CN108493980A - A kind of flexible direct current network re-active power control method for coordinating and system - Google Patents
A kind of flexible direct current network re-active power control method for coordinating and system Download PDFInfo
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- CN108493980A CN108493980A CN201810267225.1A CN201810267225A CN108493980A CN 108493980 A CN108493980 A CN 108493980A CN 201810267225 A CN201810267225 A CN 201810267225A CN 108493980 A CN108493980 A CN 108493980A
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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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- 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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Abstract
The present invention relates to a kind of flexible direct current network re-active power control method for coordinating and systems, belong to flexible direct current electric power network technique field.The present invention is exited in a wherein DC line fault for active power sending end to active power receiving end, when the dc circuit breaker of an other DC line being caused to overload, in order to avoid the damage of dc circuit breaker leads to flexible direct current mains breakdown, according to each current conversion station positive and negative anodes transverter DC current measured value, DC voltage measured value, active power reference value, active power limits value, converter deblocking state, failure locking state and active power/DC voltage control pattern redistribute the positive and negative anodes active power of each current conversion station, the stable operation under new active power balance of flexible direct current power grid is ensured, to realize protection dc circuit breaker, improve the active power utilization ratio of flexible direct current network system.
Description
Technical field
The present invention relates to a kind of flexible direct current network re-active power control method for coordinating and systems, belong to flexible direct current power grid
Technical field.
Background technology
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.Flexible direct current power grid system
Converter valve of uniting uses semi-bridge type MMC topological structures, the dc circuit breaker for being generally based on power electronic technique to carry out isolated DC line
Road failure.When being run under flexible direct current power grid standard condition, flexible direct current electric network swim direction is from active power sending end to active
Power receiving end, when a wherein DC line fault for active power sending end to active power receiving end exits, flexible direct current electricity
Net topology structure is changed into open loop operation by loop-net operation, and the electric current of multiple active power sending ends is flowed to same trend flow direction
On DC line, and the dc circuit breaker overload current ability based on power electronic technique is limited, leads to the damage of dc circuit breaker
It is bad, so that entire flexible direct current mains breakdown, influences the normal use of user.
Invention content
The object of the present invention is to provide a kind of flexible direct current network re-active power control method for coordinating, to solve current multiterminal
Cause directly when a wherein DC line fault for active power sending end to active power receiving end exits in flexible direct current power grid
Flow the problem of breaker damage is to influence entire flexible direct current network system；The present invention also provides a kind of flexible direct current power grids
Active power coordinated control system.
In order to solve the above technical problems, the present invention provides a kind of flexible direct current network re-active power control method for coordinating,
The control method includes the following steps：
1) when any dc circuit breaker overloads in flexible direct current power grid, it is straight to acquire each current conversion station positive and negative anodes transverter
Galvanic electricity stream measured value, active power reference value, active power limits value, converter deblocking state, failure locking state and active
Power/DC voltage control pattern；
2) it is limited according to each current conversion station positive and negative anodes transverter DC current measured value, active power reference value, active power
Value, converter deblocking state, failure locking state and active power/DC voltage control pattern adjust each current conversion station positive and negative anodes
The active power reference value of transverter.
The present invention can when dc circuit breaker overloads, according to each current conversion station positive and negative anodes transverter DC current measured value,
DC voltage measured value, active power reference value, active power limits value, converter deblocking state, failure locking state and have
Work(power/DC voltage control pattern redistributes the positive and negative anodes active power of each current conversion station, avoids the damage of dc circuit breaker
It is bad to lead to flexible direct current mains breakdown, the stable operation under new active power balance of flexible direct current power grid is ensured, to real
Dc circuit breaker is now protected, the active power utilization ratio of flexible direct current network system is improved.
Further, The present invention gives the Rule of judgment of dc circuit breaker overload, dc circuit breaker in the step 1)
There is overload to refer to：When active power sending end transverter connect active power receiving end transverter in circuit break down by every
From rear, the practical measurement of current value of each current conversion station positive and negative anodes transverter is obtained, judges the sum of the practical measurement of current value of all sending end transverters
Whether breaker overload current threshold value is more than, if more than then illustrating that breaker overloads.
