CN203481832U - Combination-type static reactive power compensation device - Google Patents
Combination-type static reactive power compensation device Download PDFInfo
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- CN203481832U CN203481832U CN201320562041.0U CN201320562041U CN203481832U CN 203481832 U CN203481832 U CN 203481832U CN 201320562041 U CN201320562041 U CN 201320562041U CN 203481832 U CN203481832 U CN 203481832U
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- thyristor
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- reactive power
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model discloses a combination-type static reactive power compensation device. Two ends of a line are connected with a power supply and a load. A thyristor control reactor, a thyristor switched capacitor and a fixed capacitor group are connected in parallel in the same line. The thyristor control reactor adopts an antiparallel thyristor and series reactor structure. The thyristor switched capacitor adopts an antiparallel thyristor and series capacitor structure. By using the combination-type static reactive power compensation device of the utility model, a total reactance value of the whole apparatus can be effectively adjusted; reactive power compensation and filtering functions are possessed.
Description
Technical field
The utility model relates to a kind of combined static reactive power compensator, belongs to electricity field.
Background technology
At present, the application of Static Var Compensator (SVC) can roughly be divided into two aspects: as system balance, be mainly used to improve electric power system voltage stability under large and small disturbance, this design reckons without load unbalanced problem, and not mentioned harmonic wave management method; As load compensation, be mainly used to suppress the voltage fluctuation that load variations causes, the reactive current that compensation load is required, improve the imbalance of power factor and compensation load, to industrial load, adopt TCR+FC type compensation arrangement to realize idle and load unbalanced compensation, the application in transmission system is not mentioned in this design, and on a large scale, continuously changes reactive power and idle character (capacitive or perception) aspect is limited.
Summary of the invention
Defect for prior art, the utility model discloses a kind of combined static reactive power compensator, can realize reactive power and regulate, the needs of the problem such as satisfied solution voltage fluctuation, power factor that at least 10kV power system voltage stabilization and power distribution network load cause is lower and load unbalanced.
For achieving the above object, the utility model is achieved through the following technical solutions:
Combined static reactive power compensator (SVC), circuit two ends are UNICOM's power supply and load respectively, in same circuit, be parallel with thyristor-controlled reactor, thyristor switchable capacitor, fixed capacitor group, wherein the single phase circuit of thyristor-controlled reactor adopts the structure of anti-parallel thyristor and series reactor, and the single phase circuit of thyristor switchable capacitor adopts the structure of anti-parallel thyristor and capacitor's series.
Preferably, described thyristor-controlled reactor is three-phase, adopts delta connection mode; Described thyristor switchable capacitor is three-phase, adopts star-star connection mode.
By foregoing circuit structure, thyristor-controlled reactor (thyristor controlled reactor, TCR) utilize the phase control of thyristor to change the size of current of reactor TCR, thereby change the reactance value of reactor under first-harmonic, infinitely regulate the total reactance value of SVC; Thyristor switchable capacitor (thyristor switched capacitor, TSC) adopts voltage over zero to trigger thyristor switchable capacitor group TSC, has level and regulates the total reactance value of SVC; Fixed capacitor group (fixed capacitor, FC) is taken into account the function of reactive power compensation and filtering.
In foregoing circuit structure, the capacitance of each several part can rationally regulate according to corresponding needs, preferably following parameter:
Described thyristor switchable capacitor is two groups, and every group of thyristor switchable capacitor capacity is identical; Thyristor-controlled reactor capacity is the twice of thyristor switchable capacitor, and fixed capacitor pool-size is identical with thyristor switchable capacitor.
Further, the capacitor of described thyristor series capacitor circuit is also connected with inductance, and this inductance is small inductor conventionally, and the impulse current that may cause while being used for suppression capacitor input electrical network is taken into account certain particular harmonic of filtering simultaneously.
Wherein, capacitor group FC is 5,7,11 single tuned filters, further can also be provided with bivalent high-pass filter.
Further, described device is also connected with control system, and described control system comprises signal processing circuit, is connected on circuit; The controller being connected with signal processing circuit, controller connects thyristor-controlled reactor, thyristor switchable capacitor by drive circuit.
By said structure, the voltage that signal processing circuit filtering collects and the harmonic wave in current signal obtain the fundamental signal of standard; Controller produces TCR, TSC control signal separately according to the output of signal processing circuit, by drive circuit, respectively TCR and TSC is carried out to control operation.
Combined static reactive-load compensator of the present utility model, can overcome the problems such as voltage fluctuation, power factor that power system voltage stabilization and power distribution network load causes are lower and load unbalanced, realize the various functions such as voltage stabilization, power factor correction, reactive power compensation and unbalance load compensation.
Accompanying drawing explanation
Fig. 1 is combined static reactive power compensator theory diagram of the present utility model.
Embodiment
Shown in accompanying drawing 1, shown that (in accompanying drawing, PT, CT are this area universal component, voltage transformer summation current transformer for the preferred implementation structure of SVC system of the present utility model; PCC is access reference point), comprise control system and reactive compensation system, wherein reactive compensation system comprises thyristor-controlled reactor (thyristor controlled reactor, TCR), 2 groups of thyristor switchable capacitor (thyristor switched capacitor, TSC), fixed capacitor group (fixed capacitor, FC).
