CN105978014B - Parallel inverter direct current transportation interior communication descends failure locking method extremely - Google Patents
Parallel inverter direct current transportation interior communication descends failure locking method extremely Download PDFInfo
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- CN105978014B CN105978014B CN201610403110.1A CN201610403110A CN105978014B CN 105978014 B CN105978014 B CN 105978014B CN 201610403110 A CN201610403110 A CN 201610403110A CN 105978014 B CN105978014 B CN 105978014B
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Abstract
The present invention discloses a kind of parallel inverter direct current transportation interior communication and descends failure locking method extremely, determine that remaining sane system is to continue with operation according to following 3 kinds of factors, or locking is stopped transport, and the size of power or current values that remaining sane system continues to run with：(1) size of power or running current is run before pole power control mode or Inverter circuit control model, (2) converting plant failure locking transverter or Inverter Station failure locking transverter, and (3) failure.Such method can when single transverter because failure or stop transport because of operation plan locking after, realize the demand that remaining transmission system continues to run with or the demand that safety interlocking is stopped transport.
Description
Technical field
The present invention relates to a kind of parallel inverter direct current transportation interior communications to descend failure locking method extremely, suitable for being based on
High pressure/extra-high voltage DC transmission system of thyristor single control device.
Background technology
High pressure/extra-high voltage direct-current transmission has the characteristics that power Transmission power is big, distance is remote, direction of tide is easy to control.It is special
D.C. high voltage transmission uses double converter series system at present, realizes that vast capacity conveys electric energy, there is multiple practical engineering applications；
Using double converter parallel way (also known as " valve group in parallel "), vast capacity conveying electric energy equally may be implemented, but currently without
Practical engineering application.
Multi-terminal HVDC transmission can realize that multiple feed, more drop points by electricity, become a developing direction of direct current transportation.
Parallel connection type multiterminal element has several practical application engineerings in foreign countries；The technical characterstic of parallel inverter direct current transportation mode is equivalent to
Parallel connection type in multi-terminal HVDC transmission topological structure, by two current conversion stations of parallel connection type multiterminal element merge a current conversion station it
It is interior.
Fig. 1 is parallel inverter DC transmission system structure chart.Parallel inverter direct-current power transmission control protection system is completed
Parallel inverter direct current transportation power conveys and the functions such as equipment protection, including：System startup, system shutdown, transmission power
It adjusts, each equipment investment/exit control etc..Defencive function is controlled in order to preferably complete parallel inverter direct current transportation, two
Interior communication channel is established between a current conversion station, coordinates the various operations of two current conversion stations.
A generic operation therein is, single transverter is because of failure or locking of stopping transport because of operation plan.Interior communication channel
When normal, single transverter stoppage in transit locking information can be notified another current conversion station by Control protection system, and will be remaining, strong
The power (electric current) that complete, in parallel transverter can be run notifies another current conversion station；In this way, remaining transmission system can be kept
It continues to run with.
But if when interior communication channel abnormal, any information can not notify another to change by interior communication channel
Stream station, single transverter (converting plant or Inverter Station) after failure or locking of stopping transport because of operation plan, can cause converting plant and
The unbalanced power of Inverter Station.When converting plant power is more than Inverter Station, and the straight-flow system method of operation does not allow to automatically adjust
When, it will cause Inverter Station transverter overload or DC voltage overvoltages；When Inverter Station power is more than converting plant, and direct current system
When the system method of operation does not allow to automatically adjust or can not adjust, it will cause Inverter Station transverters to be less than minimum power or direct current
Voltage reduces.So, single transverter is after failure or locking of stopping transport because of operation plan, how to keep remaining transmission system after
Reforwarding rowThe present invention will propose method, solve the problems, such as this.
Invention content
The purpose of the present invention is to provide a kind of parallel inverter direct current transportation interior communication and descends failure locking side extremely
Method, can when single transverter because failure or stop transport because of operation plan locking after, realize that remaining transmission system continues to run with
Demand or safety interlocking stop transport demand.
In order to achieve the above objectives, solution of the invention is：
A kind of parallel inverter direct current transportation interior communication descends failure locking method extremely, is determined according to following 3 kinds of factors
Remaining sane system is to continue with operation, or stops transport locking, and the power that continues to run with of remaining sane system or current values
Size：(1) pole power control mode or Inverter circuit control model, (2) converting plant failure locking transverter or inversion
Station failure is latched the size of operation power or running current before transverter, and (3) failure.
Converting plant and Inverter Station parallel inverter are operated in pole power control mode, converting plant failure locking transverter,
At this point, remaining sane system continues to run with, the power that remaining sane system continues to run with perfects in parallel no more than converting plant
In the case of the capability of overload operation of transverter, pole power is constant before keeping failure.
Converting plant and Inverter Station parallel inverter are operated in pole power control mode, Inverter Station failure locking transverter,
At this point, if pole power is no more than the capability of overload for perfecting transverter of Inverter Station parallel connection, remaining sane system before failure
It continues to run with, pole power is constant before remaining sane system keeps failure；If pole power is more than the strong of Inverter Station parallel connection before failure
The capability of overload of full transverter, then locking Inverter Station parallel connection of stopping transport perfect transverter.
Converting plant parallel inverter one is operated in pole power control mode, another to be operated in Inverter circuit control mould
Formula, converting plant failure locking are operated in the transverter of Inverter circuit control model, at this point, remaining sane system continues to run with,
Feelings of the power that remaining sane system continues to run in the capability of overload operation that perfects transverter in parallel no more than converting plant
Under condition, pole power is constant before keeping failure.
Converting plant parallel inverter one is operated in pole power control mode, another to be operated in Inverter circuit control mould
Formula, converting plant failure locking are operated in the transverter of pole power control mode, at this point, if converting plant parallel connection is operated in the change of current
The transverter running current that perfects of device current control mode is more than or equal to 0.2 times of rated current, then remaining sane system is after reforwarding
It goes, the electric current that Inverter circuit control model is operated in before the electric current holding failure that remaining sane system continues to run with is constant；Such as
The fruit converting plant transverter running current that perfects for being operated in Inverter circuit control model in parallel is less than 0.2 times of rated current,
Then stop transport locking converting plant it is in parallel perfect transverter.
Inverter Station parallel inverter one is operated in pole power control mode, another to be operated in Inverter circuit control mould
Formula, Inverter Station failure locking are operated in the transverter of Inverter circuit control model, at this point, if pole power is no more than before failure
The capability of overload for perfecting transverter of Inverter Station parallel connection, then remaining sane system continue to run with, remaining sane system keep therefore
It is constant to hinder preceding pole power；If pole power is more than the capability of overload for perfecting transverter of Inverter Station parallel connection before failure, stop transport
Locking Inverter Station parallel connection perfects transverter.
Inverter Station parallel inverter one is operated in pole power control mode, another to be operated in Inverter circuit control mould
Formula, Inverter Station failure locking are operated in the transverter of pole power control mode, at this point, sound the changing for locking Inverter Station parallel connection of stopping transport
Flow device.
Converting plant parallel inverter is operated in Inverter circuit control model, converting plant failure locking transverter, at this point,
If the converting plant transverter running current that perfects in parallel is more than or equal to 0.2 times of rated current, remaining sane system is after reforwarding
Row, the electric current perfected before converter fault that electric current that remaining sane system continues to run with keeps converting plant in parallel are constant；If
The converting plant transverter running current that perfects in parallel is less than 0.2 times of rated current, then sound the changing for locking converting plant parallel connection of stopping transport
Flow device.
Inverter Station parallel inverter is operated in Inverter circuit control model, Inverter Station failure locking transverter, at this point,
Stoppage in transit locking Inverter Station parallel connection perfects transverter.
After adopting the above scheme, the present invention proposes a kind of failure locking method, when single transverter is because of failure or because adjusting
Degree is planned after locking of stopping transport, and realizes the demand for the demand or safety interlocking stoppage in transit that remaining transmission system continues to run with.
Description of the drawings
Fig. 1 is the parallel inverter DC transmission system Organization Chart that the present invention is applied；
Fig. 2 is the general flow chart of the present invention.
