CN108418228A - A kind of active power controller method when converter fault and flexible direct current power grid - Google Patents

A kind of active power controller method when converter fault and flexible direct current power grid Download PDF

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Publication number
CN108418228A
CN108418228A CN201810265194.6A CN201810265194A CN108418228A CN 108418228 A CN108418228 A CN 108418228A CN 201810265194 A CN201810265194 A CN 201810265194A CN 108418228 A CN108418228 A CN 108418228A
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China
Prior art keywords
active power
current conversion
conversion station
transverter
tra
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Inventor
宋延涛
陈大鹏
许梦阳
岳笑歌
王胜
周晓风
王世标
苏进国
张群
曹森
戴国安
刘旭辉
李乾
孔令凯
吴东崛
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Xuji Group Co Ltd
XJ Electric Co Ltd
State Grid Shanghai Electric Power Co Ltd
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Xuji Group Co Ltd
XJ Electric Co Ltd
State Grid Shanghai Electric Power Co Ltd
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Priority to CN201810265194.6A priority Critical patent/CN108418228A/en
Publication of CN108418228A publication Critical patent/CN108418228A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

The present invention provides the active power controller methods and flexible direct current power grid when a kind of converter fault, by the corresponding active power reference value of positive or negative pole transverter and active power limits value that obtain each current conversion station, calculate the maximum value of the cathode of each current conversion station of the positive or negative pole transverter reception of each current conversion station or the active power of positive transverter transfer, according to the maximum value of active power, the active power reference value of the positive transverter and cathode transverter of each current conversion station is redistributed.When any converter fault exits, in order to avoid there is overvoltage or under-voltage operating mode in power grid, active power of the loss few as possible in net, after transverter active power controller system recalculates the active power reference value of each transverter, realize redistributing in net active power, it is not only able to the DC voltage of fast and stable flexible direct current power grid, and the active power utilization rate of flexible direct current network system can be improved and the trend of flexible direct current network system is optimized.

Description

A kind of active power controller method when converter fault and flexible direct current power grid
Technical field
The invention belongs to active power when a kind of flexible direct current network system technical field, more particularly to converter fault Control method and flexible direct current power grid.
Background technology
Direct current transportation is considered as the developing direction of future electrical energy transmission, and relative to ac transmission system, straight-flow system is steady Qualitative height, transmission loss is small, the realization of development and high voltage DC breaker in particular with high-voltage large-capacity power device, DC grid has had been provided with the technical foundation for substituting AC network, and direct current transportation at present includes two kinds of technology paths, one is Current source type high voltage dc transmission technology (LCC-HVDC) based on thyristor, another is how electric to be based on modularization Sane level joins the voltage-source type high voltage dc transmission technology (VSC-HVDC) of transverter, also referred to as flexible DC transmission technology, VSC- HVDC technologies have apparent technical advantage relative to LCC-HVDC technologies.
The problem of commutation failure is not present due to it in flexible direct current power grid, and voltage harmonic content is few, output frequency and electricity Pressure is stablized, and can quickly adjust active power and reactive power, control flexibility is good, and it is defeated can to substitute Traditional DC to a certain extent Electricity carries out extensive remote power transmission, can also be achieved the energy between energy storage and load such as regenerative resource, pumped storage and flexibly interacts, real The now access of extensive clean energy resource collects and conveys, and has broad application prospects.Especially its trend inverts and direct current Pressure the characteristics of remaining unchanged, it is made to be easy to be built into multi-terminal direct current transmission system, realizes multiple feed and more drop points by electricity, To provide good technology realization rate for guarantee system global stability and tide optimization configuration.
When flexible direct current power grid is run under power grid standard condition, positive and negative anodes transverter active power balance is transported in current conversion station Row, flexible direct current anode network and the same balance movement of cathode network active power revenue and expenditure, but when converter fault need to exit When, it will the active power payment imbalance operation of network where leading to failure transverter, in order to solve asking for unbalanced power Topic, Publication No. " CN104901301A ", in entitled " a kind of control method for coordinating of Multi-end flexible direct current transmission system " State's patent provides a kind of scheme, and DC adjustment is added in DC voltage station of determining of the program in Multi-end flexible direct current transmission system Sagging slop control；Determine the sagging slop control that DC voltage regulation is added in active power station；The method that the patent provides needs Will be to determining DC voltage station and determining active power station to carry out different control respectively, therefore control method is more complicated, causes soft Property DC grid power-balance control it is inaccurate, and control efficiency is relatively low.
Invention content
The purpose of the present invention is to provide the active power controller method and flexible direct current power grid when a kind of converter fault, Active power balance efficiency is low when for solving the problems, such as line commutation device failure in the prior art.
To achieve the above object, the present invention provides a kind of active power controller methods when converter fault, including with Lower technical solution：
Method scheme one, a kind of active power controller method when converter fault, includes the following steps：
1) at least two sending end current conversion stations and at least two receiving end current conversion stations are established respectively, and sending end current conversion station is wattful power Rate control model；Current conversion station is DC voltage control pattern one of in receiving end current conversion station, and remaining receiving end current conversion station is Active power controller pattern；
2) when in each sending end current conversion station or each receiving end current conversion station positive transverter or cathode converter fault it is out of service When, it obtains the cathode transverter of sending end current conversion station or receiving end current conversion station or the corresponding active power reference value of positive transverter and has Work(power limit calculates the positive transverter of each current conversion station or the cathode change of current of each current conversion station that cathode transverter can receive The maximum value of device or the active power of positive transverter transfer, the maximum value of the active power criticizes pole transverter or cathode changes The corresponding active power limits value of stream device subtracts the difference that its corresponding active power reference value obtains；
3) maximum value for the active power that can be received according to the positive transverter of each current conversion station or cathode transverter, again Distribute the active power reference value of the positive transverter and cathode transverter of each current conversion station.
Method scheme two, on the basis of method scheme one, the converter fault includes active power sending end current conversion station Converter fault, active power receiving end current conversion station converter fault and receiving end current conversion station be in DC voltage control pattern Converter fault.
Method scheme three sets current conversion station A positive and negative anodes transverter active power reference values on the basis of method scheme two Respectively Pref_A+、Pref_A-, current conversion station A positive and negative anodes transverter active power limit values are Plim_A+、Plim_A-, current conversion station B positive and negative anodes Transverter active power reference value is respectively Pref_B+、Pref_B-, current conversion station B positive and negative anodes transverter active power limit values are Plim_B+、 Plim_B-；
If active power sending end current conversion station B anode converter faults are out of service, current conversion station B cathode transverter energy is calculated Enough receive the first maximum value P of the active power of current conversion station B anode transverters transfertra_B-If Pref_B+≥Ptra_B-, then by institute The active power reference value for stating current conversion station B cathode transverters is revised as Plim_B-；If Pref_B+<Ptra_B-, then by the current conversion station B The active power reference value of cathode transverter is revised as Pref_B-+Pref_B+；
The cathode transverter for calculating receiving end current conversion station A corresponding with current conversion station B receives the wattful power of positive transverter transfer Second maximum value P of ratetra_A-If Ptra_A->Ptra_B-, then the cathode transverter active power reference value of current conversion station A is revised as Pref_A-+Ptra_B-, and the positive transverter active power reference value of the current conversion station A is revised as Pref_A+-Ptra_B-；If Ptra_B-≥Ptra_A-, then the cathode transverter active power reference value of the current conversion station A is revised as Plim_A-, and will it is described by The positive transverter active power reference value of end current conversion station A is revised as Pref_A+-Ptra_A-；
If Pref_B+<Ptra_A-, then the cathode transverter active power reference value of receiving end current conversion station A is revised as Pref_A-+ Pref_B+, and the active power reference value of the positive transverter of receiving end current conversion station A is revised as Pref_A+-Pref_B+；If Pref_B+≥ Ptra_A-, then the cathode transverter active power reference value of the current conversion station A is revised as Plim_A-, and by the receiving end current conversion station The positive transverter active power reference value of A is revised as Pref_A+-Ptra_A-；
The active power of sending end current conversion station C remains unchanged, and the change of current of DC voltage control pattern is in receiving end current conversion station It stands the active power self-balancing of D.
