CN1317859A - Power factor correction circuit for three-phase power supply system - Google Patents
Power factor correction circuit for three-phase power supply system Download PDFInfo
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- CN1317859A CN1317859A CN00106026A CN00106026A CN1317859A CN 1317859 A CN1317859 A CN 1317859A CN 00106026 A CN00106026 A CN 00106026A CN 00106026 A CN00106026 A CN 00106026A CN 1317859 A CN1317859 A CN 1317859A
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- phase
- circuit
- power factor
- power supply
- factor correction
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Abstract
A power factor corrector for three-phase power supply system consisting of single-phase bridge rectifiers is composed of a three-phase reactor, and three capacitors parallelly connected with two inputs of signal-phase bridge rectifiers to form a central ine, which can make the 3n harmonic current to flow into single-phase full-bridge rectifier. The input current of three-phase power supply is filtered by the three-phase reactor, so raising up three-phase input power factor.
Description
The present invention relates to be used for the circuit of power factor correction of three-phase power supply system, particularly relating to a kind of is the circuit of power factor correction of the three-phase power supply system of input circuit composition with the single-phase full bridge rectifier.
The three-phase power supply system that prior art single-phase full bridge rectification input circuit is formed as depicted in figs. 1 and 2.Wherein, Fig. 1 is common single-phase full bridge rectification input circuit, the AC power of between A and center line N, importing, and four diode rectifications via bridge-type connects flow supply load R by inductance L and the level and smooth back of capacitor C filtering output DC
LBecause the unilateral conduction of rectifier diode causes producing phase lag and multiple harmonic component through the electric current of rectifier diode, and makes input power factor on the low side.
Fig. 2 is connected respectively between A, B and C three-phase and the center line N and the three-phase power supply system of formation with single-phase full bridge rectifier power source module shown in Figure 1 (illustrating with band frame diode).This three-phase power supply system of being made up of single-phase full bridge rectification input circuit power module generally exists power factor (≤90%) on the low side and harmonic content problem bigger than normal, and harmonic content also is difficult to reach IEC (International Electrotechnical Commission) standard.
Above-mentioned power factor is on the low side not to reach the problem of requirement with harmonic content in order to solve, and method commonly used has two classes.One class is to carry out Active Power Factor Correction, promptly adding with the power switch pipe in single-phase input rectification circuit is the APFC that feature is formed, by control circuit driving switch pipe action carrying out power factor correction, power factor is reached more than 99%, and harmonic content meets the IEC standard, but its shortcoming is the complexity that has increased circuit, causes cost to rise, and system reliability and stability are difficult for carrying out.
Another program is that adding is the passive power factor correcting circuit that feature is formed with inductance and electric capacity in single-phase input rectification circuit, as shown in Figure 1, though by inductance L and capacitor C filtering filtering suitable harmonic component, still have quite high harmonic component to be present in the electric current behind over commutation.Though the power factor in this scheme is improved more than 87%, harmonic content is difficult to reach the IEC1000-3-2 standard, and the dc voltage fluctuation of rectification output is bigger, causes DC load work to be affected.In addition, this type systematic can't use on the three-phase three-wire system electrical network, can only be used for three-phase four-wire system.
Therefore, needed is a kind of circuit of power factor correction that can improve power factor and can be used for three-phase three-wire power supply system.
The objective of the invention is to provides a kind of circuit that is used for power factor correction for the three-phase power supply system of being formed as the power module of input circuit with single-phase bridge rectifier, and make harmonic content meet the standard of IEC1000-3-2, this circuit of power factor correction both can be used for the three-phase three-wire system electrical network, can be used for the three-phase four-wire system electrical network again.
For achieving the above object, the invention provides a kind of circuit of power factor correction of three-phase power supply system, being included in one that each input of described three-phase power supply system connects on phase line is the single-phase load of input circuit with the single-phase bridge rectifier, and described three-phase power supply system is characterised in that:
The electric capacity that between two inputs of single-phase full bridge rectification circuit of described each input phase line, is connected in parallel respectively, thus described power supply center line formed.
Described circuit of power factor correction also is included in a series connection three-phase reactor is set on the three-phase input phase line.
Described circuit of power factor correction, the appearance value of wherein said each electric capacity is consistent.