Specific implementation mode
Below with reference to attached drawing, technical scheme of the present invention is described in detail.
Knowledge related to the technical solution of the present invention is introduced first.
Fig. 1 is typical parallel inverter DC transmission system figure：It is made of converting plant, Inverter Station and DC line,
In, converting plant, Inverter Station are also known as current conversion station.Bipolar direct current transmission system is made of pole I and pole II.Parallel inverter direct current transportation
The current conversion station of system is made of two transverters in parallel, as Tu1Zhong converting plants pole I " parallel inverter 1 " and " parallel connection is changed
Flow device 2 ".The pole I of converting plant and Inverter Station, pole II are made of two transverters in parallel.
Converting plant and the parallel inverter of Inverter Station have following two working methods：
Pole power control mode：Control targe keeps pole power invariability as far as possible.Here refer to not surpassing " as far as possible "
In the case of the capability of overload operation for crossing transverter.In two-in-parallel transverter DC transmission system, pole power is by two parallel connections
Converter power is added and obtains.When one of parallel inverter power changes, another parallel inverter is controlled
Power so that pole power constant.Here, overload energy of the power limited in transverter of another parallel inverter is controlled
Power：When another parallel inverter power of control is more than the capability of overload of transverter, another parallel inverter power
Equal to the overload power level of transverter, pole power is caused to be less than setting value.
Inverter circuit control model：It controls transverter running current and is no more than setting value.Since transverter is related, connected
Component existing defects, such as：Cooling water pump power dropping etc. causes transverter heat-sinking capability to decline, to limit transverter
Running current, no more than setting value.
A kind of parallel inverter direct current transportation interior communication of the present invention descends failure locking method extremely, be consider it is following
Several factors：
(1) pole power control mode or Inverter circuit control model, (2) converting plant failure locking transverter or inversion
Station failure is latched transverter, and the size of power (or running current) is run before (3) failure；
It determines that remaining sane system is to continue with operation, or stops transport and be latched, power that remaining sane system continues to run with (or
Electric current) numerical value size.
It is the flow chart that the present invention realizes shown in Fig. 2.How according to above several factors controlled and Fig. 2 in " side
The function that method realization module " is completed, will be described in detail in conjunction with specific embodiments.
The first situation：Converting plant and Inverter Station parallel inverter are operated in pole power control mode, rectification station failure
It is latched transverter, at this point, remaining sane system continues to run with, the power that remaining sane system continues to run with is no more than converting plant
In the case of the capability of overload operation for perfecting transverter in parallel, pole power is constant before keeping failure.
Embodiment 1：Two converting plant, Inverter Station pole I transverters are all made of pole power control mode operation, rated power
1500MW, operation power 1500MW；Single transverter overload power 825MW.Interior communication is abnormal, the converting plant " change of current in parallel
1 " failure of device, locking are stopped transport.So, remaining sane system is (by " parallel inverter 2 " of converting plant pole I, with Inverter Station pole I's
The system of two parallel inverters composition) it continues to run with, it is in parallel that the power that remaining sane system continues to run with is no more than converting plant
The capability of overload for perfecting transverter, operation power be 825MW.
Embodiment 2：Two converting plant, Inverter Station pole I transverters are all made of pole power control mode operation, rated power
1500MW, operation power 700MW；Single transverter overload power 825MW.Interior communication is abnormal, converting plant " parallel inverter
1 " failure, locking are stopped transport.So, remaining sane system (by " parallel inverter 2 " of converting plant pole I, two with Inverter Station pole I
The system of a parallel inverter composition) it continues to run with, since power 700MW perfects the change of current no more than converting plant parallel connection before failure
The power 825MW of the capability of overload of device, remaining sane system keep power 700MW operations before failure.
The second situation：Converting plant and Inverter Station parallel inverter are operated in pole power control mode, inversion station failure
It is latched transverter, at this point, if pole power is no more than the capability of overload for perfecting transverter of Inverter Station parallel connection before failure, is remained
Remaining sane system continues to run with, and pole power is constant before remaining sane system keeps failure；If pole power is more than inversion before failure
Stand the capability of overload for perfecting transverter in parallel, then locking Inverter Station of stopping transport it is in parallel perfect transverter.
