CN101252283B - Medium voltage system inductive dynamic reactive-load adjusting device - Google Patents
Medium voltage system inductive dynamic reactive-load adjusting device Download PDFInfo
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- CN101252283B CN101252283B CN2008101038890A CN200810103889A CN101252283B CN 101252283 B CN101252283 B CN 101252283B CN 2008101038890 A CN2008101038890 A CN 2008101038890A CN 200810103889 A CN200810103889 A CN 200810103889A CN 101252283 B CN101252283 B CN 101252283B
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- brachium pontis
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- bridge
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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
Disclosed is an inductive dynamic reactive power adjusting device for a medium voltage network, belonging to dynamic reactive power compensation technical field. The adjusting device comprises three single-phase H-bridge inverters(3) which share a DC capacitor Cd, a high-pass filter(2)for the outputs of the inverters, three single-phase transformers(3), a fixed electric reactor(4) and a switch(5). The output voltages of the three single-phase H-bridge inverters(3) are controlled to change between 0-UN( UN corresponds to the voltage rating of the system) to realize the adjustment of the inductive reactive power between zero and the maximum. The adjusting device has the advantages that the inductive reactive power is continuously adjustable, quick in response and is highly reliable; the harmonics introduced into the system suit national standard requirements; energy consumption of the inverters is less than one forth of the capacity of the adjusting device, thereby improving the workingconditions of electric power devices, reducing cost and improving reliability.
Description
Technical field
The invention belongs to dynamic reactive power compensation technique field, a kind of medium voltage network perception dynamic reactive-load adjusting device particularly is provided.
Background technology
Reactive balance is to the economic benefit that improves electrical network and to improve power supply quality most important, in 10～35kV intermediate distribution system, has generally adopted fixed capacitor to carry out reactive power compensation.But change frequent by daily load, require a large amount of adjustable reactive powers of response fast to compensate the load needs, keep system's reactive balance, the system of assurance operates under the High Power Factor state, reduce loss, the operational efficiency of raising system, it is a kind of choose reasonable as medium voltage network dynamic passive compensation mode that therefore perceptual dynamic reactive-load adjusting device cooperates the existing fixed capacitor.
The invention provides a kind of medium voltage network perception dynamic reactive-load adjusting device main circuit topology, it constitutes one group of perception wattless component by three single-phase reactors, each reactor one is terminated at system busbar, the other end links to each other with the output of three single-phase inverters and constitutes, by regulating the output voltage of inverter, the voltage drop that changes the reactor two ends realizes regulating continuously the purpose of the perceptual reactive current of the system that is input to, not only have the adjustable continuously of lagging reactive power, advantages such as response speed is fast, also overcome the big shortcoming of thyristor-controlled reactor injected system harmonic wave, need not to increase extra filter; Inverter is in the entire capacity adjustable range of reactive-load adjusting device on the other hand, and its dissipation power is no more than 1/4th of device rated capacity, has therefore reduced installation cost, has improved reliability and economy.
Summary of the invention
The object of the present invention is to provide a kind of medium voltage network perception dynamic reactive-load adjusting device, be used for the perceptual dynamic passive compensation of 10～35kV distribution system.But it is based on the inverter output voltage adjusting continuously fast of conditioning technology realization lagging reactive power continuously.
A kind of medium voltage network perception dynamic reactive-load adjusting device that the present invention proposes comprises: common DC electric capacity C
dThree single-phase H bridge inverters 1, inverter output high pass filter 2, three single-phase access transformers 3, constant reactance device 4, circuit breaker 5.
Common DC electric capacity C
dThree single-phase H bridge (S forming by 12 IGBT devices and inverse parallel diode thereof of three single-phase H bridge inverters 1
A1-2, S
B1-2, S
C1-2), dc capacitor C
dConstitute.Each single-phase H bridge is made of two brachium pontis, and three single-phase H bridges are totally six brachium pontis.Each brachium pontis is in series by up and down two IGBT and inverse parallel diode thereof, and the tie point of two IGBT is the brachium pontis output.End points is connected respectively to together about six brachium pontis, forms the dc bus of three-phase four-arm current transformer, and the upper end bus is a positive electrode bus, and the lower end bus is the negative pole bus.Dc capacitor C
dBe connected between positive electrode bus and the negative pole bus according to electric capacity polarity.