Described circuit of power factor correction, the appearance value of wherein said middle line capacitance is 30 μ F.
Described circuit of power factor correction, wherein said three-phase power supply system are the three-phase power supply system of forming with single phase bridge type rectifier circu.
Described circuit of power factor correction, the induction reactance of wherein said series reactor are 5mH.
Described circuit of power factor correction also is included in the inductance of series connection on the center line that forms.
The invention has the advantages that: because circuit of power factor correction of the present invention is formed with single-phase full bridge rectification input circuit and center line electric capacity, therefore, circuit of power factor correction of the present invention can be used for multi-phase power supply system.Especially, can be used for three-phase power supply system according to circuit of power factor correction of the present invention.And then, if in three-phase power supply system, adopt three-phase reactor further to reduce current harmonic content on phase line, then line capacitance had both improved power factor and don't can influence the size of VD to form center line and to inject under the condition of 3n subharmonic current in adding.If use the center line inductance, also have and to adjust the advantage of injecting the triple harmonic current size.
Below, in conjunction with the accompanying drawings, the present invention is described in detail, will make objects and advantages of the present invention become clearer, wherein:
Fig. 1 is the single-phase bridge rectification input circuit of the circuit of power factor correction that is used for three-phase power supply system of prior art;
Fig. 2 existingly has by the schematic diagram of single-phase bridge rectification input circuit as three-phase power supply system;
Fig. 3 is single-phase input rectification circuit of the present invention and load schematic diagram.
Fig. 4 is the circuit of power factor correction that is used for three-phase three-wire power supply system of the present invention.
Below, with reference to the accompanying drawings, each preferred embodiment of the present invention is described.
The preferred embodiments of the present invention
At first, for ease of principle of the present invention is described, below be to be example with the three-phase power supply system.But circuit of power factor correction of the present invention can be used for the above multi-phase power supply system of two-phase.
For principle of the present invention is described, see also shown in Figure 4.Wherein, represent with the power module of single-phase bridge rectifier with the diode block diagram as input circuit.As seen from the figure, three single-phase bridge rectification input circuits are connected in series to respectively on three input phase line A, B and the C.And then, on three input phase line A, B and C, center line capacitor C is set respectively
a, C
b, and C
cThe other end of these three middle line capacitances is connected to another input of single-phase bridge rectification input circuit to form input center line N.
On the other hand, according to circuit of power factor correction of the present invention, the reactor of a series connection is set on three-phase input phase line, the series reactor of this moment is different with the meaning of the series reactor of prior art, it and three electric capacity actings in conjunction that link with center line have only the 3n subharmonic to be injected into rectifier and other harmonic waves are suppressed.Thereby can not make rectifier output DC drops.The series reactor T of this moment had both had the effect that suppresses the phase line harmonic current, improves current waveform, kept the direct voltage of rectification output can not reduce bigger than normal simultaneously again.Therefore, it had both improved power factor, had suppressed harmonic current, can not influence the voltage on the DC load simultaneously again.According to a further advantageous embodiment of the invention, series inductance L can also be set on center line N
nAt this moment, 3 * nth harmonic is just by center line N and center line inductance L
nBe injected in the single-phase rectifier input circuit.This series inductance L
nAlso has the adjustment current in middle wire, i.e. the advantage of 3 * nth harmonic size of current.
This shows, circuit of power factor correction of the present invention be on the single-phase bridge rectification input circuit of prior art in the parallel connection line capacitance to form center line and to inject on the basis of 3n subharmonic current, on the input phase line, further reduce current harmonic content with reactor again, and can improve power factor and don't influence the size of VD.In addition, if series inductance on center line more also has and can adjust the advantage of injecting the triple harmonic current size.
According to a preferred embodiment of the invention, each center line capacitor C
a, C
b, and C
cCapacitance equate, be 30 μ F.And series reactor L
nInductance value be 5mH.With nominal load as design capacity, and when 50% above load of input current, power factor is reached more than 90%, and can make the harmonic content of three-phase power supply system meet the standard of IEC1000-3-2.In addition, both can be used for the three-phase three-wire system electrical network, can be used for the three-phase four-wire system electrical network again according to circuit of power factor correction of the present invention.