Embodiment 3：Two converting plant, Inverter Station pole I transverters are all made of pole power control mode operation, rated power
1500MW, operation power 1500MW；Single transverter overload power 825MW.Interior communication is abnormal, the Inverter Station " change of current in parallel
1 " failure of device, locking are stopped transport.So, due to before failure pole power 1500MW be more than Inverter Station it is in parallel perfect the excessively negative of transverter
Lotus capable power 825MW, then locking Inverter Station parallel connection of stopping transport perfect transverter (i.e. Inverter Station " parallel inverter 2 ").
Embodiment 4：Two converting plant, Inverter Station pole I transverters are all made of pole power control mode operation, rated power
1500MW, operation power 700MW；Single transverter overload power 825MW.Interior communication is abnormal, Inverter Station " parallel inverter
1 " failure, locking are stopped transport.So, remaining sane system is (by two parallel inverters of converting plant pole I, with Inverter Station pole I's
The system of " parallel inverter 2 " composition) it continues to run with, since power 700MW is no more than sound the changing of Inverter Station parallel connection before failure
The power 825MW of the capability of overload of device is flowed, remaining sane system keeps power 700MW operations before failure.
The third situation：Converting plant parallel inverter one is operated in pole power control mode, another to be operated in transverter
Current control mode, converting plant failure locking are operated in the transverter of Inverter circuit control model, at this point, remaining sane system
It continues to run with, the power that remaining sane system continues to run with is in the capability of overload for perfecting transverter no more than converting plant parallel connection
In the case of operation, pole power is constant before keeping failure.
Embodiment 5：Converting plant pole I " parallel inverter 1 " is run using pole power control mode, and " parallel inverter 2 " is adopted
With Inverter circuit control model, rated power 1500MW, rated direct voltage ± 500kV；" parallel inverter 1 " pole power control
It sets up and sets power 1250MW, " parallel inverter 2 " running current 1000A；Single transverter overload power 825MW.Lead between standing
Letter is abnormal, converting plant " parallel inverter 2 " failure, and locking is stopped transport.So, remaining sane system is (by the " in parallel of converting plant pole I
Transverter 1 ", the system formed with two parallel inverters of Inverter Station pole I) it continues to run with, remaining sane system continues to run with
Power be no more than converting plant parallel connection the capability of overload for perfecting transverter, operation power be 825MW.
Embodiment 6：Converting plant pole I " parallel inverter 1 " is run using pole power control mode, and " parallel inverter 2 " is adopted
With Inverter circuit control model, rated power 1500MW, rated direct voltage ± 500kV；" parallel inverter 1 " pole power control
It sets up and sets power 700MW, " parallel inverter 2 " running current 600A；Single transverter overload power 825MW.Interior communication
Abnormal, converting plant " parallel inverter 2 " failure, locking is stopped transport.So, remaining sane system (by converting plant pole I " parallel connection is changed
Device 1 " is flowed, the system formed with two parallel inverters of Inverter Station pole I) it continues to run with, since power 700MW does not surpass before failure
The power 825MW of the capability of overload for perfecting transverter of over commutation station parallel connection, remaining sane system keep power before failure
700MW is run.
4th kind of situation：Converting plant parallel inverter one is operated in pole power control mode, another to be operated in transverter
Current control mode, converting plant failure locking are operated in the transverter of pole power control mode, at this point, if converting plant is in parallel
The transverter running current that perfects for being operated in Inverter circuit control model is more than or equal to 0.2 times of rated current, then remaining sound
System continues to run with, and the electricity of Inverter circuit control model is operated in before the electric current holding failure that remaining sane system continues to run with
It flows constant；If the converting plant transverter running current that perfects for being operated in Inverter circuit control model in parallel is less than 0.2 times
Rated current, then locking converting plant parallel connection of stopping transport perfect transverter.
