CN100541225C - Harmonic current and inductive reactive power generating device - Google Patents
Harmonic current and inductive reactive power generating device Download PDFInfo
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- CN100541225C CN100541225C CNB2006101555031A CN200610155503A CN100541225C CN 100541225 C CN100541225 C CN 100541225C CN B2006101555031 A CNB2006101555031 A CN B2006101555031A CN 200610155503 A CN200610155503 A CN 200610155503A CN 100541225 C CN100541225 C CN 100541225C
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- current
- reactive power
- phase
- inductive reactive
- harmonic current
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- 230000001939 inductive effect Effects 0.000 title claims abstract description 19
- 230000010363 phase shift Effects 0.000 claims abstract description 19
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 239000010703 silicon Substances 0.000 claims abstract description 5
- 238000005070 sampling Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 238000010248 power generation Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- 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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Abstract
The invention discloses a harmonic current and inductive reactive power generating device, and belongs to the technical field of power electronic devices. The direct current side of a rectifier formed by a three-phase bridge type full-control rectifier bridge is connected in series with a direct current reactor and a current sampler, two ends of the current sampler are connected with the current feedback input end of a phase shift controller, the signal output end of the phase shift controller is correspondingly connected with a silicon controlled gate pole of the three-phase bridge type full-control rectifier bridge, the voltage input end of the three-phase bridge type full-control rectifier bridge is directly connected into a power grid, and the voltage input end of the phase shift controller is connected into the power grid after passing through a step-. The harmonic current and inductive reactive power generation device is simple and reasonable in structure, can generate harmonic current and inductive reactive power, can flexibly adjust the harmonic current and the inductive reactive power, has the advantages of high output capacity, high output frequency, small power loss and the like, and effectively realizes monitoring of electric energy quality and detection of treatment products.
Description
Technical field
The invention belongs to the power electronic equipment technical field, be specifically related to a kind of harmonic current and inductive reactive power generator.
Background technology
In recent years, along with development of modern industry, various industrial loads, particularly various equipment based on Power Electronic Technique such as ac arc furnace, large-scale lifter are widely applied, because its non-linear and unbalance response, the voltage waveform of power distribution network is distorted, the quality of power supply of electrical network, the safe operation of consumer are constituted serious threat.
Just because of above-mentioned reason, nowadays various electric energy quality monitorings and improvement product such as Fluke434, passive L-C wave filter, active filter etc. have appearred on market, but owing to lack effective detection means, relevant departments can't be rigid in checking up to the quality of these energy monitors and improvement product, thereby cause product quality very different.
Realize that what at first need is signal source, provides required corresponding harmonic signal to product to be checked to the detection of electric energy quality monitoring and improvement product.In addition, present L-C type filter not only has filter function, also has the inductive reactive power compensation function, and the lagging reactive power of system load is constantly to change, this just requires signal source can produce harmonic current, can produce lagging reactive power again, and the harmonic current, the lagging reactive power that produce can be regulated.
Harmonic source commonly used has two kinds of schemes in the test at present, and scheme one is to utilize Power Electronic Technique, simulates needed waveform by inversion.This scheme can simulate any required waveform, has high precision, advantages such as high flexibility, but because the restriction of power electronic devices performances such as IGBT, this scheme has inherent shortcomings such as output capacity is little, frequency is low; Scheme two is to adopt typical harmonic source load, as intermediate frequency furnace etc.This scheme need consume a large amount of meritorious, and the size of harmonic current, reactive power all can't effectively be regulated.
Summary of the invention
The present invention aims to provide harmonic current and the inductive reactive power generator that a kind of harmonic current and lagging reactive power can be regulated, and to overcome problems of the prior art, realizes effectively the electric energy quality monitoring and the detection of administering product.
Described harmonic current and inductive reactive power generator, the DC side serial connection that it is characterized in that the rectifier that is made of three-phase bridge full-controlled rectifier bridge is provided with direct current reactor, current sampler, the two ends of current sampler are connected with the current feedback input end of phase-shift controller, the corresponding connection of controllable silicon gate pole of phase-shift controller signal output part and three-phase bridge full-controlled rectifier bridge, the voltage input end of three-phase bridge full-controlled rectifier bridge directly inserts electrical network, and the phase-shift controller voltage input end inserts electrical network after by step-down transformer.
Described harmonic current and inductive reactive power generator is characterized in that described direct current reactor is a dc flat-wave reactor.
Described harmonic current and inductive reactive power generator is characterized in that described phase-shift controller is for controlling the controller that trigger board is the main body formation for discharging and recharging with FSC6M-1.。
Described harmonic current and inductive reactive power generator is characterized in that described current sampler adopts sampling resistor or Hall element.
Above-mentioned harmonic current and inductive reactive power generator, simple and reasonable, can produce harmonic current and lagging reactive power, and can realize harmonic current, lagging reactive power flexible, have advantages such as output capacity height, output frequency height, power attenuation are little, realized effectively the electric energy quality monitoring and the detection of administering product.
Description of drawings
Fig. 1 is an electrical block diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with Figure of description.
Be illustrated in figure 1 as harmonic current and inductive reactive power generator, three-phase bridge full-controlled rectifier bridge is by being made up of six controllable silicons, the DC side serial connection of the rectifier 4 that is made of three-phase bridge full-controlled rectifier bridge is provided with dc flat-wave reactor 3, current sampler 2, current sampler 2 adopts sampling resistor or Hall element, the two ends of current sampler 2 are connected with the current feedback input end of phase-shift controller 1, the corresponding connection of controllable silicon gate pole of phase-shift controller 1 signal output part and three-phase bridge full-controlled rectifier bridge, the voltage input end of three-phase bridge full-controlled rectifier bridge directly inserts electrical network, phase-shift controller 1 voltage input end inserts electrical network by step-down transformer 5 backs, and phase-shift controller 1 can adopt and discharge and recharge the control trigger board with FSC6M-1 is the controller that main body constitutes.Phase-shift controller 1 is by the DC current I on the controllable silicon trigger angle adjusting dc flat-wave reactor 3 of control three-phase bridge full-controlled rectifier bridge
dSize, thereby regulate harmonic current value and lagging reactive power.
