermined voltage threshold.

If g, the second electric current is greater than predetermined current threshold, and the third duration is greater than the first preset time threshold, compensation Device locking series connection inverter, triggering is connected with the quick by-pass switch of series transformer parallel connection, and is closed with series transformer simultaneously The mechanical bypass switch of connection.

Wherein, the third duration is the duration that the second electric current is greater than predetermined current threshold.

If h, the second electric current be less than or equal to predetermined current threshold, if the second electric current be greater than predetermined current threshold and The third duration is less than or equal to the first preset time threshold, and compensator obtains the second of route corresponding with first voltage Voltage.

If i, second voltage is greater than predetermined voltage threshold, and the 4th duration was greater than third preset time threshold, compensation Device cancel setting series connection inverter output voltage be the first predeterminated voltage, and execute obtain compensator in series connection inverter or The electric current of the route of compensator access, obtains the first electric current.

Wherein, the 4th duration was the duration that second voltage is greater than predetermined voltage threshold.

The embodiment of the invention provides a kind of compensators 5, can be applied to one kind that the corresponding embodiment in Fig. 1~3 provides and subtract In the method for influence of the small compensator to route distance protection, referring to shown in Fig. 8, the compensator include: first acquisition unit 51, First comparing unit 52 exits unit 53, first processing units 54 and the second processing unit 55, in which:

First acquisition unit 51, for obtaining the electric current of the series connection inverter in the route or compensator that compensator accesses, Obtain the first electric current.

Wherein, compensator is used to control the electric current of the route of compensator access, and compensator includes Static Synchronous Series compensation Flow controller and convertible static compensator between device, THE UPFC, line.

First comparing unit 52, for comparing the relationship between the first electric current and predetermined current threshold.

Unit 53 is exited, if being greater than predetermined current threshold for the first electric current, and the first duration was greater than first and presets Time threshold exits series connection inverter and series transformer.

Wherein, series transformer is the equipment in compensator, and the first duration was that the first electric current is greater than predetermined current threshold The duration of value；First preset time threshold is less than at the first time；It is that line protective device accesses compensator at the first time I sections of distance protection of route carry out analytical calculations needed for time and distance protection I sections of the sum of protection act delay time； Alternatively, the first preset time threshold is less than the difference with the response time of quick by-pass switch at the first time.

First acquisition unit 51 is also used to obtain the voltage of the bus of compensator access or the route of compensator access, obtains To first voltage.

First comparing unit 52, for comparing the relationship between first voltage and predetermined voltage threshold.

First processing units 54, if being less than or equal to predetermined voltage threshold, and the second duration for first voltage Greater than the second preset time threshold, the output voltage of setting series connection inverter is the first predeterminated voltage, and is obtained and the first electric current The electric current of corresponding element obtains the second electric current.

Wherein, the second duration was the duration that first voltage is less than or equal to predetermined voltage threshold；Wherein, The difference of the current phase angle of the route of the phase angle of one predeterminated voltage and compensator access is zero；Alternatively, the first predeterminated voltage Phase angle and the difference of voltage phase angle of route of compensator access be zero.

Unit 53 is exited, if being greater than predetermined current threshold for the second electric current, and the third duration is greater than first and presets Time threshold exits series connection inverter and series transformer.

Wherein, the third duration is the duration that the second electric current is greater than predetermined current threshold.

First acquisition unit 51, if being also used to the second electric current less than or equal to predetermined current threshold, if the second electricity Stream is greater than predetermined current threshold and the third duration is less than or equal to the first preset time threshold, obtains and first voltage pair The voltage for the route answered, obtains second voltage.

The second processing unit 55, if being greater than predetermined voltage threshold for second voltage, and the 4th duration was greater than third Preset time threshold, the output voltage for cancelling setting series connection inverter is the first predeterminated voltage, and executes and obtain in compensator The electric current of series connection inverter or the route of compensator access, obtains the first electric current.

Wherein, the 4th duration was the duration that second voltage is greater than predetermined voltage threshold.

