CN101359827A - Control method for SVC to cooperate with DC system operation in converter station - Google Patents
Control method for SVC to cooperate with DC system operation in converter station Download PDFInfo
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- CN101359827A CN101359827A CNA2007103019832A CN200710301983A CN101359827A CN 101359827 A CN101359827 A CN 101359827A CN A2007103019832 A CNA2007103019832 A CN A2007103019832A CN 200710301983 A CN200710301983 A CN 200710301983A CN 101359827 A CN101359827 A CN 101359827A
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- svc
- current
- reactive power
- conversion station
- convertor station
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
Disclosed is a control method that real-time controls a reactive power crossing-over value between a convertor station and an alternating-current system, suppresses current commutation generatrix transient voltage fluctuation caused by filter switching and coordinates with stable operation of direct-current system through an SVC. A voltage-measuring instrument and a current-measuring instrument are arranged at the outgoing line point of the convertor station to conduct instantaneous reactive power calculation. When the current commutation generatrix switches the filter, the reactive power crossing-over value between the convertor station and the alternating-current and direct-current system changes suddenly, a TRC agile and quick regulating function in the SVC is used to quickly change the SVC reactive power output situation, reduce sudden change value of the reactive power crossing-over value between the convertor station and the alternating-current and direct-current system, and reduce current commutation generatrix transient voltage fluctuation. The method can be utilized in control strategy adopted by SVC when the SVC is disposed in the convertor station.
Description
Technical field
When the present invention relates in current conversion station, SVC is installed, the control method that SVC should take.
Background technology
In the DC transmission engineering of present transregional networking, the AC system that some current conversion station inserts is very weak, when adopting conventional direct current transportation technology, owing to cause that the transient voltage fluctuation of change of current bus can not the overshoot requirement during filter switching, cause the filter group capacity very little, need a large amount of filter groupings, cause current conversion station to take up an area of and increase, economy reduces.At current conversion station SVC is installed, utilizes the SVC fast and flexible to regulate the ability of reactive power, can effectively improve the filter group capacity.Install in current conversion station that SVC is domestic still not to have an actual engineering precedent.In the back-to-back DC power transmission engineering of China-Russian Heihe, SVC has been installed in order to improve the filter group capacity in Chinese side, the control method of SVC in the current conversion station has been proposed.
For main wiring mode as shown in Figure 1, SVC is installed in 500kV/220kV contact commutator transformer low pressure 35kV side.By the voltage and current measurement mechanism being installed, can measure the instantaneous reactive power that exchanges between current conversion station and the AC system fast at A point and B point.Ability by the flexible quick adjustment reactive power of SVC is exerted oneself effectively suppresses the transient swing of change of current busbar voltage, guarantees the direct current system even running.
Summary of the invention
The object of the present invention is to provide the control method of SVC in a kind of current conversion station of practicality.The voltage and current measurement mechanism is installed in utilization in the current conversion station outlet, can measure the instantaneous reactive power that exchanges between current conversion station and the AC system fast.Ability by the flexible quick adjustment reactive power of SVC is exerted oneself effectively suppresses the transient swing of change of current busbar voltage, guarantees the direct current system even running.When the present invention can be used in the current conversion station SVC being installed, the control method that SVC adopts.
Description of drawings
Accompanying drawing 1 is the system wiring figure that SVC is installed in current conversion station.
Wherein (1) is sending end current conversion station ac bus;
(2) be the wiring of direct current system part;
(3) be receiving end current conversion station ac bus;
(4) be 500kV outlet high voltage reactor;
(5) be system interconnection transformer 220kV side bus;
(6) be system interconnection transformer 35kV side bus;
(7) be FC among the SVC (fixed capacitor);
(8) be TCR among the SVC (controlled reactor);
(9) 220kV transformer station;
(10) 500kV transformer station;
(11) 500kV circuit;
(12) 220kV circuit;
(A) 500kV outlet measurement mechanism;
(B) 220kV place measurement mechanism.
Embodiment
For main wiring mode as shown in Figure 1, SVC is installed in 500kV/220kV contact commutator transformer low pressure 35kV side.By the voltage and current measurement mechanism being installed, can measure the instantaneous reactive power that exchanges between current conversion station and the AC system fast at A point and B point.By the ability that the flexible quick adjustment reactive power of SVC is exerted oneself, the reactive power variable quantity when reducing the filter switching between current conversion station and the AC system effectively suppresses the transient swing of change of current busbar voltage, guarantees the direct current system even running.
Adopt this method, by reactive power variable quantity between control current conversion station and the AC system, change of current bus transient voltage undulate quantity in the time that the filter switching can effectively being reduced.When DC engineering designs, can adopt the method that SVC is installed in the current conversion station to improve the filter group capacity, reduce floor space, reduce project cost simultaneously.
Claims (2)
1, the control method that SVC cooperates direct current system to move in a kind of current conversion station, it is characterized in that: in current conversion station, utilize the SVC quick adjustment to absorb and send the ability of reactive power, absorb the superfluous down reactive power of direct current low power mode, the busbar voltage fluctuation that the rejects trap switching causes when direct current power changes ensures the direct current system safe and stable operation.
2, according to claim 1, it is characterized in that: SVC is installed in current conversion station, controls reactive power exchange value between current conversion station and the AC system in real time, suppress the transient swing of change of current busbar voltage, guarantee the steady transmission power of direct current system by SVC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103019832A CN101359827A (en) | 2007-12-24 | 2007-12-24 | Control method for SVC to cooperate with DC system operation in converter station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103019832A CN101359827A (en) | 2007-12-24 | 2007-12-24 | Control method for SVC to cooperate with DC system operation in converter station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101359827A true CN101359827A (en) | 2009-02-04 |
Family
ID=40332194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103019832A Pending CN101359827A (en) | 2007-12-24 | 2007-12-24 | Control method for SVC to cooperate with DC system operation in converter station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101359827A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545814A (en) * | 2013-09-24 | 2014-01-29 | 国家电网公司 | Coordinated voltage control method for alternating-current and direct-current hybrid power system |
| CN104333012A (en) * | 2014-11-06 | 2015-02-04 | 国家电网公司 | Multi-feed flexible DC transmission reactive power control method and device |
-
2007
- 2007-12-24 CN CNA2007103019832A patent/CN101359827A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545814A (en) * | 2013-09-24 | 2014-01-29 | 国家电网公司 | Coordinated voltage control method for alternating-current and direct-current hybrid power system |
| CN104333012A (en) * | 2014-11-06 | 2015-02-04 | 国家电网公司 | Multi-feed flexible DC transmission reactive power control method and device |
| CN104333012B (en) * | 2014-11-06 | 2016-08-10 | 国家电网公司 | A kind of many feed-ins flexible DC power transmission reactive power control method and device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090204 |