Method scheme four sets current conversion station A positive and negative anodes transverter active power reference values on the basis of method scheme two Respectively Pref_A+、Pref_A-, current conversion station A positive and negative anodes transverter active power limit values are Plim_A+、Plim_A-, current conversion station B positive and negative anodes Transverter active power reference value is respectively Pref_B+、Pref_B, current conversion station B positive and negative anodes transverter active power limit values are Plim_B+、 Plim_B-, current conversion station C positive and negative anodes transverter active power reference values are respectively Pref_C+、Pref_C, current conversion station C positive and negative anodes transverters Active power limit value is Plim_C+、Plim_C-；
If active power receiving end current conversion station A anode converter faults are out of service, current conversion station A cathode transverter energy is calculated Second maximum value P of the enough active power for receiving positive transverter transfertra_A-If Pref_A+≥Ptra_A-, then current conversion station A is born The active power reference value of pole transverter is revised as Plim_A-；If Pref_A+<Ptra_A-, then by the wattful power of the cathode transverter Rate reference value is revised as Pref_A-+Pref_A+；
The cathode transverter for calculating sending end current conversion station B corresponding with current conversion station A receives the wattful power of positive transverter transfer First maximum value P of ratetra_B-If Ptra_A-≥Ptra_B-, then current conversion station B cathode transverter active power reference values are revised as Plim_B, current conversion station B anode transverter active power reference values are revised as Pref_B+-Ptra_B-；If Ptra_A-<Ptra_B-, then by the change of current B cathode transverter active power reference values of standing are revised as Pref_B-+Ptra_A-, by current conversion station B anode transverter active power references Value is revised as Pref_B+-Ptra_A-；
The cathode transverter for calculating active power sending end current conversion station C receives the third for the active power that positive transverter shifts Maximum value Ptra_C-If Ptra_A--Ptra_B-≥Ptra_C-, then current conversion station C cathode transverter active power reference values are revised as Plim_C-, current conversion station C anode transverter active power reference values are revised as Pref_C+-Ptra_C-If Ptra_A--Ptra_B-<Ptra_C-, Current conversion station C cathode transverter active power reference values are then revised as Pref_C-+(Ptra_A--Ptra_B-), current conversion station C anodes are changed Stream device active power reference value is revised as Pref_C+-(Ptra_A--Ptra_B-)；
If Pref_A+≥Ptra_B-, then current conversion station B cathode transverter active power reference values are revised as Plim_B-, by the change of current B anode transverter active power reference values of standing are revised as Pref_B+-Ptra_B-；If Pref_A+<Ptra_B-, then current conversion station B cathode are changed Stream device active power reference value is revised as Pref_B-+Ptra_A-, current conversion station B anode transverter active power reference values are revised as Pref_B+-Ptra_A-；
If Pref_A+-Ptra_B-≥Ptra_C-, then current conversion station C cathode transverter active power reference values are revised as Plim_C-, Current conversion station C anode transverter active power reference values are revised as Pref_C+-Ptra_C-If Pref_A+-Ptra_B-<Ptra_C-, then will change Stream station C cathode transverter active power reference values are revised as Pref_C-+(Ptra_A--Ptra_B-), current conversion station C anode transverters are had Work(value and power reference is revised as Pref_C+-(Ptra_A--Ptra_B-)；
The active power self-balancing of current conversion station D in DC voltage control pattern in receiving end current conversion station.
Method scheme five sets current conversion station A positive and negative anodes transverter active power reference values on the basis of method scheme two Respectively Pref_A+、Pref_A-, current conversion station A positive and negative anodes transverter active power limit values are Plim_A+、Plim_A-, current conversion station B positive and negative anodes Transverter active power reference value is respectively Pref_B+、Pref_B-, current conversion station B positive and negative anodes transverter active power limit values are Plim_B+、 Plim_B-, current conversion station C positive and negative anodes transverter active power reference values are respectively Pref_C+、Pref_C-, current conversion station C positive and negative anodes transverters Active power limit value is Plim_C+、Plim_C-, current conversion station D positive and negative anodes transverter active power reference values are respectively Pmea_D+、Pmea_D-, Current conversion station D positive and negative anodes transverter active power limit values are Plim_D+、Plim_D-；
If DC voltage receiving end current conversion station D anode converter faults are out of service, calculate corresponding with current conversion station D active The corresponding cathode transverters of power sending end current conversion station C receive the active power third maximum value P of positive transverter transfertra_C-If Pmea_D+≥Ptra_C-, then current conversion station C cathode transverter active power reference values are revised as Plim_C-, by the current conversion station C anode changes of current Device active power reference value is revised as Pref_C+-Ptra_C-If Pmea_D+<Ptra_C-, then by current conversion station C cathode transverter active power Reference value is revised as Pref_C-+Pmea_D+, current conversion station C anode transverter active power reference values are revised as Pref_C+-Pmea_D+；
The of active power of the transfer of positive transverter can be received by calculating active power sending end current conversion station B cathode transverter One maximum value Ptra_B-If Pmea_D+-Ptra_C-≥Ptra_B-, then the active power reference value of current conversion station B cathode transverters is changed For Plim_B-, the active power reference value of current conversion station B anode transverters is revised as Pref_B+-Ptra_B-；If Pmea_D+-Ptra_C-< Ptra_B-, then the active power reference value of current conversion station B cathode transverters is revised as Pref_B-+(Pmea_D+-Ptra_C-), by current conversion station The active power reference value of B anode transverters is revised as Pref_B+-(Pmea_D+-Ptra_C-)；If Ptra_C-≥Ptra_A-, then by the change of current A cathode transverter active power reference values of standing are revised as Plim_A-, current conversion station A anode transverter active power self-balancings, if Ptra_C-<Ptra_A-, then current conversion station A cathode transverter active power reference values are revised as Plim_A-+Ptra_C-, current conversion station A anodes Transverter active power self-balancing；If Pmea_D+≥Ptra_A-, then current conversion station A cathode transverter active power reference values are revised as Plim_A-, otherwise current conversion station A anode transverter active power self-balancings repair current conversion station A cathode transverter active power reference values It is changed to Pref_A-+Pmea_D, current conversion station A anode transverter active power self-balancings；Current conversion station D cathode transverters active power is certainly flat Weighing apparatus.
The present invention also provides a kind of flexible direct current power grids, including following technical scheme：
Power grid scheme one, a kind of flexible direct current power grid, including current conversion station active power coordinated control system, at least two give End stream station and at least two receiving end current conversion stations, sending end current conversion station are active power controller pattern；In receiving end current conversion station wherein One current conversion station is DC voltage control pattern, and remaining receiving end current conversion station is active power controller pattern, and each current conversion station changes Stream device has been correspondingly connected with converter Control system, passes through between the current conversion station active power coordinated control system and each current conversion station Fiber optic communication connects；When in each sending end current conversion station or each receiving end current conversion station positive transverter or cathode converter fault exit fortune When row, the current conversion station active power controller system obtains the positive transverter of each current conversion station by converter Control system and bears The active power reference value and active power limits value of pole transverter, and calculate positive transverter or the cathode change of current of each current conversion station The maximum value of the cathode transverter for each current conversion station that device can receive or the active power of positive transverter transfer, the wattful power The maximum value of rate criticizes pole transverter or the corresponding active power limits value of cathode transverter subtracts its corresponding active power ginseng Examine the difference being worth to；According to the maximum for the active power that the positive transverter of each current conversion station or cathode transverter can receive Value, redistributes the active power reference value of the positive transverter and cathode transverter of each current conversion station.
