CN203522200U - Current detection structure for reactive power adjusting device - Google Patents
Current detection structure for reactive power adjusting device Download PDFInfo
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- CN203522200U CN203522200U CN201320645602.3U CN201320645602U CN203522200U CN 203522200 U CN203522200 U CN 203522200U CN 201320645602 U CN201320645602 U CN 201320645602U CN 203522200 U CN203522200 U CN 203522200U
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- cosine
- sine
- phase
- reactive power
- locked loop
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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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Abstract
The utility model discloses a current detection structure for a reactive power adjusting device. A phase-locked loop input end is connected with an A-phase power voltage, and a phase-locked loop output end is connected with the input end of a sine and cosine generation circuit. The sine and cosine two-channel outputs of the sine and cosine generation circuit are respectively connected to the input end of a matrix converter, and the output ends of the matrix converter are respectively connected to the input end of a two-way low pass filter in a manner of one-to-one correspondence. According to the utility model, a compensating current reference cannot be affected by the voltage waveform distortion.
Description
Technical field
The utility model relates to reactive power adjusting device field, is specially a kind of reactive power adjusting device electric current detecting structure.
Background technology
reactive power adjusting device (SVG) is a kind of inactive reacance generator, its main circuit is exactly a bridge-type current transformer that adopts modularized design, what its switching device adopted is full-control type power semiconductor switches device, as IGBT etc., by the suitable control to these switching devices, can make AC side of converter produce phase place and adjustable output voltage or the electric current of amplitude, reach the object of compensating reactive power and harmonic wave.In prior art, the current detecting of SVG is partly vulnerable to voltage distortion impact, affects reactive power adjustment device work stability.
Utility model content
The purpose of this utility model is to provide a kind of reactive power adjusting device electric current detecting structure, the problem existing to solve prior art.
In order to achieve the above object, the technical scheme that the utility model adopts is:
A kind of reactive power adjusting device electric current detecting structure, it is characterized in that: include phase-locked loop, sine and cosine circuit for generating, matrix converter, two-way low pass filter, described phase-locked loop input access A phase line voltage, phase-locked loop output is connected with sine and cosine circuit for generating input, sine and cosine circuit for generating just has, cosine doubleway output, and just, cosine doubleway output access matrix converter input respectively, matrix converter output is corresponding access two-way low pass filter input one by one respectively.
The utility model is not affected by voltage distortion, when there is distortion in line voltage, employing matrix converter is just being got, cosine signal participates in calculating, and the harmonic components of distortion voltage does not occur in calculating process, thereby offset current is with reference to the impact that is not subject to voltage waveform distortion.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Embodiment
As shown in Figure 1.A reactive power adjusting device electric current detecting structure, includes phase-locked loop pll, sine and cosine circuit for generating sin-cos, matrix converter C, two-way low pass filter LPF, phase-locked loop pll input access A phase line voltage
e a phase-locked loop pll output is connected with sine and cosine circuit for generating sin-cos input, sine and cosine circuit for generating sin-cos just has, cosine doubleway output, and just, cosine doubleway output access matrix converter C input respectively, matrix converter C output is corresponding access two-way low pass filter LPF input one by one respectively.
Claims (1)
1. a reactive power adjusting device electric current detecting structure, it is characterized in that: include phase-locked loop, sine and cosine circuit for generating, matrix converter, two-way low pass filter, described phase-locked loop input access A phase line voltage, phase-locked loop output is connected with sine and cosine circuit for generating input, sine and cosine circuit for generating just has, cosine doubleway output, and just, cosine doubleway output access matrix converter input respectively, matrix converter output is corresponding access two-way low pass filter input one by one respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320645602.3U CN203522200U (en) | 2013-10-18 | 2013-10-18 | Current detection structure for reactive power adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320645602.3U CN203522200U (en) | 2013-10-18 | 2013-10-18 | Current detection structure for reactive power adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203522200U true CN203522200U (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320645602.3U Expired - Fee Related CN203522200U (en) | 2013-10-18 | 2013-10-18 | Current detection structure for reactive power adjusting device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203522200U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106569004A (en) * | 2016-10-20 | 2017-04-19 | 西安奥特迅电力电子技术有限公司 | Dynamic current detection method based on time-domain transformation |
-
2013
- 2013-10-18 CN CN201320645602.3U patent/CN203522200U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106569004A (en) * | 2016-10-20 | 2017-04-19 | 西安奥特迅电力电子技术有限公司 | Dynamic current detection method based on time-domain transformation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20201018 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |