CN104242255A - GIS (gas insulated switchgear) same-frequency same-phase alternating-current voltage withstand test control protection method and system - Google Patents
GIS (gas insulated switchgear) same-frequency same-phase alternating-current voltage withstand test control protection method and system Download PDFInfo
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Abstract
The invention discloses a GIS (gas insulated switchgear) same-frequency same-phase alternating-current voltage withstand test control protection method which includes frequency and phase protection, over-voltage protection and high-voltage flash protection. Particularly, the method includes the steps of firstly, acquiring a reference voltage value and a test voltage value and calculating a frequency difference and a phase difference; secondly, comparing the voltage values and the phase difference with preset protective constant values; and thirdly, judging whether any of the three types of protection meets action condition or not; if no, then allowing a same-frequency same-phase power supply to run normally; if yes, then cutting off the power supply. The method is applied to the same-frequency same-phase alternating-current voltage withstand test and integrates functions of protection, control and measurement. Compared with the existing control protection method, the frequency and phase protection method based on frequency and phase judgment and the overvoltage and flash protection to isolating distance can effectively prevent emergency such as frequency and phase inconsistency and breakdown of isolating distance caused in the same-frequency same-phase alternating-current voltage withstand test from damaging running systems and test equipment and hurting personnel.
Description
Technical field
The present invention relates to technical field of electric power, particularly a kind of GIS is with frequency homophase AC voltage withstand test Control protection method and system.
Background technology
Cubicle Gas-Insulated Switchgear (hereinafter referred to as GIS) is applied more and more extensive in electric power system, but GIS, after interval enlarging and maintenance (particularly double bus scheme GIS), all needs to carry out withstand voltage test when original operation brownout.GIS expansion spacing or Disintegration overhaul interval and adjacent part of running disconnect by means of only isolating switch, if operation part does not have a power failure, then keep apart during ac voltage withstanding and turn off mouth place and test voltage may occur oppositely superpose with working voltage the situation causing isolation fracture to puncture and then jeopardize operational outfit, therefore during the standard regulation GIS withstand voltage test such as DL/T555, DL/T617, DL/T618, neighbouring device answers power-off and ground connection, otherwise should consider to take measures due to the damage punctured suddenly original part causes.
And for some important load-center substations and the GIS transformer station with important loads such as traction station of electrical railroad, particularly double-bus GIS, these transformer stations require very high to power supply reliability, are difficult to carry out withstand voltage test when full station has a power failure.For head it off, spy proposes GIS with frequency homophase alternating current withstand voltage test method.
GIS adopts neighbouring device working voltage (as getting bus-bar potential transformer secondary side voltage) as the reference voltage with frequency homophase AC voltage withstand test technology, test voltage is obtained by resonance manner, and utilize PHASE-LOCKED LOOP PLL TECHNIQUE to carry out real time dynamic tracing to its frequency and phase place, the frequency of test voltage and working voltage and phase place are in frequency cophasal state.
Under same cophasal state frequently, the voltage that the isolating switch fracture place of operation part and junction, tested interval bears is the difference of working voltage and test voltage, as shown in Figure 1, the real difference for both sides absolute value of voltage of the voltage magnitude that isolating switch incision position bears, much smaller than the frequency breakdown voltage of isolating switch fracture, thus this isolating switch fracture can not be caused to puncture, also can not the GIS device that other is in charging operation state be had an impact.Wherein, U1 represents test voltage; U2 represents working voltage; △ U represents fracture voltage; Same homophase withstand voltage test frequently carries out under the condition that adjacent part is charged, and its safety and reliability is particularly important.In order to avoid occurring that in test various accident makes the asynchronous or isolation fracture of frequency plot puncture and have a negative impact to adjacent operation part and experimental facilities and the person caused to danger, will seeking common ground frequently, homophase withstand voltage test control protective unit is enough reliable.
The GIS withstand voltage test before extensively adopted is to test voltage frequency and phase place not requirement, and corresponding control protective unit is mainly protected by overvoltage protection and arc protection two kinds of modes, output of cutting off the electricity supply.Overvoltage protection refers to acquisition test voltage, and when test voltage is higher than set point, protection act is cut off the electricity supply; Arc protection, i.e. o-volt protection, when causing voltage to reduce due to flashover, protection act is cut off the electricity supply.
But above-mentioned GPF (General Protection False mode cannot meet the protection requirement with homophase withstand voltage test frequently; under above-mentioned protected mode; if with homophase failure frequently, (namely test voltage and reference voltage frequency plot change in process of the test; asynchronous), under serious conditions, test voltage and reference voltage oppositely may cause isolation switch to puncture and cause charging operation partial fault.In this case, protection can not action, cannot protect equipment.