Power grid scheme two, on the basis of power grid scheme one, the converter fault includes active power sending end current conversion station Converter fault, active power receiving end current conversion station converter fault and receiving end current conversion station be in DC voltage control pattern Converter fault.
Power grid scheme three sets current conversion station A positive and negative anodes transverter active power reference values on the basis of power grid scheme two Respectively Pref_A+、Pref_A-, current conversion station A positive and negative anodes transverter active power limit values are Plim_A+、Plim_A-, current conversion station B positive and negative anodes Transverter active power reference value is respectively Pref_B+、Pref_B-, current conversion station B positive and negative anodes transverter active power limit values are Plim_B+、 Plim_B-；
If active power sending end current conversion station B anode converter faults are out of service, current conversion station B cathode transverter energy is calculated Enough receive the first maximum value P of the active power of current conversion station B anode transverters transfertra_B-If Pref_B+≥Ptra_B-, then by institute The active power reference value for stating current conversion station B cathode transverters is revised as Plim_B-；If Pref_B+<Ptra_B-, then by the current conversion station B The active power reference value of cathode transverter is revised as Pref_B-+Pref_B+；
The cathode transverter for calculating receiving end current conversion station A corresponding with current conversion station B receives the wattful power of positive transverter transfer Second maximum value P of ratetra_A-If Ptra_A->Ptra_B-, then the cathode transverter active power reference value of current conversion station A is revised as Pref_A-+Ptra_B-, and the positive transverter active power reference value of the current conversion station A is revised as Pref_A+-Ptra_B-；If Ptra_B-≥Ptra_A-, then the cathode transverter active power reference value of the current conversion station A is revised as Plim_A-, and will it is described by The positive transverter active power reference value of end current conversion station A is revised as Pref_A+-Ptra_A-；
If Pref_B+<Ptra_A-, then the cathode transverter active power reference value of receiving end current conversion station A is revised as Pref_A-+ Pref_B+, and the active power reference value of the positive transverter of receiving end current conversion station A is revised as Pref_A+-Pref_B+；If Pref_B+≥ Ptra_A-, then the cathode transverter active power reference value of the current conversion station A is revised as Plim_A-, and by the receiving end current conversion station The positive transverter active power reference value of A is revised as Pref_A+-Ptra_A-；
The active power of sending end current conversion station C remains unchanged, and the change of current of DC voltage control pattern is in receiving end current conversion station It stands the active power self-balancing of D.
Power grid scheme four sets current conversion station A positive and negative anodes transverter active power reference values on the basis of power grid scheme two Respectively Pref_A+、Pref_A-, current conversion station A positive and negative anodes transverter active power limit values are Plim_A+、Plim_A-, current conversion station B positive and negative anodes Transverter active power reference value is respectively Pref_B+、Pref_B-, current conversion station B positive and negative anodes transverter active power limit values are Plim_B+、 Plim_B-, current conversion station C positive and negative anodes transverter active power reference values are respectively Pref_C+、Pref_C-, current conversion station C positive and negative anodes transverters Active power limit value is Plim_C+、Plim_C-；
If active power receiving end current conversion station A anode converter faults are out of service, current conversion station A cathode transverter energy is calculated Second maximum value P of the enough active power for receiving positive transverter transfertra_A-If Pref_A+≥Ptra_A-, then current conversion station A is born The active power reference value of pole transverter is revised as Plim_A-；If Pref_A+<Ptra_A-, then by the wattful power of the cathode transverter Rate reference value is revised as Pref_A-+Pref_A+；
The cathode transverter for calculating sending end current conversion station B corresponding with current conversion station A receives the wattful power of positive transverter transfer First maximum value P of ratetra_B-If Ptra_A-≥Ptra_B-, then current conversion station B cathode transverter active power reference values are revised as Plim_B-, current conversion station B anode transverter active power reference values are revised as Pref_B+-Ptra_B-；If Ptra_A-<Ptra_B-, then by the change of current B cathode transverter active power reference values of standing are revised as Pref_B-+Ptra_A-, by current conversion station B anode transverter active power references Value is revised as Pref_B+-Ptra_A-；
The cathode transverter for calculating active power sending end current conversion station C receives the third for the active power that positive transverter shifts Maximum value Ptra_C-If Ptra_A--Ptra_B-≥Ptra_C-, then current conversion station C cathode transverter active power reference values are revised as Plim_C-, current conversion station C anode transverter active power reference values are revised as Pref_C+-Ptra_C-If Ptra_A--Ptra_B-<Ptra_C-, Current conversion station C cathode transverter active power reference values are then revised as Pref_C-+(Ptra_A--Ptra_B-), current conversion station C anodes are changed Stream device active power reference value is revised as Pref_C+-(Ptra_A--Ptra_B-)；
If Pref_A+≥Ptra_B-, then current conversion station B cathode transverter active power reference values are revised as Plim_B-, by the change of current B anode transverter active power reference values of standing are revised as Pref_B+-Ptra_B-；If Pref_A+<Ptra_B-, then current conversion station B cathode are changed Stream device active power reference value is revised as Pref_B-+Ptra_A-, current conversion station B anode transverter active power reference values are revised as Pref_B+-Ptra_A-；
If Pref_A+-Ptra_B-≥Ptra_C-, then current conversion station C cathode transverter active power reference values are revised as Plim_C-, Current conversion station C anode transverter active power reference values are revised as Pref_C+-Ptra_C-If Pref_A+-Ptra_B-<Ptra_C-, then will change Stream station C cathode transverter active power reference values are revised as Pref_C-+(Ptra_A--Ptra_B-), current conversion station C anode transverters are had Work(value and power reference is revised as Pref_C+-(Ptra_A--Ptra_B-)；
The active power self-balancing of current conversion station D in DC voltage control pattern in receiving end current conversion station.
Power grid scheme five sets current conversion station A positive and negative anodes transverter active power reference values on the basis of power grid scheme two Respectively Pref_A+、Pref_A-, current conversion station A positive and negative anodes transverter active power limit values are Plim_A+、Plim_A-, current conversion station B positive and negative anodes Transverter active power reference value is respectively Pref_B+、Pref_B-, current conversion station B positive and negative anodes transverter active power limit values are Plim_B+、 Plim_B-, current conversion station C positive and negative anodes transverter active power reference values are respectively Pref_C+、Pref_C-, current conversion station C positive and negative anodes transverters Active power limit value is Plim_C+、Plim_C-, current conversion station D positive and negative anodes transverter active power reference values are respectively Pmea_D+、Pmea_D-, Current conversion station D positive and negative anodes transverter active power limit values are Plim_D+、Plim_D-；
If DC voltage receiving end current conversion station D anode converter faults are out of service, calculate corresponding with current conversion station D active The corresponding cathode transverters of power sending end current conversion station C receive the active power third maximum value P of positive transverter transfertra_C-If Pmea_D+≥Ptra_C-, then current conversion station C cathode transverter active power reference values are revised as Plim_C-, by the current conversion station C anode changes of current Device active power reference value is revised as Pref_C+-Ptra_C-If Pmea_D+<Ptra_C-, then by current conversion station C cathode transverter active power Reference value is revised as Pref_C-+Pmea_D+, current conversion station C anode transverter active power reference values are revised as Pref_C+-Pmea_D+；
The of active power of the transfer of positive transverter can be received by calculating active power sending end current conversion station B cathode transverter One maximum value Ptra_B-If Pmea_D+-Ptra_C-≥Ptra_B-, then the active power reference value of current conversion station B cathode transverters is changed For Plim_B-, the active power reference value of current conversion station B anode transverters is revised as Pref_B+-Ptra_B-；If Pmea_D+-Ptra_C-< Ptra_B-, then the active power reference value of current conversion station B cathode transverters is revised as Pref_B-+(Pmea_D+-Ptra_C-), by current conversion station The active power reference value of B anode transverters is revised as Pref_B+-(Pmea_D+-Ptra_C-)；If Ptra_C-≥Ptra_A-, then by the change of current A cathode transverter active power reference values of standing are revised as Plim_A-, current conversion station A anode transverter active power self-balancings, if Ptra_C-<Ptra_A-, then current conversion station A cathode transverter active power reference values are revised as Plim_A-+Ptra_C-, current conversion station A anodes Transverter active power self-balancing；If Pmea_D+≥Ptra_A-, then current conversion station A cathode transverter active power reference values are revised as Plim_A-, otherwise current conversion station A anode transverter active power self-balancings repair current conversion station A cathode transverter active power reference values It is changed to Pref_A-+Pmea_D, current conversion station A anode transverter active power self-balancings；Current conversion station D cathode transverters active power is certainly flat Weighing apparatus.
