CN203261035U - SVG dynamic reactive power compensator capable of normally working when system single-phase grounding happens - Google Patents
SVG dynamic reactive power compensator capable of normally working when system single-phase grounding happens Download PDFInfo
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- CN203261035U CN203261035U CN2013202450761U CN201320245076U CN203261035U CN 203261035 U CN203261035 U CN 203261035U CN 2013202450761 U CN2013202450761 U CN 2013202450761U CN 201320245076 U CN201320245076 U CN 201320245076U CN 203261035 U CN203261035 U CN 203261035U
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
Abstract
The utility model relates to a SVG dynamic reactive power compensator capable of normally working when system single-phase grounding happens; the compensator comprises a main switch cabinet, an inlet wire cabinet, a starting cabinet, a power cabinet and a control system; the main switch cabinet, the inlet wire cabinet, the starting cabinet and the power cabinet form SVG integrated equipment connected on a power grid bus; an input end of the control system is respectively connected with a current transformer I of a power grid main inlet wire and a current transformer II in the power cabinet; an output end of the control system is respectively connected with a control end of the inlet wire cabinet and a control end of the power cabinet; voltage transformers are arranged on a lower side of an isolation switch in the inlet wire cabinet; the three-phase three voltage transformers employ a connecting mode of star connection neutral ungrounding method; and signal ends of the three-phase voltage transformers are respectively connected with the input end of the control system. When the single-phase grounding fault happens in the power grid system, the SVG dynamic reactive power compensator can stably, fast and accurately carry out reactive power compensation for the power grid system, thereby providing guarantee for the stability and reliability of safe operation of the power grid.
Description
Technical field
The utility model relates to power distribution network grounding technology field, particularly a kind of SVG device for still carrying out to electrical network reactive power compensation when the electrical network ground connection.
Background technology
Need in the network system running electrical network is carried out reactive power compensation, the power factor during with the raising operation of power networks reduces grid loss.Reactive-load compensation equipment commonly used is dynamic reactive compensation device in recent years, is called for short the SVG device, and the SVG device is carrying out electrical network in the process of reactive power compensation, need to measure accurately the electrical network phase voltage and participate in computing.Present SVG device comprises control system and is connected to the main switch cabinet of electrical network bus, incoming line cabinet, startup cabinet and power cabinet in turn, control system is carried out respectively the collection of the required voltage signal of computing and current signal by the threephase potential transformer summation current transformer that is arranged on electrical network master inlet wire, control system calculate according to the signal that gathers and the power ratio control cabinet in the reactive power of IGBT action required compensation of output in the electrical network.
The control system of SVG device requires the three-phase voltage should be in error range in the process of computing, but electrical network in actual moving process single phase ground fault occurs probably; When single phase ground fault occured, system still needed to carry out the compensation of reactive power.Therefore the unbalance voltage when yet the threephase potential transformer in the network system is mainly used in gathering network system ground connection must adopt star to connect neutral grounding mode and be connected to network system; And during network system generation single-phase earthing, the three-phase voltage signal situation of threephase potential transformer collection is: the lower voltage of Earth Phase, and other two phase voltages raise; Therefore the phase voltage in the time of can not truly reflecting the network system single-phase earthing.This moment, the SVG device can only be out of service, can not carry out to electrical network the compensation of reactive power.
The utility model content
The utility model technical issues that need to address provide a kind of SVG device that still can carry out to network system reactive power compensation when network system generation single phase ground fault, to guarantee the normal operation of network system.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is as follows:
The SVG dynamic reactive compensation device of normal operation when system's single-phase earthing, comprise main switch cabinet, incoming line cabinet, startup cabinet, power cabinet and control system, wherein main switch cabinet, incoming line cabinet, startup cabinet and power cabinet composition SVG the complete sets of equipment are connected on the electrical network bus, the input of control system is connected with the current transformer II that the current transformer I of electrical network master inlet wire is connected with power cabinet respectively, and the output of control system is connected control end with the control end of incoming line cabinet respectively and is connected with power cabinet; The end opening side of isolating switch is provided with voltage transformer in the described incoming line cabinet, and three voltage transformers of three-phase adopt star to connect the isolated neutral connected mode, and the signal end of threephase potential transformer is connected with the input of control system respectively.