Further, The present invention gives the concrete configuration modes of sending end transverter active power reference value, if direct current
There are two sending end and two receiving ends in net, go out when a sending end anode transverter connects the circuit in active power receiving end transverter
When existing failure causes breaker to overload, the active power reference value configuration process of another sending end positive and negative anodes transverter is：
Judge [(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+＞ Ptra_C-Whether meet, if satisfied, then by another sending end
The active power reference value of cathode transverter is set as its active power limits value Plim_C-, another sending end anode transverter
Active power reference value, which is set as its positive active power reference value, can receive the active power energy of anode transfer with its cathode
The difference of power；If not satisfied, then setting the active power reference value of another sending end cathode transverter to Pref_C-+[(Imea_C+
+Imea_B+)-IDCB_thre]*Umea_C+, the active power reference value of another sending end anode transverter is set as Pref_C+-[(Imea_C+
+Imea_B+)-IDCB_thre]*Umea_C+；Wherein IDCB_threFor dc circuit breaker overload current threshold value, Imea_C+、Imea_C-Respectively
The direct current measured value of another sending end transverter positive and negative electrode, Umea_C+For the voltage measured value of another sending end transverter anode,
Ptra_C-It can receive the active power ability of anode transfer, I for another sending end transverter cathodemea_B+It breaks down for circuit
Sending end transverter positive DC practical measurement of current value, Pref_C-For another sending end transverter cathode active power reference value.
Further, The present invention gives the concrete configuration modes of receiving end active power reference value, if having in DC grid
Two sending ends and two receiving ends, when the circuit failure that a sending end anode transverter is connected in receiving end transverter causes to break
When the device overload of road, the positive and negative transverter active power reference value configuration process of the receiving end is：
Judge [(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+＞ Ptra_A-Whether meet, if satisfied, the receiving end cathode is changed
Stream device active power reference value is set as Pref_A-+[(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+, which has
Work(value and power reference is set as Pref_A+-[(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+；If not satisfied, the receiving end cathode is changed
Stream device active power reference value is set as its active power limits value Plim_A-, by the receiving end anode transverter active power reference
Value is set as Pref_A+-Ptra_A-；Wherein Ptra_A-It can receive the active power energy of anode transfer for the receiving end transverter cathode
Power, Pref_A+、Pref_A-The respectively receiving end transverter positive and negative electrode active power reference value.
Further, at least one positive and negative anodes transverter works in DC voltage control pattern in the DC grid.
The present invention also provides a kind of flexible direct current network re-active power coordinated control system, which is used for
Each current conversion station positive and negative anodes converter Control system in DC grid is connected, it is real to obtain each current conversion station positive and negative anodes transverter DC current
Measured value, active power reference value, active power limits value, converter deblocking state, failure locking state and active power/direct current
Voltage mode control is limited according to each current conversion station positive and negative anodes transverter DC current measured value, active power reference value, active power
Value, converter deblocking state, failure locking state and active power processed/DC voltage control pattern are positive and negative to adjust each current conversion station
The active power reference value of pole transverter, and the active power reference value of each current conversion station positive and negative anodes transverter after adjustment is sent
To each current conversion station positive and negative anodes converter Control system.
Further, the dc circuit breaker occurs overloading and refer to：When active power sending end transverter connects wattful power
After circuit failure in rate receiving end transverter is isolated, the practical measurement of current value of each current conversion station positive and negative anodes transverter is obtained, is sentenced
Whether the sum of practical measurement of current value of disconnected all sending end transverters is more than breaker overload current threshold value, if more than then explanation is disconnected
Road device overloads.
Further, if there are two sending end and two receiving ends in DC grid, when a sending end anode transverter is connected with
When circuit failure in work(power receiving end transverter causes breaker to overload, the coordinated control system is to another sending end
The configuration process of the active power reference value of positive and negative anodes transverter is：
Judge [(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+＞ Ptra_C-Whether meet, if satisfied, then by another sending end
The active power reference value of cathode transverter is set as its active power limits value Plim_C-, another sending end anode transverter
Active power reference value, which is set as its positive active power reference value, can receive the active power energy of anode transfer with its cathode
The difference of power；If not satisfied, then setting the active power reference value of another sending end cathode transverter to Pref_C-+[(Imea_C+
+Imea_B+)-IDCB_thre]*Umea_C+, the active power reference value of another sending end anode transverter is set as Pref_C+-[(Imea_C+
+Imea_B+)-IDCB_thre]*Umea_C+；Wherein IDCB_threFor dc circuit breaker overload current threshold value, Imea_C+、Imea_C-Respectively
The direct current measured value of another sending end transverter positive and negative electrode, Umea_C+For the voltage measured value of another sending end transverter anode,
Ptra_C-It can receive the active power ability of anode transfer, I for another sending end transverter cathodemea_B+It breaks down for circuit
Sending end transverter positive DC practical measurement of current value, Pref_C-For another sending end transverter cathode active power reference value.