Though below at length introduced according to the preferred embodiments of the invention, should be appreciated that can have various variations, replacement scheme, and alternative under the situation of the spirit and scope of the present invention that do not break away from claims defined.
Claims (7)
1. the circuit of power factor correction of a three-phase power supply system, being included in of connecting on each input phase line of described three-phase power supply system is the single-phase load of input circuit with the single-phase bridge rectifier, described three-phase power supply system is characterised in that:
The electric capacity that between two inputs of single-phase full bridge rectification circuit of described each input phase line, is connected in parallel respectively, thus described power supply center line formed.
2. circuit of power factor correction according to claim 1 also is included in a series connection three-phase reactor is set on the three-phase input phase line.
3. circuit of power factor correction according to claim 2, the appearance value of wherein said each electric capacity is consistent.
4. circuit of power factor correction according to claim 3, the appearance value of wherein said middle line capacitance is 30 μ F.
5. circuit of power factor correction according to claim 4, wherein said three-phase power supply system are the three-phase power supply system of forming with single phase bridge type rectifier circu.
6. circuit of power factor correction according to claim 5, the induction reactance of wherein said series reactor are 5mH.
7. circuit of power factor correction according to claim 6 also is included in the inductance of series connection on the center line that forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001060260A CN1164020C (en) | 2000-04-13 | 2000-04-13 | Power factor correction circuit for three-phase power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001060260A CN1164020C (en) | 2000-04-13 | 2000-04-13 | Power factor correction circuit for three-phase power supply system |
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| Publication Number | Publication Date |
|---|---|
| CN1317859A true CN1317859A (en) | 2001-10-17 |
| CN1164020C CN1164020C (en) | 2004-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001060260A Expired - Fee Related CN1164020C (en) | 2000-04-13 | 2000-04-13 | Power factor correction circuit for three-phase power supply system |
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| CN (1) | CN1164020C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003044933A1 (en) * | 2001-11-20 | 2003-05-30 | Yufu Wang | A parallel feed-forward compensating type power factor correction circuit for a three-phase power source |
| CN102263414A (en) * | 2010-05-25 | 2011-11-30 | 新能动力（北京）电气科技有限公司 | Electrical energy changer and system |
| CN103532135A (en) * | 2013-10-15 | 2014-01-22 | 国家电网公司 | Method and system for restraining resonance of civil power distribution system by power conditioning |
| CN108323185A (en) * | 2017-03-25 | 2018-07-24 | 深圳欣锐科技股份有限公司 | A kind of input voltage signal sample circuit in three-phase three-wire system pfc circuit |
-
2000
- 2000-04-13 CN CNB001060260A patent/CN1164020C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003044933A1 (en) * | 2001-11-20 | 2003-05-30 | Yufu Wang | A parallel feed-forward compensating type power factor correction circuit for a three-phase power source |
| US7068523B2 (en) | 2001-11-20 | 2006-06-27 | Yufu Wang | Parallel feed-forward compensating type power factor correction circuit for a three-phase power source |
| CN102263414A (en) * | 2010-05-25 | 2011-11-30 | 新能动力（北京）电气科技有限公司 | Electrical energy changer and system |
| WO2011147128A1 (en) * | 2010-05-25 | 2011-12-01 | 新能动力（北京）电气科技有限公司 | Converting device of electrical energy |
| JP2013526827A (en) * | 2010-05-25 | 2013-06-24 | ニュー エナジー パワー カンパニー | Electrical energy conversion equipment |
| AU2010353929B2 (en) * | 2010-05-25 | 2014-06-12 | Novtium (Beijing) Smart Energy Technology Co., Ltd | Converting device of electrical energy |
| CN103532135A (en) * | 2013-10-15 | 2014-01-22 | 国家电网公司 | Method and system for restraining resonance of civil power distribution system by power conditioning |
| CN108323185A (en) * | 2017-03-25 | 2018-07-24 | 深圳欣锐科技股份有限公司 | A kind of input voltage signal sample circuit in three-phase three-wire system pfc circuit |
| CN108323185B (en) * | 2017-03-25 | 2020-09-15 | 深圳欣锐科技股份有限公司 | Input voltage signal sampling circuit in three-phase three-wire system PFC circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1164020C (en) | 2004-08-25 |
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Granted publication date: 20040825 Termination date: 20110413 |