Because the technological progress of having adopted technique scheme, the utility model to obtain is:
SVG device described in the utility model has increased independently threephase potential transformer, the three-phase electricity instrument transformer adopts star to connect the isolated neutral mode, can carry out Real-time Collection to the three-phase voltage in the electrical network exactly, the voltage of threephase potential transformer collection carries out the compensation of reactive power compensation calculating and reactive power as the reference voltage signal that control system participates in computing, thereby guaranteed that whole SVG device is when network system generation single phase ground fault, still can stablize, fast, accurately network system is carried out the compensation of reactive power, for stability and the reliability of electric power netting safe running provides guarantee.
Description of drawings
Fig. 1 is system wiring figure of the present utility model.
Wherein: 1. main switch cabinet, 2. incoming line cabinet 3. starts cabinet, 4. power cabinet, 5. control system, 6. current transformer I, 7. isolating switch, 8. voltage transformer, 9. contactor, 10. current transformer II.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further details.
The SVG dynamic reactive compensation device of normal operation when system's single-phase earthing, its winding diagram as shown in Figure 1, comprise main switch cabinet 1, incoming line cabinet 2, start cabinet 3, power cabinet 4 and control system 5, wherein main switch cabinet 1, incoming line cabinet 2, startup cabinet 3 and power cabinet 4 composition SVG the complete sets of equipment are connected on the electrical network bus, the end opening side of isolating switch 7 is provided with voltage transformer 8 in the incoming line cabinet 2, three voltage transformers of three-phase adopt star to connect the isolated neutral connected mode, are used for gathering network system three-phase voltage value.
The input of control system 5 is connected with threephase potential transformer, the current transformer I summation current transformer II that is arranged on electrical network master inlet wire respectively, and the output of control system 5 is connected with the control end that the control end of incoming line cabinet 2 is connected with power cabinet respectively.Control system is used in start-up course the contactor 9 in the incoming line cabinet being controlled, and calculate according to the compensation that the magnitude of voltage that gathers and current value carry out the network system reactive power, according to result of calculation and reference voltage signal the IGBT in the power cabinet is controlled, thereby realization is to the compensation of power system reactive power.
Claims (1)
1. the SVG dynamic reactive compensation device that when system's single-phase earthing, normally moves, comprise main switch cabinet (1), incoming line cabinet (2), start cabinet (3), power cabinet (4) and control system (5), main switch cabinet (1) wherein, incoming line cabinet (2), starting cabinet (3) and power cabinet (4) composition SVG the complete sets of equipment is connected on the electrical network bus, the input of control system (5) is connected 4 with the current transformer I (6) of electrical network master inlet wire with power cabinet respectively) in current transformer II (10) be connected, the output of control system (5) is connected 4 with the control end of incoming line cabinet (2) with power cabinet respectively) control end be connected; It is characterized in that: the end opening side of isolating switch (7) is provided with voltage transformer (8) in the described incoming line cabinet (2), three voltage transformers of three-phase adopt star to connect the isolated neutral connected mode, and the signal end of threephase potential transformer is connected with the input of control system (5) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202450761U CN203261035U (en) | 2013-05-08 | 2013-05-08 | SVG dynamic reactive power compensator capable of normally working when system single-phase grounding happens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202450761U CN203261035U (en) | 2013-05-08 | 2013-05-08 | SVG dynamic reactive power compensator capable of normally working when system single-phase grounding happens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203261035U true CN203261035U (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013202450761U Expired - Lifetime CN203261035U (en) | 2013-05-08 | 2013-05-08 | SVG dynamic reactive power compensator capable of normally working when system single-phase grounding happens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509690A (en) * | 2020-05-11 | 2020-08-07 | 云南电网有限责任公司电力科学研究院 | Ground fault full-compensation system and method for multiplexing reactive compensation |
-
2013
- 2013-05-08 CN CN2013202450761U patent/CN203261035U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509690A (en) * | 2020-05-11 | 2020-08-07 | 云南电网有限责任公司电力科学研究院 | Ground fault full-compensation system and method for multiplexing reactive compensation |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |
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| CX01 | Expiry of patent term |