Embodiment 7：Converting plant pole I " parallel inverter 1 " is run using pole power control mode, and " parallel inverter 2 " is adopted
With Inverter circuit control model, rated power 1500MW, rated direct voltage ± 500kV；" parallel inverter 1 " pole power control
It sets up and sets power 1250MW, " parallel inverter 2 " running current 1000A；Single transverter overload power 825MW.Lead between standing
Letter is abnormal, converting plant " parallel inverter 1 " failure, and locking is stopped transport.So, remaining sane system is (by the " in parallel of converting plant pole I
The system of two parallel inverters composition of transverter 2 " and Inverter Station pole I) it continues to run with." parallel inverter 2 " is worked in and is changed
Device current control mode is flowed, running current 1000A is more than 0.2 times of rated current (0.2*1500A=300A), remaining sane system
Operation power is 500MW (=500kV*1000A).
Embodiment 8：Converting plant pole I " parallel inverter 1 " is run using pole power control mode, and " parallel inverter 2 " is adopted
With Inverter circuit control model, rated power 1500MW, rated direct voltage ± 500kV；" parallel inverter 1 " pole power control
It sets up and sets power 700MW, " parallel inverter 2 " running current 200A；Single transverter overload power 825MW.Interior communication
Abnormal, converting plant " parallel inverter 1 " failure, locking is stopped transport.So, since " parallel inverter 2 " is operated in Inverter circuit
Control model, running current 200A are less than 0.2 times of rated current (0.2*1500A=300A), then the locking converting plant that stops transport is in parallel
Perfect transverter (i.e. converting plant " parallel inverter 2 ").
5th kind of situation：Inverter Station parallel inverter one is operated in pole power control mode, another to be operated in transverter
Current control mode, Inverter Station failure locking are operated in the transverter of Inverter circuit control model, at this point, if pole before failure
Power is no more than the capability of overload for perfecting transverter of Inverter Station parallel connection, then remaining sane system continues to run with, and residue is sound
Pole power is constant before system keeps failure；If pole power is more than the overload energy for perfecting transverter of Inverter Station parallel connection before failure
Power, then locking Inverter Station parallel connection of stopping transport perfect transverter.
Embodiment 9：Inverter Station pole I " parallel inverter 1 " is run using pole power control mode, and " parallel inverter 2 " is adopted
With Inverter circuit control model, rated power 1500MW, rated direct voltage ± 500kV；" parallel inverter 1 " pole power control
It sets up and sets power 1250MW, " parallel inverter 2 " running current 1000A；Single transverter overload power 825MW.Lead between standing
Letter is abnormal, Inverter Station " parallel inverter 2 " failure, and locking is stopped transport.So, due to pole power control setting power before failure
1250MW is more than the power 825MW of the capability of overload for perfecting transverter of Inverter Station parallel connection, then locking Inverter Station of stopping transport is in parallel
Perfect transverter (i.e. Inverter Station " parallel inverter 1 ").
Embodiment 10：Inverter Station pole I " parallel inverter 1 " is run using pole power control mode, and " parallel inverter 2 " is adopted
With Inverter circuit control model, rated power 1500MW, rated direct voltage ± 500kV；" parallel inverter 1 " pole power control
It sets up and sets power 800MW, " parallel inverter 2 " running current 600A；Single transverter overload power 825MW.Interior communication
Abnormal, Inverter Station " parallel inverter 2 " failure, locking is stopped transport.So, remaining sane system continues to run with.Due to pole before failure
Power control setting power 800MW is not above the power 825MW of the capability of overload for perfecting transverter of Inverter Station parallel connection, then
Pole power 800MW is run before remaining sane system keeps failure.
6th kind of situation：Inverter Station parallel inverter one is operated in pole power control mode, another to be operated in transverter
Current control mode, Inverter Station failure locking are operated in the transverter of pole power control mode, at this point, stopping transport locking Inverter Station simultaneously
Connection perfects transverter.
Embodiment 11：Inverter Station pole I " parallel inverter 1 " is run using pole power control mode, and " parallel inverter 2 " is adopted
With Inverter circuit control model, rated power 1500MW, rated direct voltage ± 500kV；" parallel inverter 1 " pole power control
It sets up and sets power 1250MW, " parallel inverter 2 " running current 1000A；Single transverter overload power 825MW.Lead between standing
Letter is abnormal, Inverter Station " parallel inverter 1 " failure, and locking is stopped transport.So, what stoppage in transit locking Inverter Station was in parallel perfects transverter
(i.e. Inverter Station " parallel inverter 2 ").