The beneficial effects of the invention are as follows：
The present invention by obtain each current conversion station positive transverter or the corresponding active power reference value of cathode transverter and Active power limits value, calculates the positive transverter of each current conversion station or the cathode of each current conversion station that cathode transverter can receive changes The maximum value for flowing the active power of device or positive transverter transfer, according to the positive transverter of each current conversion station or cathode transverter energy The maximum value of the active power enough received redistributes the positive transverter of each current conversion station and the active power ginseng of cathode transverter Examine value.The present invention is when any converter fault exits, in order to avoid overvoltage or under-voltage operating mode, loss few as possible occurs in power grid In the active power of net, transverter active power coordinated control system counts the active power reference value of each transverter again After calculation, realizes redistributing in net active power, be not only able to the DC voltage of fast and stable flexible direct current power grid, Er Qieneng It enough improves the active power utilization rate of flexible direct current network system and the trend of flexible direct current network system is optimized.
Description of the drawings
Fig. 1 is the topology diagram of flexible direct current network system；
Fig. 2 is that current conversion station active power coordinated control system and converter Control system data interact schematic diagram；
Fig. 3 is current conversion station B anode converter faults when exiting, the stream that remaining transverter active power reference value is redistributed Cheng Tu；
Fig. 4 is current conversion station A anode converter faults when exiting, the stream that remaining transverter active power reference value is redistributed Cheng Tu；
Fig. 5 is current conversion station D anode converter faults when exiting, the stream that remaining transverter active power reference value is redistributed Cheng Tu.
Specific implementation mode
The specific implementation mode of the present invention is further described below in conjunction with the accompanying drawings：
A kind of flexible direct current power grid, including current conversion station active power coordinated control system, at least two sending end stream stations and extremely Few two receiving end current conversion stations, sending end current conversion station is active power controller pattern；Current conversion station one of in receiving end current conversion station For DC voltage control pattern, remaining receiving end current conversion station is active power controller pattern, and the transverter of each current conversion station, which corresponds to, to be connected It is connected to converter Control system, is connected by fiber optic communication between current conversion station active power coordinated control system and each current conversion station.
When the positive transverter or cathode converter fault out of service in each sending end current conversion station or each receiving end current conversion station, Current conversion station active power controller system obtains the positive transverter and cathode transverter of each current conversion station by converter Control system Active power reference value and active power limits value, and calculate the positive transverter of each current conversion station or cathode transverter and can connect The maximum value of the cathode transverter for each current conversion station received or the active power of positive transverter transfer, the maximum value of active power refer to Positive transverter or the corresponding active power limits value of cathode transverter subtract the difference that its corresponding active power reference value obtains Value；According to the maximum value for the active power that the positive transverter of each current conversion station or cathode transverter can receive, redistribute each The active power reference value of the positive transverter and cathode transverter of current conversion station.
Specifically, the topology diagram of flexible direct current power grid as shown in Figure 1, flexible direct current power grid include current conversion station A, Current conversion station B, current conversion station C and current conversion station D, current conversion station B and current conversion station C are active power sending end current conversion station, current conversion station A and current conversion station D is active power receiving end；Wherein, the positive transverter of current conversion station D and cathode transverter are DC voltage control pattern, the change of current It stands the positive transverter of A, current conversion station B and current conversion station C and cathode transverter is active power controller pattern.
In the present embodiment, the positive and negative anodes change of current that current conversion station active power controller system passes through point-to-point optical fiber and each current conversion station Device control system connects, and uses IEC61850 international standard protocols, other can also be used as other embodiment Communication protocol.
Specifically, when some change of current station failure needs to exit, the control method of the active power of each current conversion station, including Following steps：
1, current conversion station active power coordinated control system receives the positive transverter or cathode transverter of a certain current conversion station When failure exits, the current conversion station anode transverter being currently received is locked or analog quantity that cathode converter Control system sends over (locking time T0), while triggering current conversion station active power coordinated control system actuating signal (duration T0), and according to current The state quantity signal that each current conversion station positive and negative anodes converter Control system received is brought carries out logic judgment.
Current conversion station active power coordinated control system and each current conversion station positive and negative anodes converter Control system carry out data interaction, As shown in Figure 2.The analog signals that converter Control system gives current conversion station active power controller system are transverter wattful power Rate reference value and active power limits value, state quantity signal are converter deblocking state, failure locking state and active power/straight Flow voltage mode control；The analog signals that converter Control system receives current conversion station active power controller system are to be changed after calculating Device active power reference value is flowed, state quantity signal is to change current conversion station active power controller system acting signal.
The active power reference value and limits value of current conversion station A positive and negative anodes transverters are respectively Pref_A+, Pref_A-, Plim_A+, Plim_A-；The active power reference value and limits value of current conversion station B positive and negative anodes transverters are respectively Pref_B+, Pref_B-, Plim_B+, Plim_B-；The active power reference value and limits value of current conversion station C positive and negative anodes transverters are respectively Pref_C+, Pref_C-, Plim_C+, Plim_C-；Since current conversion station D positive and negative anodes converter Control systems are that (give tacit consent to direct voltage reference value is DC voltage control pattern Flexible direct current power grid DC voltage stability 1.0pu) is controlled, has active power Self-balancing, active power reference value is real When measured value, the active power reference value and limits value of current conversion station D positive and negative anodes are respectively Pmea_D+, Pmea_D-, Plim_D+, Plim_D-。
2, each current conversion station positive and negative anodes transverter control that current conversion station active power coordinated control system will be calculated in step 1 The active power reference value and current conversion station active power coordinated control system actuating signal that system processed is distributed, while being handed down to each Current conversion station positive and negative anodes converter Control system.
3, each current conversion station positive and negative anodes converter Control system receives current conversion station active power coordinated control system and brings Active power reference value, and change converter Control system according to current conversion station active power coordinated control system actuating signal Active power reference value.
4, each current conversion station positive and negative anodes converter Control system stable operation under new power-balance, waits for that failure exits the change of current Device control system troubleshooting finish and then it is secondary put into operation, each current conversion station positive and negative anodes active power is re-issued by scheduling Reference value.
Wherein, converter fault is divided into the converter fault of active power sending end current conversion station, active power receiving end in step 1 Three kinds of the converter fault of the converter fault of current conversion station and the current conversion station of DC voltage control.