The output of each brachium pontis is connected to inverter output high pass filter 2, and promptly the output of each brachium pontis is connected to six corresponding filter inductance (L
A1-2, L
B1-2, L
C1-2) end, the other end of six filter inductances is connected respectively to three single-phase access transformer 3 (T
A, T
B, T
C) primary side, be parallel with corresponding filter capacitor (C on two inputs of the primary side of each single-phase access transformer
FA, C
FB, C
FC).
The secondary side of three single-phase access transformers 3 has two lead-out terminals.A terminal connects together the formation neutral point, and another terminal is connected respectively to corresponding constant reactance device 4 (FL
A, FL
B, FL
C) three input terminals on.
Three lead-out terminals of constant reactance device 4 insert A, B, C three-phase medium voltage network by circuit breaker 5 respectively.
The operation principle of the medium voltage network perception dynamic reactive-load adjusting device that the present invention proposes is, by realizing capacity transfer control based on the control circuit of DSP (digital signal processor), employing SPWM (Sine Wave Pulse Width Modulation) control strategy.Control circuit sampling system voltage, phase-locked processing back is as synchronizing signal and modulated sinusoid signal, the high frequency triangle wave signal that modulated sinusoid signal and DSP produce compares, and produces the corresponding control end enforcement control that the SPWM pulse outputs to three single-phase H bridge inverters.Size by control modulated sinusoid signal amplitude makes three single-phase H bridge inverter output voltages at 0～U
N(U
NCorresponding with the system rated voltage) between change, realize regulating in lagging reactive power 0～maximum magnitude.
The invention has the advantages that: perception is idle adjustable continuously, and response speed is fast, reliability is high, need not under the extra filter condition, and the harmonic wave of injected system satisfies national Specification; The inverter dissipation power is no more than 1/4th of adjusting device entire capacity, has improved the condition of work of power electronic device, has reduced cost, has improved reliability.
Description of drawings
Fig. 1 is a kind of medium voltage network perception dynamic reactive-load adjusting device main circuit topology figure of the present invention.Wherein, common DC electric capacity C
dThree single-phase H bridge inverters 1, inverter output high pass filter 2, three single-phase access transformers 3, constant reactance device 4, circuit breaker 5.
Embodiment
A kind of medium voltage network perception dynamic reactive-load adjusting device main circuit topology that the present invention proposes as shown in Figure 1, by common DC electric capacity C
dThree single-phase H bridge inverters 1, inverter output high pass filter 2, three single-phase access transformers 3, constant reactance device 4, circuit breakers 5 form.
Common DC electric capacity C
dThree single-phase H bridge (S forming by 12 IGBT devices and inverse parallel diode thereof of three single-phase H bridge inverters 1
A1-2, S
B1--2, S
C1-2), dc capacitor C
dConstitute.Each single-phase H bridge is made of two brachium pontis, and three single-phase H bridges are totally six brachium pontis.Each brachium pontis is in series by up and down two IGBT and inverse parallel diode thereof, and the tie point of two IGBT is the brachium pontis output.End points is connected respectively to together about six brachium pontis, forms the dc bus of three-phase four-arm current transformer, and the upper end bus is a positive electrode bus, and the lower end bus is the negative pole bus.Dc capacitor C
dBe connected between positive electrode bus and the negative pole bus according to electric capacity polarity.
The output of each brachium pontis is connected to inverter output high pass filter 2, and promptly the output of each brachium pontis is connected to six corresponding filter inductance (L
A1-2, L
B1-2, L
C1-2) end, the other end of six filter inductances is connected respectively to three single-phase access transformer 3 (T
A, T
B, T
C) primary side, be parallel with corresponding filter capacitor (C on two inputs of the primary side of each single-phase access transformer
FA, C
FB, C
FC).
The secondary side of three single-phase access transformers 3 has two lead-out terminals.A terminal connects together the formation neutral point, and another terminal is connected respectively to corresponding constant reactance device 4 (FL
A, FL
B, FL
C) three input terminals on.
Three lead-out terminals of constant reactance device 4 insert A, B, C three-phase medium voltage network by circuit breaker 5 respectively.