Therefore, how protecting with homophase withstand voltage test frequently, avoiding operational outfit, testing equipment and personnel to suffer damage under the conditions such as fracture punctures, is current problem demanding prompt solution.
Summary of the invention
In view of this, the one that technical problem to be solved by this invention is to provide is with frequency homophase withstand voltage test Control protection method and system, and solving GPF (General Protection False mode cannot to the problem protected with homophase withstand voltage test frequently.
An object of the present invention proposes a kind of GIS with homophase controlling test guard method frequently; Two of object of the present invention proposes a kind of GIS with frequency homophase controlling test protection system.
An object of the present invention is achieved through the following technical solutions:
A kind of GIS provided by the invention, with homophase controlling test guard method frequently, comprises the following steps:
S100: obtain reference voltage and test voltage;
S200: the magnitude of voltage of computing reference voltage and test voltage, difference on the frequency and phase difference;
S300: obtain the rated voltage of equipment under test, preset protection definite value;
S400: with reference to voltage and test voltage magnitude of voltage, difference on the frequency and phase difference and preset and protect definite value to compare, the whether action of determination frequency phase protection, high pressure overvoltage protection and high pressure arc protection; If each parameter exceedes preset protection definite value, then corresponding protection act, cuts off the electricity supply; Preset protection definite value if do not exceeded, then protection is failure to actuate;
S500: if discontented foot protection operation condition, then normally work with frequency homophase experimental rig.
Further, the frequency plot in described step S400 protects concrete multilevel iudge to comprise the following steps:
A) when pilot system rated voltage is 110kV:
S401: as test voltage≤60kV, frequency plot protection is failure to actuate;
S402: as test voltage≤100kV and phase difference more than 60 ° time, then frequency plot protection act;
S403: as test voltage > 100kV and phase difference more than 30 ° time, then frequency plot protection act;
B) when pilot system rated voltage is 220kV:
S404: as test voltage≤120kV, frequency plot protection is failure to actuate;
S405: as test voltage≤180kV and phase difference more than 60 ° time, then frequency plot action;
S406: as test voltage > 180kV and phase difference more than 30 ° time, then frequency plot action;
C) when pilot system rated voltage is 500kV:
S407: as test voltage≤148kV, frequency plot protection is failure to actuate;
S408: as test voltage≤237kV and phase difference more than 60 ° time, then frequency plot protection act;
S409: as test voltage > 237kV and phase difference more than 30 ° time, then frequency plot protection act.
Further, the concrete multilevel iudge of described step S400 mesohigh overvoltage protection is further comprising the steps of:
S410: obtain and calculate the real-time test voltage value of each cycle and reference voltage level;
S411: when test voltage exceedes default protection definite value, the action of high pressure overvoltage protection;
S412: when this cycle reference voltage level compares last cycle reference voltage level increment more than 10%, the action of high pressure overvoltage protection;
S413: when isolating switch fracture voltage value, the i.e. phasor difference of test voltage and reference voltage, when exceeding default protection definite value, the action of high pressure overvoltage protection;
S414: when this cycle test voltage value compare last cycle test voltage value increase above 10% time, the action of high pressure overvoltage protection.
Further, the concrete multilevel iudge of described step S400 mesohigh arc protection is further comprising the steps of:
S415: obtain and calculate the real-time test voltage of each cycle and reference voltage level;
S416: when treating examination interval flashover, this test voltage value compare when last cycle test voltage value decreases beyond 10% or this test voltage value lower than default protection definite value time, the action of high pressure arc protection;
S417: when adjacent busbar flashover, this reference voltage level compare when last cycle reference voltage level decreases beyond 10% or this reference voltage level lower than default protection definite value time, the action of high pressure arc protection;
S418: work as flashover, this isolation fracture magnitude of voltage compare when last cycle isolation fracture magnitude of voltage decreases beyond 10% or this test voltage value lower than default protection definite value time, the action of high pressure arc protection.
Two of object of the present invention is achieved through the following technical solutions:
A kind of GIS provided by the invention, with frequency homophase controlling test protection system, comprising: protection monitoring module, high-tension measurement module, PLL control module and public control module;
Described protection monitoring module, for acquisition test voltage and reference voltage signal, compare both frequency and phase place, and calculate, the whether action of determination frequency phase protection, high pressure overvoltage protection, high pressure arc protection, judges that signal is sent to public control module the most at last;
Described high-tension measurement module, for acquisition test voltage and reference voltage, measures in real time, and measurement data is sent to public control module;
Described PLL control module, for acquisition test voltage and reference voltage, is undertaken, with homophase adjustment frequently, reaching and exporting signal to public control module with after frequency homophase by phase-locked loop.