Further, if there are two sending end and two receiving ends in DC grid, when a sending end anode transverter is connected with
When circuit failure in receiving end transverter causes breaker to overload, the coordinated control system is to the positive and negative transverter of the receiving end
The configuration process of active power reference value is：
Judge [(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+＞ Ptra_A-Whether meet, if satisfied, the receiving end cathode is changed
Stream device active power reference value is set as Pref_A-+[(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+, which has
Work(value and power reference is set as Pref_A+-[(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+；If not satisfied, the receiving end cathode is changed
Stream device active power reference value is set as its active power limits value Plim_A-, by the receiving end anode transverter active power reference
Value is set as Pref_A+-Ptra_A-；Wherein Ptra_A-It can receive the active power energy of anode transfer for the receiving end transverter cathode
Power, Pref_A+、Pref_A-The respectively receiving end transverter positive and negative electrode active power reference value.
Further, at least one positive and negative anodes transverter works in DC voltage control pattern in the DC grid.
Description of the drawings
Fig. 1 is the topologies schematic diagram of flexible direct current power grid；
Fig. 2 is current conversion station active power coordinated control system and converter Control system data interaction concept figure；
Fig. 3 is the flow chart of flexible direct current network re-active power control method for coordinating in the embodiment of the present invention.
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings.
The embodiment of the flexible direct current network re-active power control method for coordinating of the present invention
The targeted flexible direct current power grid of the present invention is as shown in Figure 1, include current conversion station A, current conversion station B, current conversion station C and the change of current
Stand D, and wherein current conversion station A and turn of tidal stream station D are active power receiving end, and current conversion station B and current conversion station C are active power sending end, current conversion station D
Positive and negative anodes converter Control system control model is DC voltage control pattern, remaining current conversion station positive and negative anodes converter Control system
Control model of uniting is active power controller pattern.Each current conversion station positive and negative anodes transverter uses half-bridge MMC topological structures, AC line
Road is attached by dc circuit breaker and adjacent current conversion station, by pulling open the direct current at DC line both ends when DC line fault
Breaker promptly isolates DC line fault.Acquire the positive and negative anodes DC voltage measured value of each current conversion station, DC current measured value,
Active power reference value and limits value.
It, may after a certain line fault of active power sending end transverter connection active power receiving end transverter is isolated
Dc circuit breaker on another DC line is caused to overload.Below with the direct current for B anode transverter docking station A anode transverters of standing
Line fault illustrates for exiting, and wherein dc circuit breaker overload current threshold value is IDCB_thre, the direct current for A positive and negative anodes of standing
Voltage measured value, DC current measured value, active power reference value and limits value are respectively Umea_A+、Umea_A-、Imea_A+、
Imea_A-、Pref_A+、Pref_A-、Plim_A+And Plim_A-；It stands the DC voltage measured value of B positive and negative anodes, DC current measured value, active
Value and power reference and limits value are respectively Umea_B+、Umea_B-、Imea_B+、Imea_B-、Pref_B+、Pref_B-、Plim_B+And Plim_B-；Stand C
DC voltage measured value, DC current measured value, active power reference value and the limits value of positive and negative anodes are respectively Umea_C+、
Umea_C-、Imea_C+、Imea_C-、Pref_C+、Pref_C-、Plim_C+And Plim_C-；Since station D positive and negative anodes converter Control systems are direct current
Voltage mode control (acquiescence direct voltage reference value is 1.0pu) control flexible direct current power grid DC voltage stability, has active
Power Self-balancing, active power reference value, that is, real-time measurement values, DC voltage measured value, the DC current of D positive and negative anodes of standing
Measured value, active power reference value and limits value are respectively Umea_D+、Umea_D-、Imea_D+、Imea_D-、Pmea_D+、Pmea_D-、Plim_D+
And Plim_D-.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
The active power ability that cathode can receive anode transfer is Ptra_C-=Plim_C--Pref_C-, current conversion station A cathode can receive just
The active power ability of pole transfer is Ptra_A-=Plim_A--Pref_A-, current conversion station D positive and negative anodes active power self-balancings.Work as current conversion station
The DC line fault of the positive best current conversion station A anodes of B exits, and current conversion station B anodes and current conversion station C anode electric currents confluence are in current conversion station
On the DC line of the positive best current conversion station D anodes of C, specific control flow is as shown in Figure 3.It is as follows：
1. judging whether to overload.