7th kind of situation：Converting plant parallel inverter is operated in Inverter circuit control model, converting plant failure locking
Transverter, at this point, if the transverter running current that perfects of converting plant parallel connection is more than or equal to 0.2 times of rated current, residue is strong
Total system continues to run with, and the electric current that remaining sane system continues to run with keeps the electricity of converting plant parallel connection perfected before converter fault
It flows constant；If the converting plant transverter running current that perfects in parallel is less than 0.2 times of rated current, locking converting plant is stopped transport simultaneously
Connection perfects transverter.
Embodiment 12：Two transverters of converting plant pole I are operated in Inverter circuit control model, rated power
1500MW, rated direct voltage ± 500kV；" parallel inverter 1 " running current 750A, " parallel inverter 2 " running current
400A；Single transverter overload power 825MW.Interior communication is abnormal, converting plant " parallel inverter 1 " failure, and locking is stopped transport.
So, remaining sane system (is made of " parallel inverter 2 " of converting plant pole I and two parallel inverters of Inverter Station pole I
System) it continues to run with." parallel inverter 2 " works in Inverter circuit control model, and running current 400A is specified more than 0.2 times
Electric current (0.2*1500A=300A), remaining sane system operation power is 200MW (=500kV*400A).
Embodiment 13：Two transverters of converting plant pole I are operated in Inverter circuit control model, rated power
1500MW, rated direct voltage ± 500kV；" parallel inverter 1 " running current 750A, " parallel inverter 2 " running current
200A；Single transverter overload power 825MW.Interior communication is abnormal, converting plant " parallel inverter 1 " failure, and locking is stopped transport.
So, since " parallel inverter 2 " is operated in Inverter circuit control model, running current 200A is less than 0.2 times of rated current
(0.2*1500A=300A), then locking converting plant parallel connection of stopping transport perfect transverter (i.e. converting plant " parallel inverter 2 ").
8th kind of situation：Inverter Station parallel inverter is operated in Inverter circuit control model, Inverter Station failure locking
Transverter, at this point, locking Inverter Station parallel connection of stopping transport perfects transverter.
Embodiment 14：Two transverters of Inverter Station pole I " parallel inverter 1 " are operated in Inverter circuit control model,
Rated power 1500MW, rated direct voltage ± 500kV；" parallel inverter 1 " running current 600A, " parallel inverter 2 " fortune
Row electric current 1000A；Single transverter overload power 825MW.Interior communication is abnormal, and Inverter Station " parallel inverter 1 " failure is closed
Locking is transported.So, what stoppage in transit locking Inverter Station was in parallel perfects transverter (i.e. Inverter Station " parallel inverter 2 ").
Above example is merely illustrative of the invention's technical idea, and protection scope of the present invention cannot be limited with this, every
According to technological thought proposed by the present invention, any change done on the basis of technical solution each falls within the scope of the present invention
Within.