Described public control module, for accepting the judgement signal protecting monitoring module to export, being sent to frequency homophase power supply by power supply communication optical fiber, controlling mains switch, play a protective role; For accepting the measurement data that high-tension measurement module exports, and data are presented on a display screen by display module; For accepting the same frequency in-phase signal that PLL control module exports, and by same homophase power supply frequently will be sent to frequency in-phase signal with frequency with phase control optical fiber; For accepting input module control signal, described control signal comprises voltage up-down signal and start and stop class signal, controls to realize voltage up-down, start and stop with frequency homophase power supply by power supply communication optical fiber; For accepting input module data-signal, described data-signal for presetting protection definite value class signal, and sends the data to protecting control module for the protection of calculating judgement.
Described protection monitoring module comprises frequency plot protection module, high pressure overvoltage protective module and high pressure arc protection module;
1) described frequency plot protection module detailed process is as follows:
A) when pilot system rated voltage is 110kV:
S401: as test voltage≤60kV, frequency plot protection is failure to actuate;
S402: as test voltage≤100kV and phase difference more than 60 ° time, then frequency plot protection act;
S403: as test voltage > 100kV and phase difference more than 30 ° time, then frequency plot protection act;
B) when pilot system rated voltage is 220kV:
S404: as test voltage≤120kV, frequency plot protection is failure to actuate;
S405: as test voltage≤180kV and phase difference more than 60 ° time, then frequency plot action;
S406: as test voltage > 180kV and phase difference more than 30 ° time, then frequency plot action;
C) when pilot system rated voltage is 500kV:
S407: as test voltage≤148kV, frequency plot protection is failure to actuate;
S408: as test voltage≤237kV and phase difference more than 60 ° time, then frequency plot protection act;
S409: as test voltage > 237kV and phase difference more than 30 ° time, then frequency plot protection act.
2) described high pressure overvoltage protective module detailed process comprises:
S410: obtain and calculate the real-time test voltage value of each cycle and reference voltage level;
S411: when test voltage exceedes default protection definite value, the action of high pressure overvoltage protection;
S412: when this cycle reference voltage level compares last cycle reference voltage level increment more than 10%, the action of high pressure overvoltage protection;
S413: when isolating switch fracture voltage value, the i.e. phasor difference of test voltage and reference voltage, when exceeding default protection definite value, the action of high pressure overvoltage protection;
S414: when this cycle test voltage value compare last cycle test voltage value increase above 10% time, the action of high pressure overvoltage protection.
3) described high pressure arc protection module detailed process comprises:
S415: obtain and calculate the real-time test voltage of each cycle and reference voltage level;
S416: when treating examination interval flashover, this test voltage value compare when last cycle test voltage value decreases beyond 10% or this test voltage value lower than default protection definite value time, the action of high pressure arc protection;
S417: when adjacent busbar flashover, this reference voltage level compare when last cycle reference voltage level decreases beyond 10% or this reference voltage level lower than default protection definite value time, the action of high pressure arc protection;
S418: work as flashover, this isolation fracture magnitude of voltage compare when last cycle isolation fracture magnitude of voltage decreases beyond 10% or this test voltage value lower than default protection definite value time, the action of high pressure arc protection.
Beneficial effect of the present invention is: a kind of Control protection method be applied to frequency homophase AC voltage withstand test provided by the invention, integrates protection, control, measures three zones.Method provided by the invention is based on frequency plot protection, and the real-time witness mark voltage of each cycle and test voltage, and calculate the phase difference of test voltage and busbar voltage, when phase difference value exceedes setting value, protection act, cuts off the electricity supply.Additionally provide the guard method of fracture overvoltage and flashover, the real-time witness mark voltage of each cycle and test voltage, the protection act when fracture voltage exceedes set point simultaneously; When fracture punctures, during fracture voltage bust, protection act.The method effectively avoids the various accidents occurred in frequently homophase withstand voltage test and makes the asynchronous or isolation fracture of frequency plot puncture and have a negative impact to adjacent operation part and cause danger to experimental facilities and the person.
Accompanying drawing explanation
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Fig. 1 is with isolating switch fracture voltage waveform schematic diagram under frequency cophasal state;
A kind of GIS that Fig. 2 provides for the embodiment of the present application is with homophase controlling test protective device frequently and the connection diagram with homophase pilot system frequently;
A kind of GIS same homophase controlling test frequently protective device schematic appearance that Fig. 3 provides for the embodiment of the present application;
The inner theory diagram of a kind of GIS same homophase controlling test frequently protective device that Fig. 4 provides for the embodiment of the present application;
A kind of GIS same homophase controlling test frequently protective device protecting control flow chart that Fig. 5 provides for the embodiment of the present application;
Fig. 6 is frequency plot protecting control flow chart.
Embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.Should be appreciated that preferred embodiment only in order to the present invention is described, instead of in order to limit the scope of the invention.
Embodiment 1
A kind of GIS provided by the invention, with homophase controlling test guard method frequently, comprises the following steps:
S100: obtain reference voltage and test voltage;
S200: the magnitude of voltage of computing reference voltage and test voltage, difference on the frequency and phase difference;
S300: obtain the rated voltage of equipment under test, preset protection definite value;
S400: with reference to voltage and test voltage magnitude of voltage, difference on the frequency and phase difference and preset and protect definite value to compare, the whether action of determination frequency phase protection, high pressure overvoltage protection and high pressure arc protection; If each parameter exceedes preset protection definite value, then corresponding protection act, cuts off the electricity supply; Preset protection definite value if do not exceeded, then protection is failure to actuate;
S500: if discontented foot protection operation condition, then normally work with frequency homophase experimental rig.
Further, the frequency plot in described step S400 protects concrete multilevel iudge to comprise the following steps:
A) when pilot system rated voltage is 110kV:
S401: as test voltage≤60kV, frequency plot protection is failure to actuate;
S402: as test voltage≤100kV and phase difference more than 60 ° time, then frequency plot protection act;
S403: as test voltage > 100kV and phase difference more than 30 ° time, then frequency plot protection act;
B) when pilot system rated voltage is 220kV:
S404: as test voltage≤120kV, frequency plot protection is failure to actuate;
S405: as test voltage≤180kV and phase difference more than 60 ° time, then frequency plot action;
S406: as test voltage > 180kV and phase difference more than 30 ° time, then frequency plot action;
C) when pilot system rated voltage is 500kV:
S407: as test voltage≤148kV, frequency plot protection is failure to actuate;
S408: as test voltage≤237kV and phase difference more than 60 ° time, then frequency plot protection act;
S409: as test voltage > 237kV and phase difference more than 30 ° time, then frequency plot protection act.
Further, the concrete multilevel iudge of described step S400 mesohigh overvoltage protection is further comprising the steps of:
S410: obtain and calculate the real-time test voltage value of each cycle and reference voltage level;
S411: when test voltage exceedes default protection definite value, the action of high pressure overvoltage protection;
S412: when this cycle reference voltage level compares last cycle reference voltage level increment more than 10%, the action of high pressure overvoltage protection;
S413: when isolating switch fracture voltage value, the i.e. phasor difference of test voltage and reference voltage, when exceeding default protection definite value, the action of high pressure overvoltage protection;
S414: when this cycle test voltage value compare last cycle test voltage value increase above 10% time, the action of high pressure overvoltage protection.
Further, the concrete multilevel iudge of described step S400 mesohigh arc protection is further comprising the steps of:
S415: obtain and calculate the real-time test voltage of each cycle and reference voltage level;
S416: when treating examination interval flashover, this test voltage value compare when last cycle test voltage value decreases beyond 10% or this test voltage value lower than default protection definite value time, the action of high pressure arc protection;
S417: when adjacent busbar flashover, this reference voltage level compare when last cycle reference voltage level decreases beyond 10% or this reference voltage level lower than default protection definite value time, the action of high pressure arc protection;
S418: work as flashover, this isolation fracture magnitude of voltage compare when last cycle isolation fracture magnitude of voltage decreases beyond 10% or this test voltage value lower than default protection definite value time, the action of high pressure arc protection.
A kind of GIS provided by the invention, with frequency homophase controlling test protection system, comprising: protection monitoring module, high-tension measurement module, PLL control module and public control module;
Described protection monitoring module, for acquisition test voltage and reference voltage signal, compare both frequency and phase place, and calculate, the whether action of determination frequency phase protection, high pressure overvoltage protection, high pressure arc protection, judges that signal is sent to public control module the most at last;
Described high-tension measurement module, for acquisition test voltage and reference voltage, measures in real time, and measurement data is sent to public control module;
Described PLL control module, for acquisition test voltage and reference voltage, is undertaken, with homophase adjustment frequently, reaching and exporting signal to public control module with after frequency homophase by phase-locked loop.
Described public control module, for accepting the judgement signal protecting monitoring module to export, being sent to frequency homophase power supply by power supply communication optical fiber, controlling mains switch, play a protective role; For accepting the measurement data that high-tension measurement module exports, and data are presented on a display screen by display module; For accepting the same frequency in-phase signal that PLL control module exports, and by same homophase power supply frequently will be sent to frequency in-phase signal with frequency with phase control optical fiber; For accepting input module control signal (voltage up-down, start and stop class), control to realize voltage up-down, start and stop with frequency homophase power supply by power supply communication optical fiber; For accepting input module data-signal (presetting protection definite value class), and send the data to protecting control module for the protection of calculating judgement.