Judge whether the sum of current conversion station C anode practical measurement of current values and current conversion station B anode practical measurement of current values are more than direct current interruption
Device overload current threshold value, i.e. Imea_C++Imea_B+＞ IDCB_threWhether meet, illustrates to need to redistribute each change of current if meeting
The positive and negative anodes active power reference value stood, is not otherwise reprocessed.
2. configuring current conversion station C positive and negative anodes active power reference values.
It calculates the sum of current conversion station C anode practical measurement of current values and current conversion station B anode practical measurement of current values and subtracts dc circuit breaker mistake
The difference for carrying electric current threshold value is multiplied by current conversion station C cathode voltage measured values, and result of calculation and current conversion station C cathode can be received just
The active power ability of pole transfer is compared, i.e. [(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+＞ Ptra_C-.If above formula is full
Foot, then set current conversion station C cathode active power reference values to active power limit Plim_C-, current conversion station C anode active power
Reference value, which is set as current conversion station C anodes active power reference value and current conversion station C cathode, can receive the active power of anode transfer
The difference of ability；If [(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+＞ Ptra_C-It is unsatisfactory for, then it is active to control current conversion station C cathode
Value and power reference is Pref_C-+[(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+, control current conversion station C anode active power reference values
For Pref_C+-[(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+。
3. configuring current conversion station B positive and negative anodes active power reference values.
If [(Imea_C++Imea_B+-Ptra_C-/Umea_C+)-IDCB_thre]*Umea_B+＞ Ptra_B-It is unsatisfactory for, then controls current conversion station B
Cathode active power reference value is Pref_C-+[(Imea_C++Imea_B+-Ptra_C-/Umea_C+)-IDCB_thre]*Umea_B-, control current conversion station
B anode active power reference values are Pref_C+-[(Imea_C++Imea_B+-Ptra_C-/Umea_C+)-IDCB_thre]*Umea_B-。
4. adjusting current conversion station C positive and negative anodes active power reference values.
It calculates the sum of current conversion station C anodes measured current and current conversion station B anode measured current values and subtracts current conversion station C positive references
Electric current and dc circuit breaker overload current threshold value, judge whether the difference of the two is more than current conversion station B cathode active power references
The ratio of value and current conversion station B anode measurement voltage values, i.e. [(Imea_C++Imea_B+-Ptra_C-/Umea_C+)-IDCB_thre]*Umea_B+＞
Ptra_B-Whether meet, if satisfied, it is current conversion station B cathode active power limits values P then to control current conversion station B cathode ginseng valueslim_B-, control
Current conversion station B positive reference values processed are revised as Pref_B+-Ptra_B-, control current conversion station C positive reference values are Pref_C+-Ptra_C--
{[(Imea_C++Imea_B+-Ptra_C-/Umea_C+)-IDCB_thre]*Umea_B+-Ptra_B-}。
5. configuring current conversion station A positive and negative electrode active power reference values.
Judge [(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+＞ Ptra_A-Whether meet, if satisfied, then bearing current conversion station A
Pole reference value is set as Pref_A-+[(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+, then set current conversion station A positive reference values to
Pref_A+-[(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+；If not satisfied, then setting current conversion station A ground references to current conversion station
A cathode active power limits values Plim_A-, set current conversion station A positive reference values to Pref_A+-Ptra_A-。
6. configuring current conversion station D value and power references.
Since current conversion station D is DC voltage control pattern, so current conversion station D positive and negative anodes active power self-balancings.