Compensator provided by the embodiment of the present invention obtains the series connection change of current in the route or compensator of compensator access The electric current of device obtains the first electric current, and the voltage for obtaining the bus of compensator access or the route of compensator access obtains the first electricity Pressure is greater than predetermined current threshold in the first electric current, and the first duration was greater than the first preset time threshold, exited the series connection change of current Device and series transformer are less than or equal to predetermined voltage threshold in first voltage, and the second duration was greater than second and presets When time threshold, the output voltage of setting series connection inverter is the first predeterminated voltage, and obtains element corresponding with the first electric current Electric current obtain the second electric current, be greater than predetermined current threshold and third duration in the second electric current and be greater than the first preset time threshold When value, series connection inverter and series transformer are exited, otherwise it is corresponding to be unsatisfactory for acquisition first voltage when above-mentioned condition for the second electric current Route voltage, obtain second voltage, being greater than predetermined voltage threshold and the 4th duration in second voltage, to be greater than third pre- If when time threshold, the output voltage for cancelling setting series connection inverter is the first predeterminated voltage, and executes and obtain in compensator The electric current of series connection inverter or the route of compensator access, obtains the first electric current；In this way, in line protective device work, when The electric current of the route of series connection inverter or the compensator access for the compensator that electric system uses meets preset condition, or when electricity The electric current of the route of series connection inverter or the compensator access for the compensator that Force system uses is unsatisfactory for preset condition, works as compensator Series connection inverter or the voltage of route of compensator access meet preset condition, exit series connection inverter and string in compensator Join transformer, series connection inverter and series transformer is made not to work, the operation for reducing series connection inverter and series transformer is special Property influence to line protective device, convenient for the working condition of series connection inverter and series transformer in control compensator, solution The problem of prior art of having determined has an impact the defencive function of line protective device, it is ensured that line protective device carries out route The performance of distance protection has ensured the safe and stable operation of electric system, ensure that engineering practicability.

Specifically, referring to shown in Fig. 8, exiting unit 53 includes: first processing module 531 and Second processing module 532, In:

First processing module 531 for being latched series connection inverter, and triggers the quick bypass in parallel with series transformer and opens Close conducting.

Second processing module 532, for being closed the mechanical bypass switch in parallel with series transformer.

Specifically, being exited after unit 53 referring to shown in Fig. 8 further include: second acquisition unit 56 and third processing unit 57, in which:

Second acquisition unit 56, for obtaining the electric current and voltage of the route of compensator access when preset time arrives.

Third processing unit 57, if the electric current of the route for compensator access within the scope of predetermined current, and compensator The voltage of the route of access enables series connection inverter and series transformer in the second predetermined voltage range.

Specifically, quick by-pass switch is in parallel with series transformer referring to shown in Fig. 9, mechanical bypass switch becomes with connecting Depressor is in parallel, the compensator further include: the first transmission unit 58, third acquiring unit 59 and enabling unit 510, in which:

First transmission unit 58, for when mechanical bypass switch disconnects, transmission to be executed instruction to line protective device.

Wherein, I sections of distance protection for executing instruction the route for being used to indicate line protective device control compensator access move back Out or update compensator access route distance protection impedance definite value.

Third acquiring unit 59 after being spaced preset time period, obtains compensation for timing after transmission executes instruction The electric current and voltage of the route of device access.

Enable unit 510, if for compensator access route electric current within the scope of predetermined current, and compensator access Route voltage in the second predetermined voltage range, enable series connection inverter and series transformer.

First transmission unit 58 is also used to send notification signal to line protective device when mechanical bypass switch is closed.

Wherein, notification signal is used to indicate I sections of distance protection of the route of line protective device input compensation device access, or The distance protection impedance definite value of the route of person's restoration and compensation device access is to update the distance protection impedance of the route of compensator access Value before definite value.

It should be noted that the interactive process in the present embodiment between each unit and module, is referred to Fig. 1~3 pair Interactive process in a kind of method of influence of the reduction compensator that the embodiment answered provides to route distance protection, herein no longer It repeats.

