CN203800608U - Low-pressure dynamic reactive power compensator - Google Patents
Low-pressure dynamic reactive power compensator Download PDFInfo
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- CN203800608U CN203800608U CN201420218447.1U CN201420218447U CN203800608U CN 203800608 U CN203800608 U CN 203800608U CN 201420218447 U CN201420218447 U CN 201420218447U CN 203800608 U CN203800608 U CN 203800608U
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- 239000003990 capacitor Substances 0.000 claims abstract description 23
- 230000005611 electricity Effects 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 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
A low-pressure dynamic reactive power compensator is provided, wherein a circuit breaker, an AC contactor, a first current limiting reactor, and a vacuum switch of the compensator are connected in series with a second current limiting reactor and connected with an input terminal of an IGBT bridge-type inversion circuit; an output terminal of the IGBT bridge-type inversion circuit is connected in parallel with an RC capacitance-resistance filter circuit. A filtering capacitance circuit is connected with a three-phase power circuit between the current limiting reactor and the vacuum switch. A current-limiting resistor is connected in parallel with the vacuum switch. The filtering capacitance circuit comprises three resistors and three fixed capacitors. The GBT bridge-type inversion circuit comprises six insulated gate bipolar transistors and six clamping diodes constituting an H-bridge structure. According to the utility model, the IGBT is taken as the core, a harmonic wave current generated by a load is fast compensated, and harmonic wave pollution on a power grid is inhibited. Reactive compensation is performed in the range of compensation capability for improving a power factor, a three-phase unbalance current and a zero line current generated in the load side are inhibited, hence the electric power system is guaranteed to operate stably, efficiently with high quality.
Description
Technical field
The utility model relates to a kind of power transmission and distribution compensation arrangement, specifically a kind of low-voltage dynamic reactive power compensation.
Background technology
At present, transmission of electricity and distribution system normal operation are under power frequency component time, and along with the increase of a large amount of nonlinear-load power consumption equipments, the harmonic wave that injects electrical network also can increase thereupon, thereby can cause the wave distortion of voltage and electric current.Reactive power compensation, is called for short reactive power compensation, works to improve the power factor of electrical network in electronic power system, reduces the loss of supply transformer and conveying circuit, improves power supplying efficiency, improves power supply environment.So reactive power compensation device is in an indispensable very important position in power supply system.Reasonably select compensation arrangement, can accomplish to reduce to greatest extent the loss of network, power grid quality is improved.Otherwise, as selected or improper use, may cause electric power system voltage fluctuation, the factors such as harmonic wave increase.
Existing reactive power compensation mainly contains low pressure switching capacitance compensation arrangement (FC) and static var compensator (SVC), but these passive device compensation arrangements can not be realized the dynamic adjustments of reactive power compensation, there is following problem: (1) device compensation capacity can not continuously adjustable problem; (2) response time of current conventional low-voltage reactive compensator capable oversize, reach the several seconds, can not meet in tens ms the idle requirement compensating; (3) current reactive power compensator can only compensate capacitive or perceptual idle, can not realize the problem of positive and negative idle bidirectional compensating.
Utility model content
For above-mentioned deficiency, the utility model provides a kind of low-voltage dynamic reactive power compensation.
The technical scheme in the invention for solving the technical problem is: low-voltage dynamic reactive power compensation, comprise main circuit and control circuit, described control circuit real-time tracking load variations, and the switching of controlling main circuit carrys out dynamic compensation reactive power, it is characterized in that, described main circuit comprises circuit breaker, A.C. contactor, the first current limiting reactor, filter-capacitor circuit, vacuum switch, current-limiting resistance, the second current limiting reactor, IGBT bridge inverter main circuit and RC rc filter circuit; After described circuit breaker, A.C. contactor, the first current limiting reactor, vacuum switch and the second current limiting reactor series connection, be connected with the input of IGBT bridge inverter main circuit, the output of described IGBT bridge inverter main circuit is parallel with RC rc filter circuit, described filter-capacitor circuit is connected in parallel in the three-phase electricity circuit between the first current limiting reactor and vacuum switch, and described current-limiting resistance and vacuum switch are connected in parallel;
Described filter-capacitor circuit comprises 3 resistance and 3 fixed capacitors, and 3 resistance one end connect respectively three-phase electricity circuit, and the other end connects corresponding fixed capacitor one end, and the other end short circuit of 3 fixed capacitors connects;
Described IGBT bridge inverter main circuit comprises 6 igbts and 6 clamp diodes, and described 6 igbts form H bridge construction, described 6 clamp diodes and 6 corresponding connections of igbt.
Preferably, described vacuum switch is contactor.
Preferably, described IGBT bridge inverter main circuit also comprises 3 absorption capacitors.
Preferably, described RC rc filter circuit comprises 2 resistance and 2 electric capacity, the series circuit of described 2 resistance and two resistance capacitance parallel circuitss of 2 electric capacity compositions.