The embodiment of flexible direct current network re-active power coordinated control system of the present invention
The coordinated control system of the present invention is obtained for connecting each current conversion station positive and negative anodes converter Control system in DC grid
Take each current conversion station positive and negative anodes transverter DC current measured value, DC voltage measured value, active power reference value, active power limit
Value, converter deblocking state, failure locking state and active power processed/DC voltage control pattern, and just according to each current conversion station
Cathode transverter DC current measured value, active power reference value, active power limits value, converter deblocking state, failure are closed
Lock status and active power/DC voltage control pattern adjust the active power reference value of each positive and negative anodes transverter of current conversion station,
And the active power reference value of the current conversion station positive and negative anodes transverter after adjustment and actuating signal are sent to each current conversion station positive and negative anodes
Converter Control system.
As shown in Fig. 2, according to the topological structure of flexible direct current power grid, this law individually sets up current conversion station active power and coordinates control
System processed, the system and the positive and negative anodes converter Control system of each current conversion station use point-to-point fiber optic communication respectively, use
IEC61850 international standard protocols.Current conversion station active power coordinated control system and each current conversion station positive and negative anodes converter Control
System carries out data interaction, and the analog signals that converter Control system gives current conversion station active power coordinated control system are straight
Galvanic electricity compacting measured value, DC current measured value, transverter active power reference value and active power limits value, state quantity signal are
Converter deblocking state, failure locking state and active power/DC voltage control pattern；Converter Control system receives the change of current
The analog signals of active power of standing coordinated control system are transverter active power reference value after calculating, and state quantity signal is to change
Current conversion station active power coordinated control system actuating signal.
When current conversion station active power coordinated control system receives a certain dc circuit breaker overload, locks and be currently received
Analog quantity (the locking time T that each current conversion station positive and negative anodes converter Control system is brought0), while triggering current conversion station active power
Coordinated control system actuating signal (duration T0), and carry out interrelated logic judgement.Current conversion station active power coordinates control system
The active power reference value and current conversion station that system is distributed each current conversion station positive and negative anodes converter Control system calculated are active
Cooperation control system of power actuating signal, while being handed down to each current conversion station positive and negative anodes converter Control system.Each current conversion station is positive and negative
Pole converter Control system receives the active power reference value that current conversion station active power coordinated control system is brought, and foundation
Current conversion station active power coordinated control system actuating signal changes converter Control system active power reference value.Each current conversion station
The stable operation under new power-balance of positive and negative anodes network waits for that DC line fault is disposed and then secondary input forms ring
Network operation re-issues each current conversion station positive and negative anodes active power reference value by scheduling, and it is flat to be finally reached positive and negative interpolar active power
Weighing apparatus operation.
By taking the DC grid in Fig. 1 as an example, D positive and negative anodes converter Control system control models of standing are DC voltage control
Pattern, the remaining positive and negative converter Control system control model of current conversion station is active power controller pattern；The B and station C that stands is active
Power sending end, the A and station D that stands is active power receiving end.It stands the DC voltage measured value of A positive and negative anodes, DC current measured value, active
Value and power reference and limits value are respectively Umea_A+、Umea_A-、Imea_A+、Imea_A-、Pref_A+、Pref_A-、Plim_A+And Plim_A-；Stand B
DC voltage measured value, DC current measured value, active power reference value and the limits value of positive and negative anodes are respectively Umea_B+、
Umea_B-、Imea_B+、Imea_B-、Pref_B+、Pref_B-、Plim_B+And Plim_B-；It stands DC voltage measured value, the DC current of C positive and negative anodes
Measured value, active power reference value and limits value are respectively Umea_C+、Umea_C-、Imea_C+、Imea_C-、Pref_C+、Pref_C-、Plim_C+
And Plim_C-；Since 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 DC voltage measured values of D positive and negative anodes of standing, DC current measured value, active power reference value and limits value difference
For Umea_D+、Umea_D-、Imea_D+、Imea_D-、Pmea_D+、Pmea_D-、Plim_D+And Plim_D-.The coordination control process of each current conversion station exists
It is described in detail in the embodiment of method, which is not described herein again.
The present invention is exited in a wherein DC line fault for active power sending end to active power receiving end, is caused in addition
When the dc circuit breaker overload of one DC line, in order to avoid the damage of dc circuit breaker leads to flexible direct current mains breakdown,
According to each current conversion station positive and negative anodes transverter DC current measured value, DC voltage measured value, active power reference value, active power
Limits value, converter deblocking state, failure locking state and active power/DC voltage control pattern redistribute each current conversion station
Positive and negative anodes active power, ensured the stable operation under new active power balance of flexible direct current power grid, to realize protection
Dc circuit breaker improves the active power utilization ratio of flexible direct current network system.