The first calculates each transverter wattful power so that active power sending end current conversion station B anode converter faults exit as an example Rate reference value, the first maximum value of active power of positive transverter transfer can be received by calculating current conversion station B cathode transverter Ptra_B-, i.e., the active power ability that current conversion station B cathode can receive anode transfer is Ptra_B-=Plim_B--Pref_B-, current conversion station C Positive and negative anodes active power reference value remains unchanged, and the active power ability that current conversion station A cathode can receive anode transfer is Ptra_A- =Plim_A--Pref_A-, current conversion station D positive and negative anodes active power self-balancings.Calculation flow chart is as shown in Figure 3：
Calculate current conversion station B cathode transverter can receive the transfer of current conversion station B anode transverters active power first most Big value Ptra_B-If Pref_B+≥Ptra_B-, then current conversion station B cathode transverter receive positive transverter active power offset Ptra_B-, the active power reference value of current conversion station B cathode transverters is revised as Plim_B-；If Pref_B+<Ptra_B-, then current conversion station B Cathode transverter receives positive transverter active power offset Pref_B+, by the active power reference of current conversion station B cathode transverters Value is revised as Pref_B-+Pref_B+；
The cathode transverter for calculating receiving end current conversion station A corresponding with current conversion station B receives the wattful power of positive transverter transfer Second maximum value P of ratetra_A-If Ptra_A->Ptra_B-, then the cathode transverter active power reference value of current conversion station A is revised as Pref_A-+Ptra_B-, and the positive transverter active power reference value of current conversion station A is revised as Pref_A+-Ptra_B-；If Ptra_B-≥ Ptra_A-, then the cathode transverter active power reference value of current conversion station A is revised as Plim_A-, and by the anode of receiving end current conversion station A Transverter active power reference value is revised as Pref_A+-Ptra_A-；
If Pref_B+<Ptra_A-, then the cathode transverter active power reference value of receiving end current conversion station A is revised as Pref_A-+ Pref_B+, and the active power reference value of the positive transverter of receiving end current conversion station A is revised as Pref_A+-Pref_B+；If Pref_B+≥ Ptra_A-, then the cathode transverter active power reference value of current conversion station A is revised as Plim_A-, and by the anode of receiving end current conversion station A Transverter active power reference value is revised as Pref_A+-Ptra_A-；
The active power of sending end current conversion station C remains unchanged, and the change of current of DC voltage control pattern is in receiving end current conversion station It stands the active power self-balancing of D.
By taking active power receiving end end current conversion station A anode converter faults exit as an example, it is active to calculate each transverter second Value and power reference, the active power ability that current conversion station A cathode can receive anode transfer are Ptra_A-=Plim_A--Pref_A-, the change of current The active power ability that B cathode of standing can receive anode transfer is Ptra_B-=Plim_B--Pref_B-, current conversion station C cathode can receive The active power ability of anode transfer is Ptra_C-=Plim_C--Pref_C-, current conversion station D positive and negative anodes transverter active power self-balancings. Calculation flow chart is as shown in Figure 4：
The second maximum value of active power of positive transverter transfer can be received by calculating current conversion station A cathode transverter Ptra_A-If Pref_A+≥Ptra_A-, then current conversion station A cathode transverter receive positive transverter active power offset Ptra_A-, will The active power reference value of current conversion station A cathode transverters is revised as Plim_A-；If Pref_A+<Ptra_A-, then the current conversion station A cathode change of current Device receives positive transverter active power offset Pref_A+, the active power reference value of cathode transverter is revised as Pref_A-+ Pref_A+；
The cathode transverter for calculating sending end current conversion station B corresponding with current conversion station A receives the wattful power of positive transverter transfer First maximum value P of ratetra_B-If Ptra_A-≥Ptra_B-, then current conversion station B cathode transverter active power reference values are revised as Plim_B-, current conversion station B anode transverter active power reference values are revised as Pref_B+-Ptra_B-；If Ptra_A-<Ptra_B-, then by the change of current B cathode transverter active power reference values of standing are revised as Pref_B-+Ptra_A-, by current conversion station B anode transverter active power references Value is revised as Pref_B+-Ptra_A-；
The cathode transverter for calculating active power sending end current conversion station C receives the third for the active power that positive transverter shifts Maximum value Ptra_C-If Ptra_A--Ptra_B-≥Ptra_C-, then current conversion station C cathode transverter active power reference values are revised as Plim_C-, current conversion station C anode transverter active power reference values are revised as Pref_C+-Ptra_C-If Ptra_A--Ptra_B-<Ptra_C-, Current conversion station C cathode transverter active power reference values are then revised as Pref_C-+(Ptra_A--Ptra_B-), current conversion station C anodes are changed Stream device active power reference value is revised as Pref_C+-(Ptra_A--Ptra_B-)；
If Pref_A+≥Ptra_B-, then current conversion station B cathode transverter active power reference values are revised as Plim_B-, by the change of current B anode transverter active power reference values of standing are revised as Pref_B+-Ptra_B-；If Pref_A+<Ptra_B-, then current conversion station B cathode are changed Stream device active power reference value is revised as Pref_B-+Ptra_A-, current conversion station B anode transverter active power reference values are revised as Pref_B+-Ptra_A-；
If Pref_A+-Ptra_B-≥Ptra_C-, then current conversion station C cathode transverter active power reference values are revised as Plim_C-, Current conversion station C anode transverter active power reference values are revised as Pref_C+-Ptra_C-If Pref_A+-Ptra_B-<Ptra_C-, then will change Stream station C cathode transverter active power reference values are revised as Pref_C-+(Ptra_A--Ptra_B-), current conversion station C anode transverters are had Work(value and power reference is revised as Pref_C+-(Ptra_A--Ptra_B-)；
The active power self-balancing of current conversion station D in DC voltage control pattern in receiving end current conversion station.
The third calculates each transverter wattful power so that DC voltage receiving end current conversion station D anode converter faults exit as an example Rate reference value, current conversion station A anodes are straight to stablize positive electrode systems for DC voltage control pattern by active power controller pattern switching Galvanic electricity pressure, the active power ability that current conversion station A cathode can receive anode transfer are Ptra_A-=Plim_A--Pref_A-, current conversion station B The active power ability that cathode can receive anode transfer is Ptra_B-=Plim_B--Pref_B-, current conversion station C cathode can receive just The active power ability of pole transfer is Ptra_C-=Plim_C--Pref_C-, current conversion station D cathode transverter active power self-balancings.It calculates Flow chart is as shown in Figure 5：
The corresponding cathode transverters of calculating active power sending end current conversion station C corresponding with current conversion station D receive positive transverter The active power third maximum value P of transfertra_C-If Pmea_D+≥Ptra_C-, then the positive change of current of current conversion station C cathode transverter reception Device active power offset Ptra_C-, current conversion station C cathode transverter active power reference values are revised as Plim_C-, by current conversion station C Positive transverter active power reference value is revised as Pref_C+-Ptra_C-If Pmea_D+<Ptra_C-, then current conversion station C cathode transverter connect Receive positive transverter active power offset Pmea_D+, current conversion station C cathode transverter active power reference values are revised as Pref_C-+ Pmea_D+, current conversion station C anode transverter active power reference values are revised as Pref_C+-Pmea_D+；
The of active power of the transfer of positive transverter can be received by calculating active power sending end current conversion station B cathode transverter One maximum value Ptra_B-If Pmea_D+-Ptra_C-≥Ptra_B-, then the active power reference value of current conversion station B cathode transverters is changed For Plim_B-, the active power reference value of current conversion station B anode transverters is revised as Pref_B+-Ptra_B-；If Pmea_D+-Ptra_C-< Ptra_B-, then the active power reference value of current conversion station B cathode transverters is revised as Pref_B-+(Pmea_D+-Ptra_C-), by current conversion station The active power reference value of B anode transverters is revised as Pref_B+-(Pmea_D+-Ptra_C-)；If Ptra_C-≥Ptra_A-, then by the change of current A cathode transverter active power reference values of standing are revised as Plim_A-, current conversion station A anode transverter active power self-balancings, if Ptra_C-<Ptra_A-, then current conversion station A cathode transverter active power reference values are revised as Plim_A-+Ptra_C-, current conversion station A anodes Transverter active power self-balancing；If Pmea_D+≥Ptra_A-, then current conversion station A cathode transverter active power reference values are revised as Plim_A-, otherwise current conversion station A anode transverter active power self-balancings repair current conversion station A cathode transverter active power reference values It is changed to Pref_A-+Pmea_D, current conversion station A anode transverter active power self-balancings；Current conversion station D cathode transverters active power is certainly flat Weighing apparatus.