Described protection monitoring module comprises frequency plot protection module, high pressure overvoltage protective module and high pressure arc protection module;
1) described frequency plot protection module detailed process is as follows:
A) when pilot system rated voltage is 110kV:
S401: as test voltage≤60kV, frequency plot protection is failure to actuate;
S402: as test voltage≤100kV and phase difference more than 60 ° time, then frequency plot protection act;
S403: as test voltage > 100kV and phase difference more than 30 ° time, then frequency plot protection act;
B) when pilot system rated voltage is 220kV:
S404: as test voltage≤120kV, frequency plot protection is failure to actuate;
S405: as test voltage≤180kV and phase difference more than 60 ° time, then frequency plot action;
S406: as test voltage > 180kV and phase difference more than 30 ° time, then frequency plot action;
C) when pilot system rated voltage is 500kV:
S407: as test voltage≤148kV, frequency plot protection is failure to actuate;
S408: as test voltage≤237kV and phase difference more than 60 ° time, then frequency plot protection act;
S409: as test voltage > 237kV and phase difference more than 30 ° time, then frequency plot protection act.
2) described high pressure overvoltage protective module detailed process comprises:
S410: obtain and calculate the real-time test voltage value of each cycle and reference voltage level;
S411: when test voltage exceedes default protection definite value, the action of high pressure overvoltage protection;
S412: when this cycle reference voltage level compares last cycle reference voltage level increment more than 10%, the action of high pressure overvoltage protection;
S413: when isolating switch fracture voltage value, the i.e. phasor difference of test voltage and reference voltage, when exceeding default protection definite value, the action of high pressure overvoltage protection;
S414: when this cycle test voltage value compare last cycle test voltage value increase above 10% time, the action of high pressure overvoltage protection.
3) described high pressure arc protection module detailed process comprises:
S415: obtain and calculate the real-time test voltage of each cycle and reference voltage level;
S416: when treating examination interval flashover, this test voltage value compare when last cycle test voltage value decreases beyond 10% or this test voltage value lower than default protection definite value time, the action of high pressure arc protection;
S417: when adjacent busbar flashover, this reference voltage level compare when last cycle reference voltage level decreases beyond 10% or this reference voltage level lower than default protection definite value time, the action of high pressure arc protection;
S418: work as flashover, this isolation fracture magnitude of voltage compare when last cycle isolation fracture magnitude of voltage decreases beyond 10% or this test voltage value lower than default protection definite value time, the action of high pressure arc protection.
Embodiment 2
A kind of GIS same homophase controlling test frequently protective device protecting control flow chart that Fig. 5 provides for the embodiment of the present application, in Fig. 5, GIS comprises with frequency homophase controlling test protective device protecting control flow process:
S100: obtain reference voltage and test voltage;
S200: the magnitude of voltage of computing reference voltage and test voltage, difference on the frequency and phase difference;
S300: obtain the rated voltage of equipment under test, preset protection definite value;
S400: with reference to voltage and test voltage magnitude of voltage, difference on the frequency and phase difference and preset and protect definite value to compare, the whether action of determination frequency phase protection, high pressure overvoltage protection and high pressure arc protection; If each parameter exceedes preset protection definite value, then corresponding protection act, cuts off the electricity supply; Preset protection definite value if do not exceeded, then protection is failure to actuate;
S500: if discontented foot protection operation condition, then normally work with frequency homophase experimental rig.
In this flow chart, step S400 process relates to frequency plot protection, high pressure overvoltage protection and high pressure arc protection, and wherein frequency plot protecting control flow process is as Fig. 6, specifically comprises:
S401: judge reference voltage and test voltage phase difference.S402 is performed when phase difference is greater than 60 °; S403 is performed when phase difference is greater than 30 ° but is less than 60 °; S404 is performed when phase difference is less than 30 °.
When S402: judge rated voltage Un and test voltage value U1, work as Un=110kV, 60kV≤U1≤100kV or Un=220kV, 120kV≤U1≤180kV or Un=500kV, 148kV≤U1≤237kV, frequency plot protection act, carries out step S405; In other cases, step S404 is carried out.
S403: judge rated voltage Un and test voltage value U1, work as Un=110kV, when U1 > 100kV or Un=220kV, U1≤180kV or Un=500kV, U1≤237kV, frequency plot protection act, carries out step S405; In other cases, step S404 is carried out.
S404: protection is failure to actuate.
S405: protection act.
Embodiment 3
A kind of GIS that Fig. 2 provides for the embodiment of the present application is with homophase controlling test protective device frequently and the connection diagram with homophase pilot system frequently.