Compensator provided by the embodiment of the present invention obtains the series connection inverter in the route or compensator of compensator access Electric current obtain the first electric current after, the first electric current be greater than predetermined current threshold, and the first duration be greater than first it is default when Between threshold value, exit series connection inverter and series transformer, otherwise obtain the bus of compensator access or the route of compensator access Voltage obtain first voltage, first voltage be less than or equal to predetermined voltage threshold, and the second duration be greater than second When preset time threshold, the output voltage of setting series connection inverter is the first predeterminated voltage, and is obtained corresponding with the first electric current The electric current of element obtains the second electric current, when the second electric current is greater than predetermined current threshold and the third duration is default greater than first Between threshold value when, exit series connection inverter and series transformer, otherwise the second electric current is unsatisfactory for obtaining first voltage when above-mentioned condition The voltage of corresponding route, obtains second voltage, is greater than predetermined voltage threshold and the 4th duration in second voltage and is greater than the When three preset time thresholds, the output voltage for cancelling setting series connection inverter is the first predeterminated voltage, and executes acquisition compensator In series connection inverter or compensator access route electric current, obtain the first electric current；In this way, working in line protective device When, when the electric current of route that the series connection inverter or compensator of the compensator that electric system uses access meets preset condition, or Person is unsatisfactory for preset condition when the electric current of the series connection inverter of the compensator of electric system use or the route of compensator access, when The voltage of the route of series connection inverter or the compensator access of compensator meets preset condition, exits the series connection change of current in compensator Device and series transformer, make to connect inverter and series transformer do not work, and reduce series connection inverter and series transformer Influence of the operation characteristic to line protective device, convenient for the work shape of series connection inverter and series transformer in control compensator State solves the problems, such as that the prior art has an impact the defencive function of line protective device, it is ensured that line protective device is to line Road carries out the performance of distance protection, has ensured the safe and stable operation of electric system, ensure that engineering practicability.

The embodiment of the invention provides a kind of line protective devices 6, can be applied to a kind of reduction of previous embodiment offer In the method for influence of the compensator to route distance protection, referring to Fig.1 shown in 0, which includes: the first receiving unit 61 and Four processing units 62, in which:

First receiving unit 61, for receiving executing instruction for compensator transmission.

Fourth processing unit 62 is executed instruction for responding, I sections of distance protection for exiting the route of compensator access.

First receiving unit 62 is also used to receive the notification signal of compensator transmission.

Fourth processing unit 62, is also used to respond notification signal, and I sections of distance protection of the route of input compensation device access.

The embodiment of the invention provides a kind of line protective device, a kind of reduction that can be applied to previous embodiment offer is mended In the method for repaying influence of the device to route distance protection, which includes: the second receiving unit, the 5th processing unit, at the 6th Manage unit, the first computing unit and the first setting unit, in which:

Second receiving unit, for receiving executing instruction for compensator transmission.

5th processing unit is executed instruction for responding, and obtains the distance protection impedance definite value of the route of compensator access And it is set as the first impedance.

6th processing unit for obtaining the voltage and current of series connection inverter output, and calculates series connection inverter output The ratio of voltage and current obtain the second impedance.

First computing unit obtains third impedance for the first impedance to be added with the second impedance.

The distance protection impedance definite value of first setting unit, the route for accessing compensator is set as third impedance.

Second receiving unit is also used to receive the notification signal of compensator transmission.

5th processing unit is also used to respond notification signal, and the distance protection impedance of the route of compensator access is determined Value is set as the first impedance.

The embodiment of the invention provides a kind of line protective device, a kind of reduction that can be applied to previous embodiment offer is mended In the method for repaying influence of the device to route distance protection, which includes: third receiving unit, the 7th processing unit, the second meter Calculate unit and the second setting unit, in which:

Third receiving unit, for receiving executing instruction for compensator transmission.

7th processing unit is executed instruction for responding, and obtains the distance protection impedance definite value of the route of compensator access And it is set as the first impedance.

Second computing unit obtains the 4th impedance for the first impedance to be added with the leakage reactance of series transformer.

The distance protection impedance definite value of second setting unit, the route for accessing compensator is set as the 4th impedance.

Third receiving unit is also used to receive the notification signal of compensator transmission.

7th processing unit is also used to respond notification signal, and the distance protection impedance of the route of compensator access is determined Value is set as the first impedance.

Based on previous embodiment, the embodiment of the invention provides a kind of compensator, which includes: detection unit, Two comparing units, the 8th processing unit, the 9th processing unit and the 4th acquiring unit, in which:

Detection unit, when the route for accessing when compensator works normally, the route of detection compensator access or compensation The electric current of series connection inverter in device obtains the electricity of the bus of the first electric current and compensator access or the route of compensator access Pressure, obtains first voltage.

Second comparing unit, for comparing the relationship between the first electric current and predetermined current threshold.

8th processing unit, if being greater than predetermined current threshold for the first electric current, and the first duration was greater than first in advance If time threshold, locking series connection inverter, triggering is connected with the quick by-pass switch of series transformer parallel connection, and is closed and connects The mechanical bypass switch of transformers connected in parallel.