Above-described embodiment illustrates by taking positive converter fault as an example, when the cathode of receiving end current conversion station or sending end current conversion station changes Flow device failure it is out of service when, control method with anode converter fault when active power controller method principle as, Since detailed description having been made in above-described embodiment, having when repeating no more cathode converter fault herein Work(Poewr control method.
Specific embodiment is presented above, but the present invention is not limited to embodiment described above.The present invention Basic ideas be above-mentioned basic scheme, for those of ordinary skill in the art, introduction according to the present invention is designed each The model of kind deformation, formula, parameter do not need to spend creative work.The case where not departing from the principle and spirit of the invention Under to embodiment carry out variation, modification, replacement and deformation still fall in protection scope of the present invention.

Claims (10)

1. a kind of active power controller method when converter fault, which is characterized in that include the following steps：
1) at least two sending end current conversion stations and at least two receiving end current conversion stations are established respectively, and sending end current conversion station is active power control Molding formula；Current conversion station is DC voltage control pattern one of in receiving end current conversion station, and remaining receiving end current conversion station is active Power control mode；
2) it when the positive transverter or cathode converter fault out of service in each sending end current conversion station or each receiving end current conversion station, obtains Fetch and deliver the cathode transverter for holding current conversion station or receiving end current conversion station or the corresponding active power reference value of positive transverter and wattful power Rate limits value, calculate the positive transverter of each current conversion station or the cathode transverter of each current conversion station that cathode transverter can receive or The maximum value of the active power of positive transverter transfer, the maximum value of the active power criticize pole transverter or cathode transverter Corresponding active power limits value subtracts the difference that its corresponding active power reference value obtains；
3) maximum value for the active power that can be received according to the positive transverter of each current conversion station or cathode transverter, is redistributed The active power reference value of the positive transverter and cathode transverter of each current conversion station.
2. active power controller method when converter fault according to claim 1, which is characterized in that the transverter Failure includes that the converter fault of active power sending end current conversion station, the converter fault of active power receiving end current conversion station and receiving end are changed Flow the converter fault in DC voltage control pattern at station.
3. active power controller method when converter fault according to claim 2, which is characterized in that setting current conversion station A positive and negative anodes transverter active power reference values are respectively Pref_A+、Pref_A-, current conversion station A positive and negative anodes transverter active power limit values For Plim_A+、Plim_A-, current conversion station B positive and negative anodes transverter active power reference values are respectively Pref_B+、Pref_B-, current conversion station B is positive and negative Pole transverter active power limit value is Plim_B+、Plim_B-；
If active power sending end current conversion station B anode converter faults are out of service, calculating current conversion station B cathode transverter can connect Receive the first maximum value P of the active power of current conversion station B anode transverters transfertra_B-If Pref_B+≥Ptra_B-, then changed described The active power reference value of stream station B cathode transverters is revised as Plim_B-；If Pref_B+<Ptra_B-, then by the current conversion station B cathode The active power reference value of transverter is revised as Pref_B-+Pref_B+；
Calculate the active power of the positive transverter transfer of cathode transverter reception of receiving end current conversion station A corresponding with current conversion station B Second maximum value Ptra_A-If Ptra_A->Ptra_B-, then the cathode transverter active power reference value of current conversion station A is revised as Pref_A-+Ptra_B-, and the positive transverter active power reference value of the current conversion station A is revised as Pref_A+-Ptra_B-；If Ptra_B-≥Ptra_A-, then the cathode transverter active power reference value of the current conversion station A is revised as Plim_A-, and will it is described by The positive transverter active power reference value of end current conversion station A is revised as Pref_A+-Ptra_A-；
If Pref_B+<Ptra_A-, then the cathode transverter active power reference value of receiving end current conversion station A is revised as Pref_A-+Pref_B+, And the active power reference value of the positive transverter of receiving end current conversion station A is revised as Pref_A+-Pref_B+；If Pref_B+≥Ptra_A-, The cathode transverter active power reference value of the current conversion station A is then revised as Plim_A-, and just by the receiving end current conversion station A Pole transverter active power reference value is revised as Pref_A+-Ptra_A-；
The active power of sending end current conversion station C remains unchanged, the current conversion station D in DC voltage control pattern in receiving end current conversion station Active power self-balancing.
4. active power controller method when converter fault according to claim 2, which is characterized in that setting current conversion station A positive and negative anodes transverter active power reference values are respectively Pref_A+、Pref_A-, current conversion station A positive and negative anodes transverter active power limit values For Plim_A+、Plim_A-, current conversion station B positive and negative anodes transverter active power reference values are respectively Pref_B+、Pref_B-, current conversion station B is positive and negative Pole transverter active power limit value is Plim_B+、Plim_B-, current conversion station C positive and negative anodes transverter active power reference values are respectively Pref_C+、Pref_C-, current conversion station C positive and negative anodes transverter active power limit values are Plim_C+、Plim_C-；
If active power receiving end current conversion station A anode converter faults are out of service, calculating current conversion station A cathode transverter can connect Receive the second maximum value P of the active power of positive transverter transfertra_A-If Pref_A+≥Ptra_A-, then current conversion station A cathode are changed The active power reference value of stream device is revised as Plim_A-；If Pref_A+<Ptra_A-, then the active power of the cathode transverter is joined It examines value and is revised as Pref_A-+Pref_A+；
Calculate the active power of the positive transverter transfer of cathode transverter reception of sending end current conversion station B corresponding with current conversion station A First maximum value Ptra_B-If Ptra_A-≥Ptra_B-, then current conversion station B cathode transverter active power reference values are revised as Plim_B-, current conversion station B anode transverter active power reference values are revised as Pref_B+-Ptra_B-；If Ptra_A-<Ptra_B-, then by the change of current B cathode transverter active power reference values of standing are revised as Pref_B-+Ptra_A-, by current conversion station B anode transverter active power references Value is revised as Pref_B+-Ptra_A-；
The third for the active power that the cathode transverter for calculating active power sending end current conversion station C receives positive transverter transfer is maximum Value Ptra_C-If Ptra_A--Ptra_B-≥Ptra_C-, then current conversion station C cathode transverter active power reference values are revised as Plim_C-, Current conversion station C anode transverter active power reference values are revised as Pref_C+-Ptra_C-If Ptra_A--Ptra_B-<Ptra_C-, then will change Stream station C cathode transverter active power reference values are revised as Pref_C-+(Ptra_A--Ptra_B-), current conversion station C anode transverters are had Work(value and power reference is revised as Pref_C+-(Ptra_A--Ptra_B-)；
If Pref_A+≥Ptra_B-, then current conversion station B cathode transverter active power reference values are revised as Plim_B-, just by current conversion station B Pole transverter active power reference value is revised as Pref_B+-Ptra_B-；If Pref_A+<Ptra_B-, then current conversion station B cathode transverters are had Work(value and power reference is revised as Pref_B-+Ptra_A-, current conversion station B anode transverter active power reference values are revised as Pref_B+- Ptra_A-；
If Pref_A+-Ptra_B-≥Ptra_C-, then current conversion station C cathode transverter active power reference values are revised as Plim_C-, will change Stream station C anode transverter active power reference values are revised as Pref_C+-Ptra_C-If Pref_A+-Ptra_B-<Ptra_C-, then by current conversion station C cathode transverter active power reference values are revised as Pref_C-+(Ptra_A--Ptra_B-), by current conversion station C anode transverter wattful powers Rate reference value is revised as Pref_C+-(Ptra_A--Ptra_B-)；
The active power self-balancing of current conversion station D in DC voltage control pattern in receiving end current conversion station.