As shown in Figure 2, comprise with frequency homophase experiment power supply 1, series resonant equipment 2 and voltage divider 3 with frequency homophase pilot system; In figure, top horizontal line represents bus; that be connected with bus is instrument transformer PT; the reference voltage that instrument transformer PT exports is to control protective unit; with homophase experiment power supply is by being connected with control protective unit with power supply connection with frequency homophase control line frequently, test voltage signal is input in control protective unit by voltage divider 23.
Reference voltage input terminal with frequency homophase control protective unit is connected with a low pressure winding of PT, the voltage on the low pressure winding obtaining PT, and by the voltage of acquisition as the reference voltage; Test voltage input with frequency homophase control protective unit is connected with the test lead of voltage divider 3, and voltage output end is connected with the input of series resonant equipment 2.Same frequency in-phase signal output with frequency homophase control protective unit is connected with the same frequency in-phase signal input with frequency homophase power supply 1 by optical fiber, exports and the synchronous signal of reference voltage same frequency; Power supply communication output with frequency homophase control protective unit is connected with the power supply communication input with frequency homophase power supply 1 by optical fiber, exports various Control protection signal.Signal output part with frequently homophase control protective unit is connected with oscillographic signal input part, by the waveform of oscilloscope real-time monitored test voltage and reference voltage.
A kind of GIS same homophase controlling test frequently protective device schematic appearance that Fig. 3 provides for the embodiment of the present application.
In Fig. 3,1.-test voltage signaling interface; 2.-fuse; 3.-reference voltage signal interface; 4.-oscilloscope signal interface CH1, for showing test voltage waveform on oscilloscope; 5.-oscilloscope signal interface CH2, for showing bus working voltage waveform on oscilloscope; 6.-and with frequency homophase control interface, export with frequency in-phase voltage signal; 7.-optical communication interface, out-put supply control signal; 8.-start button; 9.-suddenly stop button; 10.-voltage rises button;
-voltage drop button;
-thickness regulates;
-timing starts;
-mains switch;
-supply socket;
the supply socket of-oscilloscope; Box indicating touch display screen broad in the middle.The parameters such as testing equipment rated voltage, fracture voltage protection value, test voltage protection value are set by touch display screen.Display screen can show test voltage, working voltage, fracture voltage, frequency, phase place equivalence.
The inner theory diagram of a kind of GIS same homophase controlling test frequently protective device that Fig. 4 provides for the embodiment of the present application.
In Fig. 4, GIS same homophase controlling test frequently protective device is by three functional modules: protection monitoring module, high-tension measurement module, PLL control module and a public control module form.Protection monitoring module acquisition test voltage and reference voltage phase place, compare both frequency and phase place, and carry out calculating judgement, judges that signal is sent to public control module the most at last; High-tension measurement module acquires test voltage and reference voltage, measure in real time, and measurement data is sent to public control module; PLL control module acquisition test voltage and reference voltage, undertaken, with homophase adjustment frequently, reaching and exporting signal to public control module with after frequency homophase by phase-locked loop.
Public control module is the control core of package unit.Public control module accepts the judgement signal that protection monitoring module exports, and is sent to frequency homophase power supply, controls mains switch, play a protective role by power supply communication optical fiber; Public control module accepts the measurement data that high-tension measurement module exports, and data is presented on a display screen by display module; Public control module accepts the same frequency in-phase signal that PLL control module exports, and by same homophase power supply frequently will be sent to frequency in-phase signal with frequency with phase control optical fiber.Public control module accepts input module control signal (voltage up-down, start and stop class), controls to realize voltage up-down, start and stop with frequency homophase power supply by power supply communication optical fiber; Public control module accepts input module data-signal (protection definite value class), and sends the data to protecting control module for the protection of calculating judgement.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by referring to the preferred embodiments of the present invention, invention has been described, but those of ordinary skill in the art is to be understood that, various change can be made to it in the form and details, and not depart from the spirit and scope that the present invention limits.
Claims (6)
1. GIS is with a frequency homophase AC voltage withstand test Control protection method, it is characterized in that: comprise the following steps:
S100: obtain reference voltage and test voltage;
S200: the magnitude of voltage of computing reference voltage and test voltage, difference on the frequency and phase difference;
S300: obtain the rated voltage of equipment under test, preset protection definite value;
S400: with reference to voltage and test voltage magnitude of voltage, difference on the frequency and phase difference and preset and protect definite value to compare, the whether action of determination frequency phase protection, high pressure overvoltage protection and high pressure arc protection; If each parameter exceedes preset protection definite value, then corresponding protection act, cuts off the electricity supply; Preset protection definite value if do not exceeded, then protection is failure to actuate;
S500: if discontented foot protection operation condition, then normally work with frequency homophase experimental rig.