Wherein, the first duration was the duration that the first electric current is greater than predetermined current threshold.

Second comparing unit is also used to compare the relationship between first voltage and predetermined voltage threshold.

9th processing unit, if being less than or equal to predetermined voltage threshold for first voltage, and the second duration is big In the second preset time threshold, the output voltage that series connection inverter is arranged is the first predeterminated voltage, and is obtained and the first electric current pair The electric current for the element answered obtains the second electric current.

Wherein, the current in phase of predeterminated voltage and the route of compensator access, or the electricity with the route of compensator access Same phase is pressed, the second duration was the duration that first voltage is less than or equal to predetermined voltage threshold.

8th processing unit, if being also used to the second electric current greater than predetermined current threshold, and the third duration is greater than first Preset time threshold, locking series connection inverter, triggering is connected with the quick by-pass switch of series transformer parallel connection, and is closed and string Join the mechanical bypass switch of transformers connected in parallel.

Wherein, the third duration is the duration that the second electric current is greater than predetermined current threshold.

4th acquiring unit, if being also used to the second electric current less than or equal to predetermined current threshold, if the second electric current Greater than predetermined current threshold and the third duration is less than or equal to the first preset time threshold, obtains corresponding with first voltage Route second voltage.

9th processing unit, if being also used to second voltage greater than predetermined voltage threshold, and the 4th duration was greater than third Preset time threshold, the output voltage for cancelling setting series connection inverter is the first predeterminated voltage, and executes and obtain in compensator The electric current of series connection inverter or the route of compensator access, obtains the first electric current.

Wherein, the 4th duration was the duration that second voltage is greater than predetermined voltage threshold.

In practical applications, first acquisition unit 51, the first comparing unit 52, exit unit 53, first processing units 54, The second processing unit 55, third processing unit 57, the first transmission unit 58, third acquiring unit 59, opens second acquisition unit 56 With unit 510, first processing module 531, Second processing module 532, the first receiving unit 61 and fourth processing unit 62 By central processing unit (Central Processing Unit, CPU), the microprocessor being located in wireless data sending device (Micro Processor Unit, MPU), digital signal processor (Digital Signal Processor, DSP) or scene Programmable gate array (Field Programmable Gate Array, FPGA) etc. is realized.

It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program Product.Therefore, the shape of hardware embodiment, software implementation or embodiment combining software and hardware aspects can be used in the present invention Formula.Moreover, the present invention, which can be used, can use storage in the computer that one or more wherein includes computer usable program code The form for the computer program product implemented on medium (including but not limited to magnetic disk storage and optical memory etc.).

The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.

The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.

Claims (20)

1. a kind of method of influence of reduction compensator to route distance protection, which is characterized in that the described method includes:

The electric current for obtaining the series connection inverter in the route or compensator of compensator access, obtains the first electric current；Wherein, the benefit The electric current of route of the device for controlling compensator access is repaid, the compensator includes static synchronous series compensator, Unified Power Flow Flow controller and convertible static compensator between controller, line；

The voltage for obtaining the bus of compensator access or the route of compensator access, obtains first voltage；

Compare the relationship between first electric current and predetermined current threshold；

Compare the relationship between the first voltage and predetermined voltage threshold；

If first electric current is greater than the predetermined current threshold, and the first duration was greater than the first preset time threshold, moved back The series connection inverter and series transformer out；Wherein, the series transformer is the equipment in the compensator, described first Duration is the duration that first electric current is greater than the predetermined current threshold；

If the first voltage is less than or equal to the predetermined voltage threshold, and the second duration was greater than the second preset time Threshold value, the output voltage that the series connection inverter is arranged is the first predeterminated voltage, and obtains member corresponding with first electric current The electric current of part obtains the second electric current；Wherein, second duration is that the first voltage is less than or equal to described preset The duration of voltage threshold；

If second electric current is greater than the predetermined current threshold, and the third duration is greater than the first preset time threshold Value, exits the series connection inverter and the series transformer；Wherein, the third duration is that second electric current is greater than The duration of the predetermined current threshold；

If second electric current is less than or equal to the predetermined current threshold, if second electric current be greater than it is described default Current threshold and the third duration are less than or equal to first preset time threshold, acquisition and the first voltage The voltage of corresponding route, obtains second voltage；

If the second voltage is greater than the predetermined voltage threshold, and the 4th duration was greater than third preset time threshold, took Disappearing and the output voltage of the series connection inverter is arranged is first predeterminated voltage, and executes the series connection in the acquisition compensator The electric current of inverter or the route of compensator access, obtains the first electric current；Wherein, the 4th duration is second electricity Pressure is greater than the duration of the predetermined voltage threshold.