The single phase circuit of TCR adopts the structure of anti-parallel thyristor and series reactor, three-phase TCR adopts delta connection mode, utilize the phase control of thyristor to change the size of current of reactor TCR, thereby change the reactance value of reactor under first-harmonic, infinitely regulate the total reactance value of SVC.
TSC adopts star-star connection mode, and single phase circuit adopts the structure of anti-parallel thyristor and capacitor's series, adopts voltage over zero to trigger thyristor switchable capacitor group TSC, has level and regulates the total reactance value of SVC.
For capacity arrangement, adopting TCR capacity is the form of TSC capacity twice, and FC capacity is identical with TSC, and every group of TSC capacity is identical.
Under circuit no-load condition, excise all TSC, TCR capacity will be enough to reduce the overvoltage that busbar voltage causes because of the charging of circuit capacitive.In circuit heavy load situation, due to not enough busbar voltage reduction, n group TSC and the FC compensation tie point capacitive reactive power merit power, thereby the busbar voltage that raises and reduce of making of reactive power of circuit transmission.FC takes into account the function of reactive power compensation and filtering.
In main circuit, TCR adopt delta connection with suppress 3k (k=1,2 ...) subharmonic inflow electrical network.On the capacitor C branch road of TSC, be connected in series the impulse current that may cause when small inductor L suppression capacitor drops into electrical network, take into account certain particular harmonic of filtering simultaneously.Fixed capacitor group FC is 5,7,11 single tuned filters.
Wherein control system comprises the signal processing circuit being connected on circuit, and the voltage that this circuit filtering collects and the harmonic wave in current signal, to obtain the fundamental signal of standard.The work of the detection principle of this signal processing circuit based on sliding window Fourier transform, thus amplitude and the phase place that can detect accurately fundamental signal under harmonic wave, frequency shift (FS) and disturbed noise at line voltage, contained.The fundamental signal that signal processing circuit extracts calculates reactive power fast by phase shift method, and calculates respectively power factor, and voltage effective value etc., export to controller and process.Controller calculates TCR, TSC control signal separately, offers drive circuit and respectively TCR and TSC is carried out to control operation.
Claims (6)
1. combined static reactive power compensator, it is characterized in that circuit two ends UNICOM's power supply and load respectively, in same circuit, be parallel with thyristor-controlled reactor, thyristor switchable capacitor, fixed capacitor group, wherein the single phase circuit of thyristor-controlled reactor adopts the structure of anti-parallel thyristor and series reactor, and the single phase circuit of thyristor switchable capacitor adopts the structure of anti-parallel thyristor and capacitor's series.
2. device according to claim 1, is characterized in that described thyristor-controlled reactor is three-phase, adopts delta connection mode; Described thyristor switchable capacitor is three-phase, adopts star-star connection mode.
3. device according to claim 1, is characterized in that described fixed capacitor group is 5,7,11 single tuned filters.
4. device according to claim 1, is characterized in that described thyristor switchable capacitor is two groups, and every group of thyristor switchable capacitor capacity is identical; Thyristor-controlled reactor capacity is the twice of thyristor switchable capacitor, and fixed capacitor pool-size is identical with thyristor switchable capacitor.
5. device according to claim 1, is characterized in that the capacitor of described thyristor series capacitor circuit is also connected with inductance.
6. device according to claim 1, is characterized in that being also connected with control system, and described control system comprises signal processing circuit, is connected on circuit; The controller being connected with signal processing circuit, controller connects thyristor-controlled reactor, thyristor switchable capacitor by drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320562041.0U CN203481832U (en) | 2013-09-10 | 2013-09-10 | Combination-type static reactive power compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320562041.0U CN203481832U (en) | 2013-09-10 | 2013-09-10 | Combination-type static reactive power compensation device |
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| Publication Number | Publication Date |
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| CN203481832U true CN203481832U (en) | 2014-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320562041.0U Expired - Fee Related CN203481832U (en) | 2013-09-10 | 2013-09-10 | Combination-type static reactive power compensation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112583028A (en) * | 2020-12-07 | 2021-03-30 | 西藏先锋绿能环保科技股份有限公司 | Reactive compensation and harmonic suppression method and device for electric drilling machine |
| CN114188119A (en) * | 2021-11-08 | 2022-03-15 | 南方电网科学研究院有限责任公司 | Inductance-adjustable reactor and inductance adjusting method thereof |
-
2013
- 2013-09-10 CN CN201320562041.0U patent/CN203481832U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112583028A (en) * | 2020-12-07 | 2021-03-30 | 西藏先锋绿能环保科技股份有限公司 | Reactive compensation and harmonic suppression method and device for electric drilling machine |
| CN114188119A (en) * | 2021-11-08 | 2022-03-15 | 南方电网科学研究院有限责任公司 | Inductance-adjustable reactor and inductance adjusting method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20150910 |
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| EXPY | Termination of patent right or utility model |