2. GIS according to claim 1 is with frequency homophase AC voltage withstand test Control protection method, it is characterized in that: the frequency plot in described step S400 protects concrete multilevel iudge process as follows:
A) when pilot system rated voltage is 110kV:
S401: as test voltage≤60kV, frequency plot protection is failure to actuate;
S402: as test voltage≤100kV and phase difference more than 60 ° time, then frequency plot protection act;
S403: as test voltage > 100kV and phase difference more than 30 ° time, then frequency plot protection act;
B) when pilot system rated voltage is 220kV:
S404: as test voltage≤120kV, frequency plot protection is failure to actuate;
S405: as test voltage≤180kV and phase difference more than 60 ° time, then frequency plot action;
S406: as test voltage > 180kV and phase difference more than 30 ° time, then frequency plot action;
C) when pilot system rated voltage is 500kV:
S407: as test voltage≤148kV, frequency plot protection is failure to actuate;
S408: as test voltage≤237kV and phase difference more than 60 ° time, then frequency plot protection act;
S409: as test voltage > 237kV and phase difference more than 30 ° time, then frequency plot protection act.
3. GIS according to claim 1 is with frequency homophase AC voltage withstand test Control protection method, it is characterized in that: described step S400 mesohigh overvoltage protection concrete multilevel iudge process is as follows:
S410: obtain and calculate the real-time test voltage value of each cycle and reference voltage level;
S411: when test voltage exceedes default protection definite value, the action of high pressure overvoltage protection;
S412: when this cycle reference voltage level compares last cycle reference voltage level increment more than 10%, the action of high pressure overvoltage protection;
S413: when isolating switch fracture voltage value, the i.e. phasor difference of test voltage and reference voltage, when exceeding default protection definite value, the action of high pressure overvoltage protection;
S414: when this cycle test voltage value compare last cycle test voltage value increase above 10% time, the action of high pressure overvoltage protection.
4. GIS according to claim 1 is with frequency homophase AC voltage withstand test Control protection method, it is characterized in that: described step S400 mesohigh arc protection concrete multilevel iudge process is as follows:
S415: obtain and calculate the real-time test voltage of each cycle and reference voltage level;
S416: when treating examination interval flashover, this test voltage value compare when last cycle test voltage value decreases beyond 10% or this test voltage value lower than default protection definite value time, the action of high pressure arc protection;
S417: when adjacent busbar flashover, this reference voltage level compare when last cycle reference voltage level decreases beyond 10% or this reference voltage level lower than default protection definite value time, the action of high pressure arc protection;
S418: work as flashover, this isolation fracture magnitude of voltage compare when last cycle isolation fracture magnitude of voltage decreases beyond 10% or this test voltage value lower than default protection definite value time, the action of high pressure arc protection.
5. GIS is with a frequency homophase AC voltage withstand test Control protection system, it is characterized in that: comprise protection monitoring module, high-tension measurement module, PLL control module and public control module;
Described protection monitoring module, for acquisition test voltage and reference voltage signal, compare both frequency and phase place, and calculate, the whether action of determination frequency phase protection, high pressure overvoltage protection, high pressure arc protection, judges that signal is sent to public control module the most at last;
Described high-tension measurement module, for acquisition test voltage and reference voltage, measures in real time, and measurement data is sent to public control module;
Described PLL control module, for acquisition test voltage and reference voltage, is undertaken, with homophase adjustment frequently, reaching and exporting signal to public control module with after frequency homophase by phase-locked loop;
Described public control module, for accepting the judgement signal protecting monitoring module to export, being sent to frequency homophase power supply by power supply communication optical fiber, controlling mains switch; For accepting the measurement data that high-tension measurement module exports, and data are presented on a display screen by display module; For accepting the same frequency in-phase signal that PLL control module exports, and by same homophase power supply frequently will be sent to frequency in-phase signal with frequency with phase control optical fiber; For accepting input module control signal; Described control signal comprises voltage up-down start and stop class signal, controls to realize voltage up-down, start and stop with frequency homophase power supply by power supply communication optical fiber; For accepting input module data-signal, described data-signal for presetting protection definite value class signal, and sends the data to protecting control module for the protection of calculating judgement.