Claims (1)
1. a kind of parallel inverter direct current transportation interior communication descends failure locking method extremely, it is characterised in that：According to following 3 kinds
Factor determines that remaining sane system is to continue with operation, or stops transport locking, and the power that continues to run with of residue sane system or
The size of current values：(1) pole power control mode or Inverter circuit control model, the failure locking change of current of (2) converting plant
The size of power or running current is run before device or Inverter Station failure locking transverter, and (3) failure；It specifically includes as follows
Several situations：
First, converting plant and Inverter Station parallel inverter are operated in pole power control mode, converting plant failure locking transverter,
At this point, remaining sane system continues to run with, the power that remaining sane system continues to run with perfects in parallel no more than converting plant
In the case of the capability of overload of transverter, pole power is constant before keeping failure；
Second, converting plant and Inverter Station parallel inverter are operated in pole power control mode, Inverter Station failure locking transverter,
At this point, if pole power is no more than the capability of overload for perfecting transverter of Inverter Station parallel connection, remaining sane system before failure
It continues to run with, pole power is constant before remaining sane system keeps failure；If pole power is more than the strong of Inverter Station parallel connection before failure
The capability of overload of full transverter, then locking Inverter Station parallel connection of stopping transport perfect transverter；
Third, converting plant parallel inverter one is operated in pole power control mode, another to be operated in Inverter circuit control mould
Formula, converting plant failure locking are operated in the transverter of Inverter circuit control model, at this point, remaining sane system continues to run with,
The power that remaining sane system continues to run with no more than the capability of overload for perfecting transverter of converting plant parallel connection,
Pole power is constant before keeping failure；
4th, converting plant parallel inverter one is operated in pole power control mode, another to be operated in Inverter circuit control mould
Formula, converting plant failure locking are operated in the transverter of pole power control mode, at this point, if converting plant parallel connection is operated in the change of current
The transverter running current that perfects of device current control mode is more than or equal to 0.2 times of rated current, then remaining sane system is after reforwarding
It goes, the electric current that Inverter circuit control model is operated in before the electric current holding failure that remaining sane system continues to run with is constant；Such as
The fruit converting plant transverter running current that perfects for being operated in Inverter circuit control model in parallel is less than 0.2 times of rated current,
Then stop transport locking converting plant it is in parallel perfect transverter；
5th, Inverter Station parallel inverter one is operated in pole power control mode, another to be operated in Inverter circuit control mould
Formula, Inverter Station failure locking are operated in the transverter of Inverter circuit control model, at this point, if pole power is no more than before failure
The capability of overload for perfecting transverter of Inverter Station parallel connection, then remaining sane system continue to run with, remaining sane system keep therefore
It is constant to hinder preceding pole power；If pole power is more than the capability of overload for perfecting transverter of Inverter Station parallel connection before failure, stop transport
Locking Inverter Station parallel connection perfects transverter；
6th, Inverter Station parallel inverter one is operated in pole power control mode, another to be operated in Inverter circuit control mould
Formula, Inverter Station failure locking are operated in the transverter of pole power control mode, at this point, sound the changing for locking Inverter Station parallel connection of stopping transport
Flow device；
7th, converting plant parallel inverter is operated in Inverter circuit control model, converting plant failure locking transverter, this
When, if the transverter running current that perfects of converting plant parallel connection is more than or equal to 0.2 times of rated current, remaining sane system continues
Operation, the electric current perfected before converter fault that electric current that remaining sane system continues to run with keeps converting plant in parallel are constant；Such as
The fruit converting plant transverter running current that perfects in parallel is less than 0.2 times of rated current, then the locking converting plant that stops transport is in parallel to be perfected
Transverter；
8th, Inverter Station parallel inverter is operated in Inverter circuit control model, Inverter Station failure locking transverter, this
When, locking Inverter Station parallel connection of stopping transport perfects transverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610403110.1A CN105978014B (en) | 2016-06-08 | 2016-06-08 | Parallel inverter direct current transportation interior communication descends failure locking method extremely |
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| CN201610403110.1A CN105978014B (en) | 2016-06-08 | 2016-06-08 | Parallel inverter direct current transportation interior communication descends failure locking method extremely |
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| CN105978014A CN105978014A (en) | 2016-09-28 |
| CN105978014B true CN105978014B (en) | 2018-09-28 |
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| CN108418237B (en) * | 2018-03-05 | 2021-11-12 | 南京南瑞继保电气有限公司 | Method and device for controlling inter-station communication fault of multi-terminal direct-current power transmission system |
| CN109193731B (en) * | 2018-08-29 | 2020-09-22 | 许继电气股份有限公司 | Power control method for flexible direct current power grid system receiving end fault |
| CN110912174B (en) * | 2019-12-02 | 2021-03-16 | 中国南方电网有限责任公司超高压输电公司柳州局 | Method and device for stopping multi-terminal direct-current power transmission system under communication fault |
| CN111600326B (en) * | 2020-05-25 | 2022-07-22 | 南京南瑞继保电气有限公司 | Power transfer method of parallel three-terminal direct-current power transmission system |
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