CN102496932A - Parallel voltage sag compensation device - Google Patents
Parallel voltage sag compensation device Download PDFInfo
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- CN102496932A CN102496932A CN2011103788925A CN201110378892A CN102496932A CN 102496932 A CN102496932 A CN 102496932A CN 2011103788925 A CN2011103788925 A CN 2011103788925A CN 201110378892 A CN201110378892 A CN 201110378892A CN 102496932 A CN102496932 A CN 102496932A
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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 parallel voltage sag compensation device is disclosed. The device comprises: a three-phase reactor, a three-phase back-to-back converter, a filter and the filter. One end of the three-phase reactor is connected into a three-phase network and the other end is connected to a three-phase load. D terminals of three inductors in the filter are connected to the three-phase load. Upper ends of three capacitors are connected to the D terminals of the three inductors respectively, lower ends are connected with each other and then are grounded. A terminals of the three inductors in the filter are connected to the three-phase network. The upper ends of the three capacitors are connected to the A terminals of the three inductors respectively, the lower ends are connected with each other and then are grounded. The three-phase back-to-back converter is formed by a rectifier, a voltage stabilization capacitor and an inverter. The device has the following advantages that: a dynamic voltage recovery and reactive compensation function and a harmonic wave treatment function are organically combined; dynamic voltage recovery can be rapidly realized when the system generates voltage sag; the reactive compensation and harmonic wave inhibition can be performed to the load when the system operates normally; reliability is good, efficiency is high and various functions are possessed. In the parallel voltage sag compensation device, the three-phase reactor can increase line impedance but can not cause obvious reduction of the voltage of a load side.
Description
Technical field
The invention belongs to power system voltage and fall the compensation technique field temporarily, a kind of parallel connection type voltage dip compensation arrangement particularly is provided.
Background technology
When incidents such as failed because, big capacity induction machine startup, thunderbolt, switching manipulation, transformer and capacitor group switching in the electrical power trans mission/distribution system, all can cause voltage dip.Voltage dip has become and has threatened that each power consumption equipment of modern society is normal, the main interference of trouble free service, and becomes the very important factor of threat informationization society's power supply quality.At present, dynamic voltage compensator (Dynamic Voltage Restorer is called for short DVR) has also obtained increasing application gradually, but because the probability that voltage dip takes place is less, and the DVR most of the time all is in holding state, efficient is not high.The cascaded structure of the series inverter of line attachment also can increase line impedance among the DVR, and load current all flows through this tandem arrangement, and line loss is big; Can cause that also load voltage reduces, when the band nonlinear load, this impedance also possibly produce the load voltage harmonic wave; When DVR breaks down; Because device is connected in the line, also can cause load to have a power failure, power supply reliability is poor.
The invention provides a kind of parallel connection type voltage dip compensation arrangement, the voltage dip that it can the dynamic compensation electric power system, and when voltage dip does not take place in electric power system the idle harmonic of compensating load.Converter and three-phase reactor are formed back-to-back by three-phase for it; Three-phase reactor two ends one termination is gone into electric power system, another termination load, and three-phase converter back-to-back is connected in parallel on the three-phase reactor two ends; Three-phase converter rectification side joint electric power system back-to-back, the load of inversion side joint.
Summary of the invention
The object of the present invention is to provide a kind of parallel connection type voltage dip compensation arrangement, be used for the voltage dip compensation of electric power system.It realizes that based on PWM rectification control technology the converter dc voltage is stable back-to-back; The harmonic wave of realizing load through three-phase inversion control suppresses and reactive power compensation; When system's generation voltage dip, inject the accurately reactive power of control through inverter, can between the emergence period load voltage be lifted to regulation numerical value at voltage dip.
The present invention includes three-phase reactor 1, three-phase converter 2, filter 3 and filter 4 back-to-back, three-phase reactor 1 one terminations are gone into three phase network 6, another termination threephase load 5; The D termination of three inductance is gone into threephase load 5 in the filter 4; The upper end of three electric capacity connects the D end of three inductance respectively, and lower ends connects back ground connection; The A termination of three inductance is gone into three phase network 6 in the filter 3; The upper end of three electric capacity connects the A end of three inductance respectively, and lower ends connects back ground connection; Wherein, three-phase back-to-back converter 2 form by rectifier 21, electric capacity of voltage regulation 22 and inverter 23.Shown in accompanying drawing 1.Rectifier 21 is composed in parallel by three half-bridge circuits that six IGBT form; Each half-bridge circuit is connected with following IGBT switching tube collector electrode by the emitter of last IGBT switching tube; Each IGBT needs diode of parallel connection, and three tie points are drawn three lead-in wires and formed the B end that the three-phase lead-in wire connects three inductance in the filter 3 respectively; The direct current negative pole that is connected the direct-flow positive pole that forms rectifier and is connected and forms rectifier by the collector electrode of last IGBT switching tube in three half-bridge circuits by the emitter of IGBT switching tube down; The circuit topological structure of inverter 23 and rectifier 21 identical, three phase terminals of inverter 23 connect the C end of three inductance in the filter 4 respectively, and the direct current both positive and negative polarity of inverter 23 is connected with the direct current both positive and negative polarity of rectifier 21 respectively; The two ends of electric capacity of voltage regulation 22 are connected with negative pole with the positive pole of rectifier 21 respectively.The three-phase that rectifier 21, electric capacity of voltage regulation 22 and inverter 23 are formed converter back-to-back is parallelly connected relation with three-phase reactor.