Claims (10)
1. a kind of flexible direct current network re-active power control method for coordinating, which is characterized in that the control method includes the following steps：
1) when any dc circuit breaker overloads in flexible direct current power grid, each current conversion station positive and negative anodes transverter direct current is acquired
Stream measured value, active power reference value, active power limits value, converter deblocking state, failure locking state and active power/
DC voltage control pattern；
2) according to each current conversion station positive and negative anodes transverter DC current measured value, active power reference value, active power limits value, change
Device unlocked state, failure locking state and active power/DC voltage control pattern are flowed to adjust each current conversion station positive and negative anodes change of current
The active power reference value of device.
2. flexible direct current network re-active power control method for coordinating according to claim 1, which is characterized in that the step
1) dc circuit breaker occurs overloading and refer in：When active power sending end transverter connects the line in active power receiving end transverter
After road failure is isolated, the practical measurement of current value of each current conversion station positive and negative anodes transverter is obtained, judges all sending end transverters
Whether the sum of practical measurement of current value is more than breaker overload current threshold value, if more than then illustrating that breaker overloads.
3. flexible direct current network re-active power control method for coordinating according to claim 1 or 2, which is characterized in that if straight
There are two sending end and two receiving ends in galvanic electricity net, when a sending end anode transverter connects the line in active power receiving end transverter
Road is broken down when breaker being caused to overload, and the active power reference value configuration process of another sending end positive and negative anodes transverter is：
Judge [(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+＞ Ptra_C-Whether meet, if satisfied, then by another sending end cathode
The active power reference value of transverter is set as its active power limits value Plim_C-, another sending end anode transverter it is active
Value and power reference, which is set as its positive active power reference value and its cathode, can receive the positive active power ability shifted
Difference；If not satisfied, then setting the active power reference value of another sending end cathode transverter to Pref_C-+[(Imea_C++
Imea_B+)-IDCB_thre]*Umea_C+, the active power reference value of another sending end anode transverter is set as Pref_C+-[(Imea_C++
Imea_B+)-IDCB_thre]*Umea_C+；Wherein IDCB_threFor dc circuit breaker overload current threshold value, Imea_C+、Imea_C-Respectively
The direct current measured value of another sending end transverter positive and negative electrode, Umea_C+For the voltage measured value of another sending end transverter anode,
Ptra_C-It can receive the active power ability of anode transfer, I for another sending end transverter cathodemea_B+It breaks down for circuit
Sending end transverter positive DC practical measurement of current value, Pref_C-For another sending end transverter cathode active power reference value.
4. flexible direct current network re-active power control method for coordinating according to claim 3, which is characterized in that if direct current
There are two sending end and two receiving ends in net, break down when a sending end anode transverter is connected with the circuit in receiving end transverter
When breaker being caused to overload, the positive and negative transverter active power reference value configuration process of the receiving end is：
Judge [(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+＞ Ptra_AWhether meet, if satisfied, by the receiving end cathode transverter
Active power reference value is set as Pref_A-+[(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+, the receiving end anode transverter wattful power
Rate reference value is set as Pref_A+-[(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+；If not satisfied, by the receiving end cathode transverter
Active power reference value is set as its active power limits value Plim_A-, which is set
It is set to Pref_A+-Ptra_A-；Wherein Ptra_A-It can receive the active power ability of anode transfer for the receiving end transverter cathode,
Pref_A+、Pref_A-The respectively receiving end transverter positive and negative electrode active power reference value.
5. flexible direct current network re-active power control method for coordinating according to claim 3, which is characterized in that the direct current
At least one positive and negative anodes transverter works in DC voltage control pattern in power grid.
6. a kind of flexible direct current network re-active power coordinated control system, which is characterized in that the coordinated control system is for connecting
Each current conversion station positive and negative anodes converter Control system in DC grid obtains each current conversion station positive and negative anodes transverter DC current actual measurement
Value, active power reference value, active power limits value, converter deblocking state, failure locking state and active power/direct current
Control model is pressed, is limited according to each current conversion station positive and negative anodes transverter DC current measured value, active power reference value, active power
Value, converter deblocking state, failure locking state and active power/DC voltage control pattern adjust each current conversion station positive and negative anodes
The active power reference value of transverter, and the active power reference value of each current conversion station positive and negative anodes transverter after adjustment is sent to
Each current conversion station positive and negative anodes converter Control system.