2. the method according to claim 1, wherein described exit the series connection inverter and the series-transformer Device, comprising:

It is latched the series connection inverter, and triggers and is connected with the quick by-pass switch of the series transformer parallel connection；

It is closed the mechanical bypass switch in parallel with the series transformer.

3. method according to claim 1 or 2, which is characterized in that described to exit the series connection inverter and the series connection After transformer, further includes:

When preset time arrives, the electric current and voltage of the route of the compensator access are obtained；

If the electric current of the route of the compensator access is within the scope of predetermined current, and the voltage of the route of compensator access In the second predetermined voltage range, the series connection inverter and the series transformer are enabled.

4. the method according to claim 1, wherein quickly by-pass switch it is in parallel with the series transformer, machine Tool by-pass switch is in parallel with the series transformer, the method also includes:

When the mechanical bypass switch disconnects, transmission is executed instruction to line protective device；Wherein, described execute instruction is used for Indicate that the line protective device controls I sections of distance protection of the route of compensator access and exits or update the compensation The distance protection impedance definite value of the route of device access；

Timing after executing instruction described in the transmission after being spaced preset time period, obtains the route of the compensator access Electric current and voltage；

If the electric current of the route of the compensator access is within the scope of predetermined current, and the voltage of the route of compensator access In the second predetermined voltage range, the series connection inverter and the series transformer are enabled；

When mechanical bypass switch closure, notification signal is sent to the line protective device；Wherein, the notification signal I sections of distance protection of the route of the line protective device input compensation device access are used to indicate, or restores the compensator Before the distance protection impedance definite value of the route of access is the distance protection impedance definite value for updating the route of the compensator access Value.

5. the method according to claim 1, wherein

The difference of the current phase angle of the route of the phase angle of first predeterminated voltage and compensator access is zero；

Alternatively, the difference of the voltage phase angle for the route that the phase angle of first predeterminated voltage is accessed with the compensator is Zero.

6. the method according to claim 1, wherein

First preset time threshold is less than at the first time；Wherein, the first time is line protective device to the benefit Time and distance protection I sections of the protection act needed for repaying I sections of distance protection progress analytical calculations of the route of device access The sum of delay time；

Alternatively, first preset time threshold is less than the difference of the first time and the response time of quick by-pass switch.

7. a kind of method of influence of reduction compensator to route distance protection, which is characterized in that the described method includes:

Receive executing instruction for compensator transmission；

It is executed instruction described in response, I sections of distance protection for exiting the route of compensator access；

Receive the notification signal that the compensator is sent；

The notification signal is sent in the mechanical bypass switch closure in parallel with the series transformer in the compensator；When One electric current is greater than predetermined current threshold, and the first duration was greater than the first preset time threshold, or when the second electric current is greater than Predetermined current threshold, and when the third duration is greater than the first preset time threshold, mechanical bypass switch closure；

Wherein, the first electric current is the electric current of the series connection inverter in the route or compensator of compensator access；

First duration was the duration that first electric current is greater than the predetermined current threshold；

Second electric current is that first voltage is less than or equal to predetermined voltage threshold, and the second duration was greater than the second preset time When threshold value, the electric current of element corresponding with the first electric current；

First voltage is the voltage of the bus of compensator access or the route of compensator access；

Second duration was the duration that the first voltage is less than or equal to the predetermined voltage threshold；

The third duration is the duration that second electric current is greater than the predetermined current threshold；

The notification signal is responded, I sections of distance protection of the route of the compensator access are put into.

8. a kind of method of influence of reduction compensator to route distance protection, which is characterized in that the described method includes:

Receive executing instruction for compensator transmission；

It is executed instruction described in response, obtain the distance protection impedance definite value of the route of compensator access and is set as the first impedance；

The voltage and current of series connection inverter output is obtained, and calculates the ratio of the voltage and current of the series connection inverter output Obtain the second impedance；

First impedance is added with second impedance, obtains third impedance；

The third impedance is set by the distance protection impedance definite value for the route that the compensator accesses；

Receive the notification signal that the compensator is sent；

The notification signal is responded, and sets described first for the distance protection impedance definite value for the route that the compensator accesses Impedance.