The operation principle of parallel connection type voltage dip compensation arrangement is summarized as follows.
When electric power system normally moved, three-phase converter back-to-back reduced through the voltage that injects the generation of reactive power compensation three-phase reactor, detects the idle harmonic of load-side simultaneously, adopted hysteresis current control to compensate; When electric power system generation voltage dip, calculate the reactive compensation capacity of inverter needs output according to the degree of voltage dip, then by three-phase back-to-back the inverter in the converter send corresponding reactive current to keep load side voltage in the scope of regulation.
The invention has the advantages that: device organically combines the function of dynamic electric voltage recovery and reactive power compensation, harmonic wave control; Can when system's generation voltage dip, recover by the Rapid Realization dynamic electric voltage; In the time of normally moving in system again load is carried out the reactive power compensation harmonic and suppress, because the reactor series operation is only arranged, so device reliability is good; Efficient is high, diverse in function.Though three-phase reactor can increase line impedance in the parallel connection type voltage dip compensation arrangement, can not cause that load side voltage obviously reduces.
Description of drawings
Fig. 1 is the circuit structure diagram of a kind of parallel connection type voltage dip compensation arrangement of the present invention.Wherein, three-phase reactor 1, three-phase converter 2, filter 3, filter 4, threephase load 5, three phase network 6, rectifier 21, electric capacity of voltage regulation 22, inverter 23 back-to-back.
Embodiment
Fig. 1 is a kind of embodiment of the present invention.
The present invention includes three-phase reactor 1, three-phase converter 2, filter 3 and filter 4 back-to-back, three-phase reactor 1 one terminations are gone into three phase network 6, another termination threephase load 5; The D termination of three inductance is gone into threephase load 5 in the filter 4; The upper end of three electric capacity connects the D end of three inductance respectively, and lower ends connects back ground connection; The A termination of three inductance is gone into three phase network 6 in the filter 3; The upper end of three electric capacity connects the A end of three inductance respectively, and lower ends connects back ground connection; Wherein, Three-phase converter 2 back-to-back is made up of rectifier 21, electric capacity of voltage regulation 22 and inverter 23.
Three-phase reactor 1 one terminations are gone into three phase network 6, another termination threephase load 5.Three-phase converter 2 back-to-back is made up of rectifier 21, electric capacity of voltage regulation 22 and inverter 23; Rectifier 21 is composed in parallel by three half-bridge circuits that six IGBT form; Each half-bridge circuit is connected with following IGBT switching tube collector electrode by the emitter of last IGBT switching tube; Each IGBT needs diode of parallel connection, and three tie points are drawn three lead-in wires and formed the B end that the three-phase lead-in wire connects three inductance in the filter 3 respectively; The direct current negative pole that is connected the direct-flow positive pole that forms rectifier and is connected and forms rectifier by the collector electrode of last IGBT switching tube in three half-bridge circuits by the emitter of IGBT switching tube down.The circuit topological structure of inverter is identical, and difference is that three phase terminals of inverter connect the C end of three inductance in the filter 4 respectively, and the direct current both positive and negative polarity of inverter is connected with the direct current both positive and negative polarity of rectifier respectively.The two ends of electric capacity of voltage regulation are connected with negative pole with the positive pole of rectifier respectively.The three-phase that rectifier, electric capacity of voltage regulation and inverter are formed converter back-to-back is parallelly connected relation with three-phase reactor.The A termination of three inductance is gone into three phase network 6 in the filter 3; The upper end of three electric capacity connects the A end of three inductance respectively, and lower ends connects back ground connection.The D termination of three inductance is gone into threephase load 5 in the filter 4; The upper end of three electric capacity connects the D end of three inductance respectively, and lower ends connects back ground connection.