The beneficial effects of the utility model are: the utility model be take IGBT as core, can compensate fast the harmonic current that load produces, the harmonic pollution of inhibition to electrical network, within compensation ability scope, carry out reactive power compensation to improve power factor, suppress three-phase imbalance electric current and neutral line current that load side produces, ensure power system stability, efficient and high-quality ground operation.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
For clearly demonstrating the technical characterstic of this programme, below by embodiment, and in conjunction with its accompanying drawing, the utility model is elaborated.
As shown in Figure 1, a kind of low-voltage dynamic reactive power compensation of the present utility model, it comprises main circuit and control circuit, described control circuit real-time tracking load variations, and the switching of controlling main circuit carrys out dynamic compensation reactive power.Described main circuit comprises circuit breaker Q F, A.C. contactor KM1, the first current limiting reactor L1, filter-capacitor circuit, vacuum switch, current-limiting resistance, the second current limiting reactor L2, IGBT bridge inverter main circuit and RC rc filter circuit; Described vacuum switch adopts contactor KM2.Described circuit breaker Q F, A.C. contactor KM1, the first current limiting reactor L1, contactor KM2 is connected with the input of IGBT bridge inverter main circuit with after the second current limiting reactor L2 series connection, the output of described IGBT bridge inverter main circuit is parallel with RC rc filter circuit, described filter-capacitor circuit is connected in parallel in the three-phase electricity circuit between the first current limiting reactor and vacuum switch, filter-capacitor circuit comprises 3 resistance R 1, R2, R3 and 3 fixed capacitor C1, C2, C3, resistance R 1, R2, one end of R3 connects respectively three-phase electricity circuit, the other end connects corresponding capacitor C1, C2, one end of C3, capacitor C1, C2, the other end short circuit of C3 connects, described current-limiting resistance comprises and vacuum switch be connected in parallel resistance R 1, R2 and R3.Described IGBT bridge inverter main circuit comprises 6 igbt (IGBT, Insulated Gate Bipolar Transistor) and 6 clamp diodes, described 6 igbts form H bridge construction, described 6 clamp diodes and 6 corresponding connections of igbt; IGBT bridge inverter main circuit also comprises 3 absorption capacitor C4, C5 and C6.Described RC rc filter circuit comprises 2 resistance R 7, R8 and 2 capacitor C 7, C8, and they form the series circuit of R7, C7 parallel circuits and R8, C8 parallel circuits.
Control circuit described in the utility model comprises current transformer, A/D modular converter, dsp processor and drive circuit, described current transformer is connected with programmable logic controller (PLC) by A/D modular converter, and described programmable logic controller (PLC) is connected with contactor with IGBT switching device respectively by drive circuit.Wherein, described dsp processor adopts the high speed TMS320F28X series DSP chip of American TI Company.
The utility model is to take the reactive power compensator that IGBT is core IGBT inverter bridge is connected in parallel on electrical network by electronic components such as reactors, by harmonic component, idle component and asymmetrical component in control circuit current transformer detection load electric current, control the electric current that IGBT inverter bridge AC is exported, this IGBT bridge inverter main circuit absorbed rapidly or send needed offset current, realizing the object that the quality of power supply is administered.
The utility model is compared with Reactive Compensation Modes such as traditional SVG, FC, and SVG of the present utility model has following characteristics:
1, IGBT bridge inverter main circuit adopts Infineon or Mitsubishi's turn-off device (IGBT) module, strengthens system reliability;
2, control circuit adopts American TI Company high speed TMS320F28X series DSP chip to control;
3, dynamically the fast SVG of corresponding speed has 10ms with the interior idle special type of quick output, thereby has better compensation effect, and flickering is had to better inhibition ability, and the corresponding time of traditional SVC generally more than 60ms, the response time of FC is more than 1s;
4, start the little SVG of impact and partly adopt self-excitation mode to start, start fast and impulse current can be limited in to very little amplitude;
When 5, excellent harmonic wave special type realizes SVG function, can export the perfect reactive current without low-order harmonic (not containing harmonic wave, for power network compensation), also may export the harmonic wave (for Load harmonic) of set point number, the output current that is SVG is completely controlled, meet user's needs completely, and SVC, MCR etc. produce a large amount of uncontrollable harmonic currents, need to attach supporting with it filter branch and realize the filtering that self is produced to harmonic current;
6, compensation capacity can stepless continuous regulate;
7, efficient SVG adopts New Low Voltage loss IGBT power device, has saved transformer, has higher efficiency;
8, can to produce capacitive reactive power also can perception idle for same set of device, in capacitive and idle of perception, switches fast.
Except structure described in the utility model, all the other are prior art.
The above is preferred implementation of the present utility model; for those skilled in the art; not departing under the prerequisite of the utility model principle, can also make some improvements and modifications, these improvements and modifications are also regarded as protection range of the present utility model.