9. a kind of method of influence of reduction compensator to route distance protection, which is characterized in that the described method includes:

Receive executing instruction for compensator transmission；

It is executed instruction described in response, obtain the distance protection impedance definite value of the route of the compensator access and is set as the first resistance It is anti-；

It is added first impedance to obtain the 4th impedance with the leakage reactance of series transformer；

The 4th impedance is set by the distance protection impedance definite value for the route that the compensator accesses；

Receive the notification signal that the compensator is sent；

The notification signal is responded, and sets described first for the distance protection impedance definite value for the route that the compensator accesses Impedance.

10. a kind of method of influence of reduction compensator to route distance protection, which is characterized in that the described method includes:

When the route of compensator access works normally, the series connection inverter in the route or compensator of compensator access is detected Electric current obtains the first electric current, and detects the voltage of the bus of compensator access or the route of compensator access, obtains first Voltage；

Compare the relationship between first electric current and predetermined current threshold；

If first electric current is greater than the predetermined current threshold, and the first duration was greater than the first preset time threshold, closed The series connection inverter is locked, triggering is connected with the quick by-pass switch of series transformer parallel connection, and is closed and the series-transformer The mechanical bypass switch of device parallel connection；Wherein, first duration is that first electric current is greater than the predetermined current threshold Duration；

Compare the relationship between the first voltage and predetermined voltage threshold；

If the first voltage is less than or equal to the predetermined voltage threshold, and the second duration was greater than the second preset time Threshold value, the output voltage that the series connection inverter is arranged is the first predeterminated voltage, and obtains member corresponding with first electric current The electric current of part obtains the second electric current；Wherein, the current in phase of first predeterminated voltage and the route of compensator access, It perhaps is that the first voltage is less than or waits with arc in phase second duration of the route of compensator access In the duration of the predetermined voltage threshold；

If second electric current is greater than the predetermined current threshold, and the third duration is greater than the first preset time threshold Value, is latched the series connection inverter, and triggering is connected with the quick by-pass switch of the series transformer parallel connection, and closure with it is described The mechanical bypass switch of series transformer parallel connection；Wherein, the third duration is that second electric current is greater than described preset The duration of current threshold；

If second electric current is less than or equal to the predetermined current threshold, if second electric current be greater than it is described default Current threshold and the third duration are less than or equal to first preset time threshold, acquisition and the first voltage The second voltage of corresponding route；

If the second voltage is greater than the predetermined voltage threshold, and the 4th duration was greater than third preset time threshold, took Disappearing and the output voltage of the series connection inverter is arranged is first predeterminated voltage, and executes the series connection change of current obtained in compensator The electric current of device or the route of compensator access, obtains the first electric current；Wherein, the 4th duration is that the second voltage is big In the duration of the predetermined voltage threshold.

11. a kind of compensator, which is characterized in that the compensator includes: first acquisition unit, the first comparing unit, exits list Member, first processing units and the second processing unit；Wherein:

The first acquisition unit is obtained for obtaining the electric current of the series connection inverter in the route or compensator that compensator accesses To the first electric current；Wherein, the compensator is used to control the electric current of the route of compensator access, and the compensator includes static same Walk flow controller and convertible static compensator between series compensator, THE UPFC, line；

The first acquisition unit is also used to obtain the voltage of the bus of compensator access or the route of compensator access, Obtain first voltage；

First comparing unit, for the relationship between first electric current and predetermined current threshold；

First comparing unit, for the relationship between the first voltage and predetermined voltage threshold；

It is described to exit unit, if being greater than the predetermined current threshold for first electric current, and the first duration was greater than the One preset time threshold exits the series connection inverter and series transformer；Wherein, the series transformer is the compensator In equipment, first duration be first electric current be greater than the predetermined current threshold duration；

The first processing units, if being less than or equal to the predetermined voltage threshold for the first voltage, and second holds The continuous time is greater than the second preset time threshold, and the output voltage that the series connection inverter is arranged is the first predeterminated voltage, and is obtained The electric current of element corresponding with first electric current, obtains the second electric current；Wherein, second duration is first electricity Pressure is less than or equal to the duration of the predetermined voltage threshold；

It is described to exit unit, if being greater than the predetermined current threshold for second electric current, and the third duration is greater than institute The first preset time threshold is stated, the series connection inverter and the series transformer are exited；Wherein, the third duration is Second electric current is greater than the duration of the predetermined current threshold；

