CN102496932A - Parallel voltage sag compensation device - Google Patents

Parallel voltage sag compensation device Download PDF

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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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phase
filter
rectifier
inductors
voltage
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尹忠东
王云飞
赵士硕
刘莫然
曹松伟
肖硕霜
孙濛濛
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North China Electric Power University
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North China Electric Power University
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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
    • 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

一种并联型电压暂降补偿装置，一种并联型电压暂降补偿装置。该装置包括三相电抗器、三相背靠背换流器、滤波器和滤波器；三相电抗器一端接入三相电网，另一端接三相负载；滤波器中三个电感的D端接入三相负载；三个电容的上端分别接三个电感的D端，下端相连接后接地；滤波器中三个电感的A端接入三相电网；三个电容的上端分别接三个电感的A端，下端相连接后接地；三相背靠背换流器由整流器(、稳压电容和逆变器组成。优点在于：装置将动态电压恢复和无功补偿、谐波治理的功能有机结合在一起，既能在系统发生电压暂降时快速实现动态电压恢复，又能在系统正常运行时对负荷进行无功补偿和谐波抑制，由装置可靠性好，效率高，功能多样。并联型电压暂降补偿装置中三相电抗器虽然会增加线路阻抗，但不会引起负载侧电压明显降低。

Figure 201110378892

A parallel voltage sag compensation device, a parallel voltage sag compensation device. The device includes a three-phase reactor, a three-phase back-to-back converter, a filter and a filter; one end of the three-phase reactor is connected to the three-phase grid, and the other end is connected to the three-phase load; the D terminals of the three inductors in the filter are connected to Three-phase load; the upper ends of the three capacitors are respectively connected to the D terminals of the three inductors, and the lower ends are connected to the ground; the A terminals of the three inductors in the filter are connected to the three-phase power grid; the upper ends of the three capacitors are respectively connected to the three inductors A terminal, the lower terminal is connected to the ground; the three-phase back-to-back converter is composed of a rectifier (, a voltage stabilizing capacitor and an inverter. The advantage is that the device organically combines the functions of dynamic voltage recovery, reactive power compensation and harmonic control. , not only can quickly realize dynamic voltage recovery when the system voltage sag occurs, but also can perform reactive power compensation and harmonic suppression for the load when the system is running normally. The device has good reliability, high efficiency and various functions. Parallel voltage temporary Although the three-phase reactor in the drop compensation device will increase the line impedance, it will not cause a significant drop in the load side voltage.

Figure 201110378892

Description

A kind of parallel connection type voltage dip compensation arrangement
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)

1.一种并联型电压暂降补偿装置，其特征在于：包括三相电抗器、三相背靠背换流器、滤波器和滤波器；三相电抗器(1)一端接入三相电网(6)，另一端接三相负载(5)；滤波器(4)中三个电感的D端接入三相负载(5)；三个电容的上端分别接三个电感的D端，下端相连接后接地；滤波器3中三个电感的A端接入三相电网(6)；三个电容的上端分别接三个电感的A端，下端相连接后接地；三相背靠背换流器(2)由整流器(21)、稳压电容(22)和逆变器(23)组成，整流器(21)由六个IGBT组成的三个半桥电路并联组成，每个半桥电路由上IGBT开关管的发射极与下IGBT开关管集电极连接，每个IGBT需并联一个二极管，三个连接点引出三条引线组成三相引线分别接滤波器(3)中的三个电感的B端；三个半桥电路中由上IGBT开关管的集电极相连接形成整流器的直流正极和由下IGBT开关管的发射极相连接形成整流器的直流负极；逆变器(23)的电路拓扑结构和整流器(21)的完全相同，逆变器(23)的三相引线分别接滤波器4中的三个电感的C端，逆变器(23)的直流正负极分别与整流器(21)的直流正负极相连接；稳压电容(22)的两端分别与整流器(21)的正极和负极连接；整流器(21)、稳压电容(22)和逆变器(23)组成的三相背靠背换流器与三相电抗器为并联关系。1. A parallel voltage sag compensation device, characterized in that: it comprises a three-phase reactor, a three-phase back-to-back converter, a filter and a filter; one end of the three-phase reactor (1) is connected to a three-phase grid (6 ), the other end is connected to the three-phase load (5); the D ends of the three inductors in the filter (4) are connected to the three-phase load (5); the upper ends of the three capacitors are respectively connected to the D ends of the three inductors, and the lower ends are connected to each other and then grounded; the A terminals of the three inductors in the filter 3 are connected to the three-phase grid (6); the upper ends of the three capacitors are respectively connected to the A terminals of the three inductors, and the lower ends are connected to the ground; the three-phase back-to-back converter (2 ) consists of a rectifier (21), a stabilizing capacitor (22) and an inverter (23). The rectifier (21) is composed of three half-bridge circuits composed of six IGBTs connected in parallel, and each half-bridge circuit is composed of an upper IGBT switch tube The emitter of the IGBT is connected to the collector of the lower IGBT switch tube, each IGBT needs to be connected in parallel with a diode, and three lead wires are drawn from the three connection points to form a three-phase lead wire respectively connected to the B terminals of the three inductors in the filter (3); the three and a half In the bridge circuit, the collectors of the upper IGBT switching tubes are connected to form the DC positive pole of the rectifier and the emitters of the lower IGBT switching tubes are connected to form the DC negative pole of the rectifier; the circuit topology of the inverter (23) and the rectifier (21) The three-phase leads of the inverter (23) are respectively connected to the C terminals of the three inductances in the filter 4, and the DC positive and negative poles of the inverter (23) are respectively connected to the DC positive and negative poles of the rectifier (21). The two ends of the voltage stabilizing capacitor (22) are respectively connected to the positive pole and the negative pole of the rectifier (21); the three-phase back-to-back converter composed of the rectifier (21), the voltage stabilizing capacitor (22) and the inverter (23) It is connected in parallel with the three-phase reactor.
CN2011103788925A 2011-11-24 2011-11-24 Parallel voltage sag compensation device Pending CN102496932A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
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

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CN101887074A (en) * 2010-05-24 2010-11-17 华北电力大学（保定） Three-phase voltage sag generator

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Cited By (10)

* Cited by examiner, † Cited by third party
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