Claims (1)
1. a parallel connection type voltage dip compensation arrangement is characterized in that: comprise three-phase reactor, three-phase converter, filter and filter back-to-back; Three-phase reactor (1) one termination is gone into three phase network (6), another termination threephase load (5); The D termination of three inductance is gone into threephase load (5) in the filter (4); The upper end of three electric capacity connects the D end of three inductance respectively, and lower ends connects back ground connection; The A termination of three inductance is gone into three phase network (6) in the filter 3; The upper end of three electric capacity connects the A end of three inductance respectively, and lower ends connects back ground connection; Three-phase converter (2) back-to-back is made up of rectifier (21), electric capacity of voltage regulation (22) and inverter (23); Rectifier (21) is composed in parallel by three half-bridge circuits that six IGBT form; Each half-bridge circuit is connected with following IGBT switching tube collector electrode by the emitter of last IGBT switching tube; Each IGBT needs diode of parallel connection, and three tie points are drawn three lead-in wires and formed the B end that the three-phase lead-in wire connects three inductance in the filter (3) respectively; The direct current negative pole that is connected the direct-flow positive pole that forms rectifier and is connected and forms rectifier by the collector electrode of last IGBT switching tube in three half-bridge circuits by the emitter of IGBT switching tube down; The circuit topological structure of inverter (23) and rectifier (21) identical, three phase terminals of inverter (23) connect the C end of three inductance in the filter 4 respectively, and the direct current both positive and negative polarity of inverter (23) is connected with the direct current both positive and negative polarity of rectifier (21) respectively; The two ends of electric capacity of voltage regulation (22) are connected with negative pole with the positive pole of rectifier (21) respectively; The three-phase that rectifier (21), electric capacity of voltage regulation (22) and inverter (23) are formed converter back-to-back is parallelly connected relation with three-phase reactor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103788925A CN102496932A (en) | 2011-11-24 | 2011-11-24 | Parallel voltage sag compensation device |
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| CN2011103788925A CN102496932A (en) | 2011-11-24 | 2011-11-24 | Parallel voltage sag compensation device |
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| CN102496932A true CN102496932A (en) | 2012-06-13 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882210A (en) * | 2012-10-08 | 2013-01-16 | 东南大学 | Active power filter (APF) device based on double vehicle stability control (VSC) interactive parallelly-connected harmonic compensation open loop and closed loop combination |
| CN104993711A (en) * | 2015-05-22 | 2015-10-21 | 国网河南省电力公司电力科学研究院 | Voltage sag transition process simulation device and method |
| 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 |
| CN107888082A (en) * | 2017-12-15 | 2018-04-06 | 天水电气传动研究所有限责任公司 | A kind of converter with Harmonics elimination and no-power compensation function |
| CN109193559A (en) * | 2018-10-30 | 2019-01-11 | 广州供电局有限公司 | Power supply fast switching system, method for handover control and device |
| CN117674050A (en) * | 2023-12-04 | 2024-03-08 | 广东明能科技有限公司 | Short-circuit protection device and adjusting method for converter |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100220499A1 (en) * | 2009-02-27 | 2010-09-02 | Abb Research Ltd. | Hybrid distribution transformer with an integrated voltage source converter |
| CN101887074A (en) * | 2010-05-24 | 2010-11-17 | 华北电力大学（保定） | Three-phase voltage sag generator |
-
2011
- 2011-11-24 CN CN2011103788925A patent/CN102496932A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100220499A1 (en) * | 2009-02-27 | 2010-09-02 | Abb Research Ltd. | Hybrid distribution transformer with an integrated voltage source converter |
| CN101887074A (en) * | 2010-05-24 | 2010-11-17 | 华北电力大学（保定） | Three-phase voltage sag generator |
Non-Patent Citations (1)
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| 甄晓亚等: "并联型电网短路限流多目标控制", 《华东电力》, vol. 39, no. 7, 31 July 2011 (2011-07-31), pages 1109 - 1112 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882210A (en) * | 2012-10-08 | 2013-01-16 | 东南大学 | Active power filter (APF) device based on double vehicle stability control (VSC) interactive parallelly-connected harmonic compensation open loop and closed loop combination |
| CN102882210B (en) * | 2012-10-08 | 2014-12-17 | 东南大学 | Active power filter (APF) device based on double vehicle stability control (VSC) interactive parallelly-connected harmonic compensation open loop and closed loop combination |
| CN104993711A (en) * | 2015-05-22 | 2015-10-21 | 国网河南省电力公司电力科学研究院 | Voltage sag transition process simulation device and method |
| CN104993711B (en) * | 2015-05-22 | 2018-01-30 | 国网河南省电力公司电力科学研究院 | A kind of voltage dip transient process analogue means and method |
| 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 |
| CN107888082A (en) * | 2017-12-15 | 2018-04-06 | 天水电气传动研究所有限责任公司 | A kind of converter with Harmonics elimination and no-power compensation function |
| CN109193559A (en) * | 2018-10-30 | 2019-01-11 | 广州供电局有限公司 | Power supply fast switching system, method for handover control and device |
| CN117674050A (en) * | 2023-12-04 | 2024-03-08 | 广东明能科技有限公司 | Short-circuit protection device and adjusting method for converter |
| CN117674050B (en) * | 2023-12-04 | 2024-06-25 | 广东明能科技有限公司 | Short-circuit protection device and adjusting method for converter |
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Application publication date: 20120613 |