Claims (1)
1. a medium voltage network perception dynamic reactive-load adjusting device is characterized in that this device comprises: common DC electric capacity (C
d) three single-phase H bridge inverters (1), inverter output high pass filter (2), three single-phase access transformers (3), constant reactance device (4), circuit breaker (5);
Common DC electric capacity (C
d) three single-phase H bridge (S forming by 12 IGBT devices and inverse parallel diode thereof of three single-phase H bridge inverters (1)
A1-2, S
B1-2, S
C1-2), dc capacitor (C
d) constitute; Each single-phase H bridge is made of two brachium pontis, and three single-phase H bridges are totally six brachium pontis; Each brachium pontis is in series by up and down two IGBT and inverse parallel diode thereof, and the tie point of two IGBT is the brachium pontis output; The upper extreme point of six brachium pontis connects together the positive electrode bus that forms three-phase six brachium pontis current transformers, and the lower extreme point of six brachium pontis connects together the negative pole bus that forms three-phase six brachium pontis current transformers; Dc capacitor (C
d) be connected between positive electrode bus and the negative pole bus according to electric capacity polarity;
The output of each brachium pontis is connected to inverter output high pass filter (2), and the output of each brachium pontis is connected respectively to six filter inductance (L
A1-2, L
B1-2, L
C1-2) in an end of corresponding one, the other end of six filter inductances be connected respectively to three single-phase access transformers (3, T
A, T
B, T
C) primary side, be parallel with corresponding filter capacitor (C on two inputs of the primary side of each single-phase access transformer
FA, C
FB, C
FC);
The secondary side of three single-phase access transformers (3) has two lead-out terminals; A terminal connects together the formation neutral point, another terminal be connected respectively to corresponding constant reactance device (4, FL
A, FL
B, FL
C) three input terminals on;
Three lead-out terminals of constant reactance device (4) insert (A, B, C) three-phase medium voltage network by circuit breaker (5) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101038890A CN101252283B (en) | 2008-04-11 | 2008-04-11 | Medium voltage system inductive dynamic reactive-load adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101038890A CN101252283B (en) | 2008-04-11 | 2008-04-11 | Medium voltage system inductive dynamic reactive-load adjusting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101252283A CN101252283A (en) | 2008-08-27 |
| CN101252283B true CN101252283B (en) | 2010-12-15 |
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ID=39955515
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101038890A Active CN101252283B (en) | 2008-04-11 | 2008-04-11 | Medium voltage system inductive dynamic reactive-load adjusting device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2753998C (en) * | 2009-03-09 | 2016-05-03 | Abb Technology Ag | Control device, reactive power compensator and method |
| CN105099215A (en) * | 2014-05-21 | 2015-11-25 | 济南芯驰能源科技有限公司 | Aircraft ground miniaturization power supply suitable for multiple power supply modes |
| US10200030B2 (en) * | 2015-03-13 | 2019-02-05 | Transphorm Inc. | Paralleling of switching devices for high power circuits |
| CN104716858B (en) * | 2015-03-13 | 2017-11-14 | 湖州师范学院 | The full-bridge grid-connected inverter circuit of no current ripple |
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2008
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| CN101252283A (en) | 2008-08-27 |
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Owner name: NORTH CHINA POWER SCIENCE RESEARCH INST., CO., LTD Effective date: 20131204 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yin Zhongdong Inventor after: Cha Xiaoming Inventor after: Sun Jianjun Inventor after: Liu Hui Inventor after: Wu Linlin Inventor before: Yin Zhongdong Inventor before: Cha Xiaoming Inventor before: Sun Jianjun |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: YIN ZHONGDONG CHA XIAOMING SUN JIANJUN TO: YIN ZHONGDONG CHA XIAOMING SUN JIANJUN LIU HUI WU LINLIN |
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| TR01 | Transfer of patent right |
Effective date of registration: 20131204 Address after: 102206 Beijing city Changping District Zhu Daxinzhuang North Agricultural Road No. 2 Patentee after: North China Electric Power University Patentee after: North China Electrical Power Research Institute LLC Address before: 102206 Beijing, Changping District, Zhu Xin, North China Electric Power University Patentee before: North China Electric Power University |