Claims (4)
1. low-voltage dynamic reactive power compensation, comprise main circuit and control circuit, described control circuit real-time tracking load variations, and the switching of controlling main circuit carrys out dynamic compensation reactive power, it is characterized in that, described main circuit comprises circuit breaker, A.C. contactor, the first current limiting reactor, filter-capacitor circuit, vacuum switch, current-limiting resistance, the second current limiting reactor, IGBT bridge inverter main circuit and RC rc filter circuit; After described circuit breaker, A.C. contactor, the first current limiting reactor, vacuum switch and the second current limiting reactor series connection, be connected with the input of IGBT bridge inverter main circuit, the output of described IGBT bridge inverter main circuit is parallel with RC rc filter circuit, described filter-capacitor circuit is connected in parallel in the three-phase electricity circuit between the first current limiting reactor and vacuum switch, and described current-limiting resistance and vacuum switch are connected in parallel;
Described filter-capacitor circuit comprises 3 resistance and 3 fixed capacitors, and 3 resistance one end connect respectively three-phase electricity circuit, and the other end connects corresponding fixed capacitor one end, and the other end short circuit of 3 fixed capacitors connects;
Described IGBT bridge inverter main circuit comprises 6 igbts and 6 clamp diodes, and described 6 igbts form H bridge construction, described 6 clamp diodes and 6 corresponding connections of igbt.
2. low-voltage dynamic reactive power compensation according to claim 1, is characterized in that, described vacuum switch is contactor.
3. low-voltage dynamic reactive power compensation according to claim 1, is characterized in that, described IGBT bridge inverter main circuit also comprises 3 absorption capacitors.
4. low-voltage dynamic reactive power compensation according to claim 1, is characterized in that, described RC rc filter circuit comprises 2 resistance and 2 electric capacity, the series circuit of described 2 resistance and two resistance capacitance parallel circuitss of 2 electric capacity compositions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420218447.1U CN203800608U (en) | 2014-04-30 | 2014-04-30 | Low-pressure dynamic reactive power compensator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420218447.1U CN203800608U (en) | 2014-04-30 | 2014-04-30 | Low-pressure dynamic reactive power compensator |
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| CN203800608U true CN203800608U (en) | 2014-08-27 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105703753A (en) * | 2014-11-28 | 2016-06-22 | 西门子公司 | Unbalanced current detection device for IGBT circuit, driver and method for controlling IGBT circuit |
| CN105703380A (en) * | 2016-04-19 | 2016-06-22 | 北京英博电气股份有限公司 | Low voltage control device for rural power grid |
| CN106300397A (en) * | 2016-08-30 | 2017-01-04 | 南京相量电气有限公司 | A kind of load unbalanced controlling device of three-phase power |
| CN108631342A (en) * | 2018-06-20 | 2018-10-09 | 贵州电网有限责任公司 | A kind of the three-phase imbalance compensation device and its control method of distribution transformer |
| CN109378716A (en) * | 2018-12-04 | 2019-02-22 | 兖州东方机电有限公司 | A kind of anti-explosion reactive compensation device |
| CN115377980A (en) * | 2022-10-25 | 2022-11-22 | 山东华天电气有限公司 | Active resonance suppression system, method and device for intermediate frequency furnace power distribution system |
-
2014
- 2014-04-30 CN CN201420218447.1U patent/CN203800608U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105703753A (en) * | 2014-11-28 | 2016-06-22 | 西门子公司 | Unbalanced current detection device for IGBT circuit, driver and method for controlling IGBT circuit |
| CN105703753B (en) * | 2014-11-28 | 2019-03-08 | 西门子公司 | For the unbalanced current detection device of IGBT circuit, driver and the method for controlling IGBT circuit |
| CN105703380A (en) * | 2016-04-19 | 2016-06-22 | 北京英博电气股份有限公司 | Low voltage control device for rural power grid |
| CN105703380B (en) * | 2016-04-19 | 2018-01-12 | 北京英博电气股份有限公司 | A kind of rural power grids low-voltage controlling device |
| CN106300397A (en) * | 2016-08-30 | 2017-01-04 | 南京相量电气有限公司 | A kind of load unbalanced controlling device of three-phase power |
| CN108631342A (en) * | 2018-06-20 | 2018-10-09 | 贵州电网有限责任公司 | A kind of the three-phase imbalance compensation device and its control method of distribution transformer |
| CN109378716A (en) * | 2018-12-04 | 2019-02-22 | 兖州东方机电有限公司 | A kind of anti-explosion reactive compensation device |
| CN115377980A (en) * | 2022-10-25 | 2022-11-22 | 山东华天电气有限公司 | Active resonance suppression system, method and device for intermediate frequency furnace power distribution system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160601 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: Shandong Sunkist Electrical Co., Ltd. Patentee after: STATE GRID SHANDONG ELECTRIC POWER COMPANY, PINGYIN POWER SUPPLY COMPANY Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee before: State Grid Corporation of China Patentee before: Shandong Sunkist Electrical Co., Ltd. Patentee before: State net Shandong Pingying County electric company |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20180430 |
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| CF01 | Termination of patent right due to non-payment of annual fee |