The first acquisition unit, if being also used to second electric current less than or equal to the predetermined current threshold, Huo Zheruo When second electric current is greater than the predetermined current threshold and the third duration default less than or equal to described first Between threshold value, obtain the voltage of corresponding with first voltage route, obtain second voltage；

Described the second processing unit, if being greater than the predetermined voltage threshold for the second voltage, and the 4th duration is big In third preset time threshold, the output voltage for cancelling the setting series connection inverter is first predeterminated voltage, and is executed The electric current of series connection inverter in the route or compensator for obtaining compensator access, obtains the first electric current；Wherein, described Four duration were the duration that the second voltage is greater than the predetermined voltage threshold.

12. compensator according to claim 11, which is characterized in that it is described exit unit include: first processing module and Second processing module；Wherein:

The first processing module for being latched the series connection inverter, and triggers in parallel with the series transformer quick By-pass switch conducting；

The Second processing module, for being closed the mechanical bypass switch in parallel with the series transformer.

13. compensator according to claim 11 or 12, which is characterized in that described to exit after unit further include: second Acquiring unit and third processing unit；Wherein:

The second acquisition unit, the electric current and electricity of the route for when preset time arrives, obtaining the compensator access Pressure；

The third processing unit, it is and described if the electric current of the route for compensator access is within the scope of predetermined current The voltage of the route of compensator access enables the series connection inverter and the series-transformer in the second predetermined voltage range Device.

14. compensator according to claim 11, which is characterized in that quick by-pass switch and the series transformer are simultaneously Connection, mechanical bypass switch is in parallel with the series transformer, the compensator further include: the first transmission unit, third obtain single Member and enabling unit；Wherein:

First transmission unit, for when the mechanical bypass switch disconnects, transmission to be executed instruction to line protective device； Wherein, described to execute instruction the distance protection I for being used to indicate the route that the line protective device controls the compensator access Section exits or updates the distance protection impedance definite value of the route of the compensator access；

The third acquiring unit after being spaced preset time period, obtains institute for timing after executing instruction described in the transmission State the electric current and voltage of the route of compensator access；

The enabling unit, if the electric current of the route for compensator access within the scope of predetermined current, and the compensation The voltage of the route of device access enables the series connection inverter and the series transformer in the second predetermined voltage range；

First transmission unit is also used to send notification signal to the route when the mechanical bypass switch is closed and protect Protect equipment；Wherein, the distance that the notification signal is used to indicate the route of the line protective device input compensation device access is protected I sections of shield, or restoring the distance protection impedance definite value of the route of the compensator access is the line for updating the compensator access Value before the distance protection impedance definite value on road.

15. compensator according to claim 11, which is characterized in that

The difference of the current phase angle of the route of the phase angle of first predeterminated voltage and compensator access is zero；

Alternatively, the difference of the voltage phase angle for the route that the phase angle of first predeterminated voltage is accessed with the compensator is Zero.

16. compensator according to claim 11, which is characterized in that

First preset time threshold is less than at the first time；Wherein, the first time is line protective device to the benefit Time and distance protection I sections of the protection act needed for repaying I sections of distance protection progress analytical calculations of the route of device access The sum of delay time；

Alternatively, first preset time threshold is less than the difference of the first time and the response time of quick by-pass switch.

17. a kind of line protective device, which is characterized in that the equipment includes: the first receiving unit and fourth processing unit；Its In:

First receiving unit, for receiving executing instruction for compensator transmission；

The fourth processing unit, for respond it is described execute instruction, I sections of distance protection for exiting the route of compensator access；

First receiving unit is also used to receive the notification signal that the compensator is sent；

The notification signal is sent in the mechanical bypass switch closure in parallel with the series transformer in the compensator；When One electric current is greater than predetermined current threshold, and the first duration was greater than the first preset time threshold, or when the second electric current is greater than Predetermined current threshold, and when the third duration is greater than the first preset time threshold, mechanical bypass switch closure；

Wherein, the first electric current is the electric current of the series connection inverter in the route or compensator of compensator access；

First duration was the duration that first electric current is greater than the predetermined current threshold；

Second electric current is that first voltage is less than or equal to predetermined voltage threshold, and the second duration was greater than the second preset time When threshold value, the electric current of element corresponding with the first electric current；

First voltage is the voltage of the bus of compensator access or the route of compensator access；

Second duration was the duration that the first voltage is less than or equal to the predetermined voltage threshold；

The third duration is the duration that second electric current is greater than the predetermined current threshold；

The fourth processing unit is also used to respond the notification signal, and the distance for putting into the route of the compensator access is protected I sections of shield.