7. flexible direct current network re-active power coordinated control system according to claim 6, which is characterized in that the direct current
There is overload and refers in breaker：There is event when active power sending end transverter connects the circuit in active power receiving end transverter
After barrier is isolated, the practical measurement of current value of each current conversion station positive and negative anodes transverter is obtained, judges the practical measurement of current of all sending end transverters
Whether the sum of value is more than breaker overload current threshold value, if more than then illustrating that breaker overloads.
8. the flexible direct current network re-active power coordinated control system described according to claim 6 or 7, which is characterized in that if straight
There are two sending end and two receiving ends in galvanic electricity net, when a sending end anode transverter connects the line in active power receiving end transverter
Road is broken down when breaker being caused to overload, active power of the coordinated control system to another sending end positive and negative anodes transverter
The configuration process of reference value is：
Judge [(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+＞ Ptra_C-Whether meet, if satisfied, then by another sending end cathode
The active power reference value of transverter is set as its active power limits value Plim_C-, another sending end anode transverter it is active
Value and power reference, which is set as its positive active power reference value and its cathode, can receive the positive active power ability shifted
Difference；If not satisfied, then setting the active power reference value of another sending end cathode transverter to Pref_C-+[(Imea_C++
Imea_B+)-IDCB_thre]*Umea_C+, the active power reference value of another sending end anode transverter is set as Pref_C+-[(Imea_C++
Imea_B+)-IDCB_thre]*Umea_C+；Wherein IDCB_threFor dc circuit breaker overload current threshold value, Imea_C+、Imea_C-Respectively
The direct current measured value of another sending end transverter positive and negative electrode, Umea_C+For the voltage measured value of another sending end transverter anode,
Ptra_C-It can receive the active power ability of anode transfer, I for another sending end transverter cathodemea_B+It breaks down for circuit
Sending end transverter positive DC practical measurement of current value, Pref_C-For another sending end transverter cathode active power reference value.
9. flexible direct current network re-active power coordinated control system according to claim 8, which is characterized in that if direct current
There are two sending end and two receiving ends in net, break down when a sending end anode transverter is connected with the circuit in receiving end transverter
When breaker being caused to overload, configuration process of the coordinated control system to the positive and negative transverter active power reference value of the receiving end
For：
Judge [(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+＞ Ptra_A-Whether meet, if satisfied, by the receiving end cathode transverter
Active power reference value is set as Pref_A-+[(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+, the receiving end anode transverter wattful power
Rate reference value is set as Pref_A+-[(Imea_C++Imea_B+)-IDCB_thre]*Umea_C+；If not satisfied, by the receiving end cathode transverter
Active power reference value is set as its active power limits value Plim_A-, which is set
It is set to Pref_A+-Ptra_A-；Wherein Ptra_A-It can receive the active power ability of anode transfer for the receiving end transverter cathode,
Pref_A+、Pref_A-The respectively receiving end transverter positive and negative electrode active power reference value.
10. flexible direct current network re-active power coordinated control system according to claim 8, which is characterized in that described straight
At least one positive and negative anodes transverter works in DC voltage control pattern in galvanic electricity net.
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| CN109659965A (en) * | 2018-11-13 | 2019-04-19 | 许继电气股份有限公司 | A kind of flexible HVDC transmission system active power controller method and 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 |
| CN112054546A (en) * | 2019-06-05 | 2020-12-08 | 西安许继电力电子技术有限公司 | Power coordination method and device for multi-drop-point hybrid direct-current power transmission system and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109659965A (en) * | 2018-11-13 | 2019-04-19 | 许继电气股份有限公司 | A kind of flexible HVDC transmission system active power controller method and system |
| CN109659965B (en) * | 2018-11-13 | 2023-01-13 | 许继电气股份有限公司 | Active power control method and system for flexible direct current transmission system |
| CN112054546A (en) * | 2019-06-05 | 2020-12-08 | 西安许继电力电子技术有限公司 | Power coordination method and device for multi-drop-point hybrid direct-current power transmission system and storage medium |
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| 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 |
| 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 |
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