6. GIS according to claim 5 is with frequency homophase controlling test protection system, it is characterized in that: described protection monitoring module comprises frequency plot protection module, high pressure overvoltage protective module and high pressure arc protection module;
1) described frequency plot protection module detailed process is as follows:
A) when pilot system rated voltage is 110kV:
S401: as test voltage≤60kV, frequency plot protection is failure to actuate;
S402: as test voltage≤100kV and phase difference more than 60 ° time, then frequency plot protection act;
S403: as test voltage > 100kV and phase difference more than 30 ° time, then frequency plot protection act;
B) when pilot system rated voltage is 220kV:
S404: as test voltage≤120kV, frequency plot protection is failure to actuate;
S405: as test voltage≤180kV and phase difference more than 60 ° time, then frequency plot action;
S406: as test voltage > 180kV and phase difference more than 30 ° time, then frequency plot action;
C) when pilot system rated voltage is 500kV:
S407: as test voltage≤148kV, frequency plot protection is failure to actuate;
S408: as test voltage≤237kV and phase difference more than 60 ° time, then frequency plot protection act;
S409: as test voltage > 237kV and phase difference more than 30 ° time, then frequency plot protection act;
2) described high pressure overvoltage protective module detailed process comprises:
S410: obtain and calculate the real-time test voltage value of each cycle and reference voltage level;
S411: when test voltage exceedes default protection definite value, the action of high pressure overvoltage protection;
S412: when this cycle reference voltage level compares last cycle reference voltage level increment more than 10%, the action of high pressure overvoltage protection;
S413: when isolating switch fracture voltage value, the i.e. phasor difference of test voltage and reference voltage, when exceeding default protection definite value, the action of high pressure overvoltage protection;
S414: when this cycle test voltage value compare last cycle test voltage value increase above 10% time, the action of high pressure overvoltage protection;
3) described high pressure arc protection module detailed process comprises:
S415: obtain and calculate the real-time test voltage of each cycle and reference voltage level;
S416: when treating examination interval flashover, this test voltage value compare when last cycle test voltage value decreases beyond 10% or this test voltage value lower than default protection definite value time, the action of high pressure arc protection;
S417: when adjacent busbar flashover, this reference voltage level compare when last cycle reference voltage level decreases beyond 10% or this reference voltage level lower than default protection definite value time, the action of high pressure arc protection;
S418: work as flashover, this isolation fracture magnitude of voltage compare when last cycle isolation fracture magnitude of voltage decreases beyond 10% or this test voltage value lower than default protection definite value time, the action of high pressure arc protection.
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Cited By (7)
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| CN105388440A (en) * | 2015-11-09 | 2016-03-09 | 国网重庆市电力公司电力科学研究院 | Method for verifying reliability of common-frequency in-phase alternating-current voltage-withstanding testing apparatus of GIS |
| CN105974280A (en) * | 2016-05-09 | 2016-09-28 | 国网重庆市电力公司电力科学研究院 | GIS voltage holding test device |
| CN105974282A (en) * | 2016-05-09 | 2016-09-28 | 国网重庆市电力公司电力科学研究院 | GIS voltage holding test method |
| CN109932623A (en) * | 2019-03-25 | 2019-06-25 | 重庆大学 | Test method is mutually exchanged with frequently same with the GIS of phase-shifting transformer based on phase matched combination |
| CN110133494A (en) * | 2019-06-05 | 2019-08-16 | 国网江苏省电力有限公司苏州供电分公司 | Industrial frequency AC Withstand test device |
| CN111596246A (en) * | 2019-02-20 | 2020-08-28 | 国网冀北电力有限公司 | Same-frequency same-phase calibration device and calibration method thereof |
| AU2020239815B2 (en) * | 2019-11-13 | 2021-09-09 | Shanghai Goalsee Electric Technology Co., Ltd. | A device for improving tuning stability of series resonance under small load |
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| CN105388440A (en) * | 2015-11-09 | 2016-03-09 | 国网重庆市电力公司电力科学研究院 | Method for verifying reliability of common-frequency in-phase alternating-current voltage-withstanding testing apparatus of GIS |
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| CN105974282A (en) * | 2016-05-09 | 2016-09-28 | 国网重庆市电力公司电力科学研究院 | GIS voltage holding test method |
| CN111596246A (en) * | 2019-02-20 | 2020-08-28 | 国网冀北电力有限公司 | Same-frequency same-phase calibration device and calibration method thereof |
| CN109932623A (en) * | 2019-03-25 | 2019-06-25 | 重庆大学 | Test method is mutually exchanged with frequently same with the GIS of phase-shifting transformer based on phase matched combination |
| CN109932623B (en) * | 2019-03-25 | 2021-06-08 | 重庆大学 | GIS same-frequency and same-phase test method based on phase matching combination and phase-shifting transformer |
| CN110133494A (en) * | 2019-06-05 | 2019-08-16 | 国网江苏省电力有限公司苏州供电分公司 | Industrial frequency AC Withstand test device |
| AU2020239815B2 (en) * | 2019-11-13 | 2021-09-09 | Shanghai Goalsee Electric Technology Co., Ltd. | A device for improving tuning stability of series resonance under small load |
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