Compare with the scheme of introducing in the background technology one, scheme two, the situation of the every performance of this programme is as shown in the table:
| | Scheme | 1 | |
The present invention |
| Dirigibility | High | Low | In | |
| Capacity | Low | High | High | |
| Power consumption | In | High | Low | |
| Output frequency | Low | High | High | |
| Harmonic current is adjusted | Energy | Can not | Energy | |
| Reactive power is adjusted | Energy | Can not | Energy |
In sum, present two kinds of harmonic sources that use, the present invention has characteristics such as capacity is big, low in energy consumption, adjustment is flexible, is a kind of more reasonable design scheme.
The concrete course of work of the present invention is as follows:
According to the actual detected needs, an at first given target current value by regulating phase-shift controller 1 given resistance sizes, realizes the adjusting to the thyristor operating angle α of three-phase bridge full-controlled rectifier bridge, thereby changes the DC current I on the direct current reactor
d, 2 couples of DC current I of current sampler
dSampling also feeds back to phase-shift controller 1, this feedback current I
fCompare with the target current value,, then continue to regulate by above-mentioned steps as the miss the mark current value.：
During this circuit working steady state (SS), dc flat-wave reactor 3 both end voltage V
DcMean value be zero, this moment, trigger angle α approached 90 ° because
V
dc＝1.35Vcosα
V---exchange side line voltage
As actual measurement DC current I
dWhen being lower than setting value, phase-shift controller 1 can reduce trigger angle α gradually, makes V
Dc＞0, thus DC current is risen gradually.
When the actual measurement DC current was higher than setting value, controller can increase trigger angle α gradually, makes V
Dc＜0, thus DC current is descended gradually.
In addition, can analyze the harmonic wave and the reactive power of AC side, the result is as follows:
Only contain 6k ± 1 (k is a positive integer) subharmonic in the electric current;
Reactive power is calculated:
Q＝1.35VsinαI
d≈1.35VI
d
Because 90 ° of α ≈
By above-mentioned analytical calculation as can be known, by adjusting DC current I
d, just can reach the purpose of regulating harmonic current value and lagging reactive power.
Claims (4)
1. harmonic current and inductive reactive power generator, the DC side serial connection that it is characterized in that the rectifier (4) that is made of three-phase bridge full-controlled rectifier bridge is provided with direct current reactor (3) and current sampler (2), the two ends of current sampler (2) are connected with the current feedback input end of phase-shift controller (1), the corresponding connection of controllable silicon gate pole of phase-shift controller (1) signal output part and three-phase bridge full-controlled rectifier bridge, the voltage input end of three-phase bridge full-controlled rectifier bridge directly inserts electrical network, and phase-shift controller (1) voltage input end inserts electrical network by step-down transformer (5) back.
2. harmonic current as claimed in claim 1 and inductive reactive power generator is characterized in that described direct current reactor (3) is a dc flat-wave reactor.
3. harmonic current as claimed in claim 1 and inductive reactive power generator is characterized in that described phase-shift controller (1) is the controller that main body constitutes for discharge and recharge the control trigger board with FSC6M-1.
4. harmonic current as claimed in claim 1 and inductive reactive power generator is characterized in that described current sampler (2) adopts sampling resistor or Hall element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101555031A CN100541225C (en) | 2006-12-27 | 2006-12-27 | Harmonic current and inductive reactive power generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101555031A CN100541225C (en) | 2006-12-27 | 2006-12-27 | Harmonic current and inductive reactive power generating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1987511A CN1987511A (en) | 2007-06-27 |
| CN100541225C true CN100541225C (en) | 2009-09-16 |
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| CNB2006101555031A Expired - Fee Related CN100541225C (en) | 2006-12-27 | 2006-12-27 | Harmonic current and inductive reactive power generating device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924367B (en) * | 2010-09-02 | 2012-08-08 | 思源清能电气电子有限公司 | High-power intelligent harmonic and reactive current generating device based on IGBT |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0144556A1 (en) * | 1983-10-12 | 1985-06-19 | BBC Brown Boveri AG | Reactive power compensator for compensating a reactive current component in an AC network |
| US4975822A (en) * | 1989-05-19 | 1990-12-04 | International Fuel Cells Corporation | Harmonic reduction for multi-bridge converters |
| CN2458635Y (en) * | 2000-10-16 | 2001-11-07 | 北京超科力源电力技术有限公司 | Multifunctional harmonic powr electric source |
| CN200986587Y (en) * | 2006-12-27 | 2007-12-05 | 梁一桥 | Harmonic current and induction reactive power generator |
-
2006
- 2006-12-27 CN CNB2006101555031A patent/CN100541225C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0144556A1 (en) * | 1983-10-12 | 1985-06-19 | BBC Brown Boveri AG | Reactive power compensator for compensating a reactive current component in an AC network |
| US4975822A (en) * | 1989-05-19 | 1990-12-04 | International Fuel Cells Corporation | Harmonic reduction for multi-bridge converters |
| CN2458635Y (en) * | 2000-10-16 | 2001-11-07 | 北京超科力源电力技术有限公司 | Multifunctional harmonic powr electric source |
| CN200986587Y (en) * | 2006-12-27 | 2007-12-05 | 梁一桥 | Harmonic current and induction reactive power generator |
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| CN1987511A (en) | 2007-06-27 |
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