CN203522202U - Phase-locked controller for reactive power adjusting device - Google Patents
Phase-locked controller for reactive power adjusting device Download PDFInfo
- Publication number
- CN203522202U CN203522202U CN201320645721.9U CN201320645721U CN203522202U CN 203522202 U CN203522202 U CN 203522202U CN 201320645721 U CN201320645721 U CN 201320645721U CN 203522202 U CN203522202 U CN 203522202U
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- Prior art keywords
- frequency mixer
- output
- input
- phase
- adjusting device
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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
-
- 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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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model discloses a phase-locked controller for a reactive power adjusting device, and the controller comprises a first frequency mixer and a second frequency mixer. The output end of the first frequency mixer is connected with a PI regulator, and the output end of the PI regulator is connected with the second frequency mixer. The output end of the second frequency mixer is connected with an integrator, and the output end of the integrator is connected with a low pass filter. The output end of the low pass filter is connected with the input end of the first frequency mixer. The controller provided by the utility model can effectively eliminate the impact from the harmonic voltage on a loop in a power grid, thereby enabling the controller to be good in attenuation and inhibition of voltage harmonic and to be good in capacity of resisting disturbance and stability.
Description
Technical field
The utility model relates to phase-locked controller field, is specially the phase-locked controller of a kind of reactive power adjusting device.
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.When prior art reactive power adjusting device is used, the mode of the phase-locked employing voltage over zero of voltage, its phase-locked precision depends on the detection constantly of voltage signal zero crossing, when system voltage distorts when serious, voltage signal zero point and first-harmonic are inconsistent zero point, even likely at first-harmonic, near zero point, there are a plurality of signal zero crossing voltage harmonic signals, had a strong impact on the synchronous and precision of phase place.
Utility model content
The purpose of this utility model is to provide the phase-locked controller of a kind of reactive power adjusting device, the problem existing to solve prior art.
In order to achieve the above object, the technical scheme that the utility model adopts is:
The phase-locked controller of a kind of reactive power adjusting device, it is characterized in that: include first, the second frequency mixer, an input input fundamental voltage q axle component of the first frequency mixer, the output of the first frequency mixer is connected with the input of a pi regulator, the output of pi regulator is connected with an input of the second frequency mixer, another input of the second frequency mixer accesses initial power frequency angular velocity signal, the output of the second frequency mixer is connected with an integrator, the output output pll phase value of described integrator, the output of integrator is also connected with a low pass filter input, the output of low pass filter is connected with another input of the first frequency mixer.
The utility model can effectively be eliminated harmonic voltage in electrical network to loop affects, make phase-locked controller there is good decay and inhibition to voltage harmonic, can be accurately phase-locked in distortion or unbalanced situation thereby exist at line voltage, and there is good antijamming capability and stability.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Embodiment
As shown in Figure 1.The phase-locked controller of a kind of reactive power adjusting device, include first, second frequency mixer A1, A2, an input input fundamental voltage q axle component Uq of the first frequency mixer A1, the output of the first frequency mixer A1 is connected with the input of a pi regulator PI, the output of pi regulator PI is connected with an input of the second frequency mixer A2, and another input of the second frequency mixer A2 accesses initial power frequency angular velocity signal w
0, the output of the second frequency mixer A2 is connected with an integrator 1/s, the output of integrator 1/s output pll phase value, the output of integrator 1/s also with a low pass filter Ca
bc/c
dqinput connects, low pass filter Ca
bc/c
dqoutput be connected with another input of the first frequency mixer A1.
Claims (1)
1. the phase-locked controller of reactive power adjusting device, it is characterized in that: include first, the second frequency mixer, an input input fundamental voltage q axle component of the first frequency mixer, the output of the first frequency mixer is connected with the input of a pi regulator, the output of pi regulator is connected with an input of the second frequency mixer, another input of the second frequency mixer accesses initial power frequency angular velocity signal, the output of the second frequency mixer is connected with an integrator, the output output pll phase value of described integrator, the output of integrator is also connected with a low pass filter input, the output of low pass filter is connected with another input of the first frequency mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320645721.9U CN203522202U (en) | 2013-10-18 | 2013-10-18 | Phase-locked controller for reactive power adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320645721.9U CN203522202U (en) | 2013-10-18 | 2013-10-18 | Phase-locked controller for reactive power adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203522202U true CN203522202U (en) | 2014-04-02 |
Family
ID=50381077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320645721.9U Expired - Fee Related CN203522202U (en) | 2013-10-18 | 2013-10-18 | Phase-locked controller for reactive power adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203522202U (en) |
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2013
- 2013-10-18 CN CN201320645721.9U patent/CN203522202U/en not_active Expired - Fee Related
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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 |