5. active power controller method when converter fault according to claim 2, which is characterized in that setting current conversion station A positive and negative anodes transverter active power reference values are respectively Pref_A+、Pref_A-, current conversion station A positive and negative anodes transverter active power limit values For Plim_A+、Plim_A-, current conversion station B positive and negative anodes transverter active power reference values are respectively Pref_B+、Pref_B-, current conversion station B is positive and negative Pole transverter active power limit value is Plim_B+、Plim_B-, current conversion station C positive and negative anodes transverter active power reference values are respectively Pref_C+、Pref_C-, current conversion station C positive and negative anodes transverter active power limit values are Plim_C+、Plim_C-, current conversion station D positive and negative anodes transverters Active power reference value is respectively Pmea_D+、Pmea_D-, current conversion station D positive and negative anodes transverter active power limit values are Plim_D+、Plim_D-；
If DC voltage receiving end current conversion station D anode converter faults are out of service, active power corresponding with current conversion station D is calculated The corresponding cathode transverters of sending end current conversion station C receive the active power third maximum value P of positive transverter transfertra_C-If Pmea_D+≥Ptra_C-, then current conversion station C cathode transverter active power reference values are revised as Plim_C-, by the current conversion station C anode changes of current Device active power reference value is revised as Pref_C+-Ptra_C-If Pmea_D+<Ptra_C-, then by current conversion station C cathode transverter active power Reference value is revised as Pref_C-+Pmea_D+, current conversion station C anode transverter active power reference values are revised as Pref_C+-Pmea_D+；
Calculate active power sending end current conversion station B cathode transverter can receive the transfer of positive transverter active power first most Big value Ptra_B-If Pmea_D+-Ptra_C-≥Ptra_B-, then the active power reference value of current conversion station B cathode transverters is revised as Plim_B-, the active power reference value of current conversion station B anode transverters is revised as Pref_B+-Ptra_B-；If Pmea_D+-Ptra_C-< Ptra_B-, then the active power reference value of current conversion station B cathode transverters is revised as Pref_B-+(Pmea_D+-Ptra_C-), by current conversion station The active power reference value of B anode transverters is revised as Pref_B+-(Pmea_D+-Ptra_C-)；If Ptra_C-≥Ptra_A-, then by the change of current A cathode transverter active power reference values of standing are revised as Plim_A-, current conversion station A anode transverter active power self-balancings, if Ptra_C-<Ptra_A-, then current conversion station A cathode transverter active power reference values are revised as Plim_A-+Ptra_C-, current conversion station A anodes Transverter active power self-balancing；If Pmea_D+≥Ptra_A-, then current conversion station A cathode transverter active power reference values are revised as Plim_A-, otherwise current conversion station A anode transverter active power self-balancings repair current conversion station A cathode transverter active power reference values It is changed to Pref_A-+Pmea_D, current conversion station A anode transverter active power self-balancings；Current conversion station D cathode transverters active power is certainly flat Weighing apparatus.
6. a kind of flexible direct current power grid, which is characterized in that including current conversion station active power coordinated control system, at least two sending ends Stream station and at least two receiving end current conversion stations, sending end current conversion station are active power controller pattern；Wherein one in receiving end current conversion station A current conversion station is DC voltage control pattern, and remaining receiving end current conversion station is active power controller pattern, the change of current of each current conversion station Device has been correspondingly connected with converter Control system, passes through light between the current conversion station active power coordinated control system and each current conversion station Fiber communication connects；When in each sending end current conversion station or each receiving end current conversion station positive transverter or cathode converter fault it is out of service When, the current conversion station active power controller system obtains the positive transverter and cathode of each current conversion station by converter Control system The active power reference value and active power limits value of transverter, and calculate the positive transverter or cathode transverter of each current conversion station The maximum value of the cathode transverter for each current conversion station that can be received or the active power of positive transverter transfer, the active power Maximum value criticize pole transverter or the corresponding active power limits value of cathode transverter subtracts its corresponding active power reference The difference being worth to；According to the maximum value for the active power that the positive transverter of each current conversion station or cathode transverter can receive, Redistribute the active power reference value of the positive transverter and cathode transverter of each current conversion station.
7. flexible direct current power grid according to claim 6, which is characterized in that the converter fault includes that active power is sent That holds the converter fault of current conversion station, the converter fault of active power receiving end current conversion station and receiving end current conversion station is in DC voltage The converter fault of control model.
8. flexible direct current power grid according to claim 7, which is characterized in that setting current conversion station A positive and negative anodes transverters are active Value and power reference is respectively Pref_A+、Pref_A-, current conversion station A positive and negative anodes transverter active power limit values are Plim_A+、Plim_A-, the change of current B positive and negative anodes transverter active power reference values of standing are respectively Pref_B+、Pref_B-, current conversion station B positive and negative anodes transverter active power limit Value is Plim_B+、Plim_B-；
If active power sending end current conversion station B anode converter faults are out of service, calculating current conversion station B cathode transverter can connect Receive the first maximum value P of the active power of current conversion station B anode transverters transfertra_B-If Pref_B+≥Ptra_B-, then changed described The active power reference value of stream station B cathode transverters is revised as Plim_B-；If Pref_B+<Ptra_B-, then by the current conversion station B cathode The active power reference value of transverter is revised as Pref_B-+Pref_B+；
Calculate the active power of the positive transverter transfer of cathode transverter reception of receiving end current conversion station A corresponding with current conversion station B Second maximum value Ptra_A-If Ptra_A->Ptra_B-, then the cathode transverter active power reference value of current conversion station A is revised as Pref_A-+Ptra_B-, and the positive transverter active power reference value of the current conversion station A is revised as Pref_A+-Ptra_B-；If Ptra_B-≥Ptra_A-, then the cathode transverter active power reference value of the current conversion station A is revised as Plim_A-, and will it is described by The positive transverter active power reference value of end current conversion station A is revised as Pref_A+-Ptra_A-；
If Pref_B+<Ptra_A-, then the cathode transverter active power reference value of receiving end current conversion station A is revised as Pref_A-+Pref_B+, And the active power reference value of the positive transverter of receiving end current conversion station A is revised as Pref_A+-Pref_B+；If Pref_B+≥Ptra_A-, The cathode transverter active power reference value of the current conversion station A is then revised as Plim_A-, and just by the receiving end current conversion station A Pole transverter active power reference value is revised as Pref_A+-Ptra_A-；
The active power of sending end current conversion station C remains unchanged, the current conversion station D in DC voltage control pattern in receiving end current conversion station Active power self-balancing.
9. flexible direct current power grid according to claim 7, which is characterized in that setting current conversion station A positive and negative anodes transverters are active Value and power reference is respectively Pref_A+、Pref_A-, current conversion station A positive and negative anodes transverter active power limit values are Plim_A+、Plim_A-, the change of current B positive and negative anodes transverter active power reference values of standing are respectively Pref_B+、Pref_B-, current conversion station B positive and negative anodes transverter active power limit Value is Plim_B+、Plim_B-, current conversion station C positive and negative anodes transverter active power reference values are respectively Pref_C+、Pref_C-, current conversion station C is just Cathode transverter active power limit value is Plim_C+、Plim_C-；
If active power receiving end current conversion station A anode converter faults are out of service, calculating current conversion station A cathode transverter can connect Receive the second maximum value P of the active power of positive transverter transfertra_A-If Pref_A+≥Ptra_A-, then current conversion station A cathode are changed The active power reference value of stream device is revised as Plim_A-；If Pref_A+<Ptra_A-, then the active power of the cathode transverter is joined It examines value and is revised as Pref_A-+Pref_A+；
Calculate the active power of the positive transverter transfer of cathode transverter reception of sending end current conversion station B corresponding with current conversion station A First maximum value Ptra_B-If Ptra_A-≥Ptra_B-, then current conversion station B cathode transverter active power reference values are revised as Plim_B-, current conversion station B anode transverter active power reference values are revised as Pref_B+-Ptra_B-；If Ptra_A-<Ptra_B-, then by the change of current B cathode transverter active power reference values of standing are revised as Pref_B-+Ptra_A-, by current conversion station B anode transverter active power references Value is revised as Pref_B+-Ptra_A-；
The third for the active power that the cathode transverter for calculating active power sending end current conversion station C receives positive transverter transfer is maximum Value Ptra_C-If Ptra_A--Ptra_B-≥Ptra_C-, then current conversion station C cathode transverter active power reference values are revised as Plim_C-, Current conversion station C anode transverter active power reference values are revised as Pref_C+-Ptra_C-If Ptra_A--Ptra_B-<Ptra_C-, then will change Stream station C cathode transverter active power reference values are revised as Pref_C-+(Ptra_A--Ptra_B-), current conversion station C anode transverters are had Work(value and power reference is revised as Pref_C+-(Ptra_A--Ptra_B-)；
If Pref_A+≥Ptra_B-, then current conversion station B cathode transverter active power reference values are revised as Plim_B-, just by current conversion station B Pole transverter active power reference value is revised as Pref_B+-Ptra_B-；If Pref_A+<Ptra_B-, then current conversion station B cathode transverters are had Work(value and power reference is revised as Pref_B-+Ptra_A-, current conversion station B anode transverter active power reference values are revised as Pref_B+- Ptra_A-；
If Pref_A+-Ptra_B-≥Ptra_C-, then current conversion station C cathode transverter active power reference values are revised as Plim_C-, will change Stream station C anode transverter active power reference values are revised as Pref_C+-Ptra_C-If Pref_A+-Ptra_B-<Ptra_C-, then by current conversion station C cathode transverter active power reference values are revised as Pref_C-+(Ptra_A--Ptra_B-), by current conversion station C anode transverter wattful powers Rate reference value is revised as Pref_C+-(Ptra_A--Ptra_B-)；
The active power self-balancing of current conversion station D in DC voltage control pattern in receiving end current conversion station.
10. flexible direct current power grid according to claim 7, which is characterized in that setting current conversion station A positive and negative anodes transverters are active Value and power reference is respectively Pref_A+、Pref_A-, current conversion station A positive and negative anodes transverter active power limit values are Plim_A+、Plim_A-, the change of current B positive and negative anodes transverter active power reference values of standing are respectively Pref_B+、Pref_B-, current conversion station B positive and negative anodes transverter active power limit Value is Plim_B+、Plim_B, current conversion station C positive and negative anodes transverter active power reference values are respectively Pref_C+、Pref_C-, current conversion station C is just Cathode transverter active power limit value is Plim_C+、Plim_C-, current conversion station D positive and negative anodes transverter active power reference values are respectively Pmea_D+、Pmea_D-, current conversion station D positive and negative anodes transverter active power limit values are Plim_D+、Plim_D-；
If DC voltage receiving end current conversion station D anode converter faults are out of service, active power corresponding with current conversion station D is calculated The corresponding cathode transverters of sending end current conversion station C receive the active power third maximum value P of positive transverter transfertra_C-If Pmea_D+≥Ptra_C-, then current conversion station C cathode transverter active power reference values are revised as Plim_C-, by the current conversion station C anode changes of current Device active power reference value is revised as Pref_C+-Ptra_C-If Pmea_D+<Ptra_C-, then by current conversion station C cathode transverter active power Reference value is revised as Pref_C-+Pmea_D+, current conversion station C anode transverter active power reference values are revised as Pref_C+-Pmea_D+；
Calculate active power sending end current conversion station B cathode transverter can receive the transfer of positive transverter active power first most Big value Ptra_B-If Pmea_D+-Ptra_C-≥Ptra_B-, then the active power reference value of current conversion station B cathode transverters is revised as Plim_B-, the active power reference value of current conversion station B anode transverters is revised as Pref_B+-Ptra_B-；If Pmea_D+-Ptra_C-< Ptra_B-, then the active power reference value of current conversion station B cathode transverters is revised as Pref_B-+(Pmea_D+-Ptra_C-), by current conversion station The active power reference value of B anode transverters is revised as Pref_B+-(Pmea_D+-Ptra_C-)；If Ptra_C-≥Ptra_A-, then by the change of current A cathode transverter active power reference values of standing are revised as Plim_A-, current conversion station A anode transverter active power self-balancings, if Ptra_C-<Ptra_A-, then current conversion station A cathode transverter active power reference values are revised as Plim_A-+Ptra_C-, current conversion station A anodes Transverter active power self-balancing；If Pmea_D+≥Ptra_A-, then current conversion station A cathode transverter active power reference values are revised as Plim_A-, otherwise current conversion station A anode transverter active power self-balancings repair current conversion station A cathode transverter active power reference values It is changed to Pref_A-+Pmea_D, current conversion station A anode transverter active power self-balancings；Current conversion station D cathode transverters active power is certainly flat Weighing apparatus.
CN201810265194.6A 2018-03-28 2018-03-28 A kind of active power controller method when converter fault and flexible direct current power grid Pending CN108418228A (en)

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CN109494779B (en) * 2018-10-26 2022-03-04 中国电力科学研究院有限公司 Method and system for acquiring locking fault measure quantity of converter of flexible direct current power grid
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CN109494780A (en) * 2018-11-19 2019-03-19 全球能源互联网研究院有限公司 A kind of DC transmission system power turns for method and system
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CN109802428A (en) * 2018-12-24 2019-05-24 中国电力科学研究院有限公司 A kind of soft straight power grid Safety system converter station locking failure measure amount calculating method and system
CN109888843A (en) * 2019-02-28 2019-06-14 中国电力科学研究院有限公司 A kind of power regulating method and system of extensive new energy access DC grid
CN110460083A (en) * 2019-07-23 2019-11-15 许继电气股份有限公司 LCC-VSC DC transmission system power coordination control method and device
CN110365037B (en) * 2019-07-23 2020-12-18 许继电气股份有限公司 Power coordination control method and device for LCC-VSC direct current transmission system
CN110365036B (en) * 2019-07-23 2020-12-18 许继电气股份有限公司 Power coordination control method and device for LCC-VSC direct current transmission system
CN110365036A (en) * 2019-07-23 2019-10-22 许继电气股份有限公司 A kind of the power coordination control method and device of LCC-VSC DC transmission system
CN110460083B (en) * 2019-07-23 2022-08-30 许继电气股份有限公司 Power coordination control method and device for LCC-VSC direct current transmission system
CN110365037A (en) * 2019-07-23 2019-10-22 许继电气股份有限公司 The power coordination control method and device of LCC-VSC DC transmission system
CN111600327A (en) * 2020-05-27 2020-08-28 国网陕西省电力公司 Coordination control method suitable for flexible direct current power distribution system
CN111600327B (en) * 2020-05-27 2022-04-15 国网陕西省电力公司 Coordination control method suitable for flexible direct current power distribution system

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