18. a kind of line protective device, which is characterized in that the equipment includes: the second receiving unit, the 5th processing unit, Six processing units, the first computing unit and the first setting unit；Wherein:

Second receiving unit, for receiving executing instruction for compensator transmission；

5th processing unit, for respond it is described execute instruction, obtain the distance protection of the route of the compensator access Impedance definite value is simultaneously set as the first impedance；

6th processing unit for obtaining the voltage and current of series connection inverter output, and calculates the series connection inverter The ratio of the voltage and current of output obtains the second impedance；

First computing unit obtains third impedance for first impedance to be added with second impedance；

First setting unit, the distance protection impedance definite value of the route for accessing the compensator are set as described Three impedances；

Second receiving unit is also used to receive the notification signal that the compensator is sent；

5th processing unit is also used to respond the notification signal, and the distance for the route that the compensator is accessed is protected Shield impedance definite value is set as first impedance.

19. a kind of line protective device, which is characterized in that the equipment includes: third receiving unit, the 7th processing unit, Two computing units and the second setting unit；Wherein:

The third receiving unit, for receiving executing instruction for compensator transmission；

7th processing unit, for respond it is described execute instruction, obtain the distance protection impedance of the route of compensator access Definite value is simultaneously set as the first impedance；

Second computing unit, for being added first impedance to obtain the 4th impedance with the leakage reactance of series transformer；

Second setting unit, the distance protection impedance definite value of the route for accessing the compensator are set as described Four impedances；

The third receiving unit is also used to receive the notification signal that the compensator is sent；

7th processing unit is also used to respond the notification signal, and the distance for the route that the compensator is accessed is protected Shield impedance definite value is set as first impedance.

20. a kind of compensator, which is characterized in that the compensator includes: detection unit, the second comparing unit, the 8th processing list Member, the 9th processing unit and the 4th acquiring unit；Wherein:

The detection unit, when the route for accessing when compensator works normally, the route of detection compensator access or compensation In device series connection inverter electric current, obtain the first electric current, and detect compensator access bus or the compensator access The voltage of route, obtains first voltage；

Second comparing unit, for the relationship between first electric current and predetermined current threshold；

8th processing unit, if being greater than the predetermined current threshold for first electric current, and the first duration is big In the first preset time threshold, it is latched the series connection inverter, triggering is connected with the quick by-pass switch of series transformer parallel connection, And it is closed the mechanical bypass switch in parallel with the series transformer；Wherein, first duration is first electric current Greater than the duration of the predetermined current threshold；

Second comparing unit, the relationship being also used between first voltage and predetermined voltage threshold described in comparison；

9th processing unit, if being less than or equal to the predetermined voltage threshold for the first voltage, and second holds The continuous time is greater than the second preset time threshold, and the output voltage that the series connection inverter is arranged is the first predeterminated voltage, and is obtained The electric current of element corresponding with first electric current, obtains the second electric current；Wherein, first predeterminated voltage and the compensator The current in phase of the route of access, or the arc in phase with the route of compensator access, second duration is The first voltage is less than or equal to the duration of the predetermined voltage threshold；

8th processing unit, if being also used to second electric current is greater than the predetermined current threshold, and third duration Greater than first preset time threshold, it is latched the series connection inverter, triggers the Quick side in parallel with the series transformer Way switch conducting, and it is closed the mechanical bypass switch in parallel with the series transformer；Wherein, the third duration is institute State the duration that the second electric current is greater than the predetermined current threshold；

4th acquiring unit, if being also used to second electric current less than or equal to the predetermined current threshold, Huo Zheruo When second electric current is greater than the predetermined current threshold and the third duration default less than or equal to described first Between threshold value, obtain the second voltage of corresponding with first voltage route；

9th processing unit, if being also used to the second voltage is greater than the predetermined voltage threshold, and the 4th duration Greater than third preset time threshold, the output voltage for cancelling the setting series connection inverter is first predeterminated voltage, and is held Row obtains the electric current of the series connection inverter in compensator or the route of compensator access, obtains the first electric current；Wherein, the described 4th Duration is the duration that the second voltage is greater than the predetermined voltage threshold.