CN104716653A - Reactive compensation system - Google Patents
Reactive compensation system Download PDFInfo
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- CN104716653A CN104716653A CN201310674674.5A CN201310674674A CN104716653A CN 104716653 A CN104716653 A CN 104716653A CN 201310674674 A CN201310674674 A CN 201310674674A CN 104716653 A CN104716653 A CN 104716653A
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- voltage
- grid side
- reactive power
- power compensation
- control system
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- 239000003990 capacitor Substances 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 4
- 230000026676 system process Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
本发明公开了一种无功补偿系统，包括与所述电网侧依次连接的LCL滤波电路、IGBT桥和电容、与所述电网侧依次连接的晶闸管和无功补偿单元、与所述电网侧依次连接的电压电流检测电路和控制系统，其中：所述电容的两端均连接所述IGBT桥；所述电压电流检测电路采集电网侧的电压信号和电流信号，传给所述控制系统；所述控制系统对接收的电压信号和电流信号处理，根据处理结果分别发出控制信号给所述晶闸管和IGBT桥。本发明能根据采集的电压、电流信号，自动连续调节无功参量，快速、高精度进行无功功率补偿。
The invention discloses a reactive power compensation system, comprising an LCL filter circuit, an IGBT bridge and a capacitor sequentially connected to the grid side, a thyristor and a reactive power compensation unit sequentially connected to the grid side, and a reactive power compensation unit sequentially connected to the grid side A connected voltage and current detection circuit and a control system, wherein: both ends of the capacitor are connected to the IGBT bridge; the voltage and current detection circuit collects voltage signals and current signals on the grid side and transmits them to the control system; The control system processes the received voltage signal and current signal, and sends control signals to the thyristor and the IGBT bridge respectively according to the processing results. The invention can automatically and continuously adjust reactive parameters according to the collected voltage and current signals, and perform reactive power compensation quickly and with high precision.
Description
技术领域technical field
本发明涉及无功补偿领域，尤其涉及一种无功补偿系统。The invention relates to the field of reactive power compensation, in particular to a reactive power compensation system.
背景技术Background technique
目前，各变电站标配的无功补偿设备，大多为功率因数控制器加接触器或是电容器控制的电容器组投切方式，因频繁投切而导致电容器寿命不长，并且因为要人工参与的环节较多，不能连续的无功补偿。因此，研究一种相对自动化且快速、高精度的补偿系统是本申请人致力于解决的问题。At present, most of the standard reactive power compensation equipment in each substation is a power factor controller plus a contactor or a capacitor bank switching method controlled by a capacitor. Due to frequent switching, the life of the capacitor is not long, and because of the need for manual participation More, can not continuous reactive power compensation. Therefore, researching a relatively automatic, fast and high-precision compensation system is a problem that the applicant is committed to solving.
发明内容Contents of the invention
本发明的目的在于克服现有技术的缺陷而提供一种无功补偿系统，能根据采集的电压、电流信号，自动连续调节无功参量，快速、高精度进行无功功率补偿。The purpose of the present invention is to overcome the defects of the prior art and provide a reactive power compensation system, which can automatically and continuously adjust reactive power parameters according to the collected voltage and current signals, and perform reactive power compensation quickly and with high precision.
实现上述目的的技术方案是：The technical scheme for realizing the above-mentioned purpose is:
一种无功补偿系统，外接电网侧，所述无功补偿系统包括与所述电网侧依次连接的LCL滤波电路（无源滤波电路）、IGBT（绝缘栅双极晶体管）桥和电容、与所述电网侧依次连接的晶闸管和无功补偿单元、与所述电网侧依次连接的电压电流检测电路和控制系统，其中：A reactive power compensation system, externally connected to the grid side, the reactive power compensation system includes an LCL filter circuit (passive filter circuit), an IGBT (insulated gate bipolar transistor) bridge and a capacitor connected in sequence to the grid side, and the Thyristors and reactive power compensation units sequentially connected to the grid side, voltage and current detection circuits and control systems sequentially connected to the grid side, wherein:
所述电容的两端均连接所述IGBT桥；Both ends of the capacitor are connected to the IGBT bridge;
所述电压电流检测电路采集电网侧的电压信号和电流信号，传给所述控制系统；The voltage and current detection circuit collects voltage signals and current signals on the grid side, and transmits them to the control system;
所述控制系统对接收的电压信号和电流信号处理，根据处理结果分别发出控制信号给所述晶闸管和IGBT桥。The control system processes the received voltage signal and current signal, and sends control signals to the thyristor and the IGBT bridge respectively according to the processing results.
上述的无功补偿系统，其中，所述LCL滤波电路包括三个电容器和两组电抗器，其中：In the above reactive power compensation system, wherein the LCL filter circuit includes three capacitors and two sets of reactors, wherein:
所述两组电抗器相互连接，每组电抗器包括三个并列的电抗器；The two groups of reactors are connected to each other, and each group of reactors includes three parallel reactors;
所述三个电容器各自的一端分别连接所述每组电抗器中并列的三个电抗器，各自的另一端相互连接。One end of each of the three capacitors is respectively connected to three parallel reactors in each group of reactors, and the other ends of each are connected to each other.
本发明的有益效果是：本发明能根据采集的电压、电流信号，连续自动调节无功参量，快速、高精度进行无功功率补偿，达到系统所设置的功率因数，实用性好。The beneficial effects of the present invention are: the present invention can continuously and automatically adjust reactive parameters according to the collected voltage and current signals, perform reactive power compensation quickly and with high precision, and reach the power factor set by the system, and has good practicability.
附图说明Description of drawings
图1是本发明的无功补偿系统的系统结构图。Fig. 1 is a system structure diagram of the reactive power compensation system of the present invention.
具体实施方式Detailed ways
下面将结合附图对本发明作进一步说明。The present invention will be further described below in conjunction with accompanying drawing.
请参阅图1，本发明的一种无功补偿系统2，外接电网侧1，无功补偿系统2包括与电网侧1依次连接的LCL滤波电路21、IGBT桥22和电容C、与电网侧1依次连接的晶闸管23和无功补偿单元24、与电网侧1依次连接的电压电流检测电路25和控制系统26，其中：Referring to Fig. 1, a kind of reactive power compensation system 2 of the present invention is externally connected to the grid side 1, and the reactive power compensation system 2 includes an LCL filter circuit 21, an IGBT bridge 22 and a capacitor C connected to the grid side 1 in sequence, and connected to the grid side 1 Thyristor 23 and reactive power compensation unit 24 connected in sequence, voltage and current detection circuit 25 and control system 26 connected in sequence to grid side 1, wherein:
电容C的两端均连接IGBT桥22；Both ends of the capacitor C are connected to the IGBT bridge 22;
电压电流检测电路25采集电网侧的电压信号和电流信号，并传给控制系统26；控制系统26对接收的电压信号和电流信号处理，根据处理结果分别发出控制信号给晶闸管23和IGBT桥22，晶闸管23根据接收的控制信号进行通断，接通后，无功补偿单元24进行补偿；IGBT桥22由六个绝缘栅双极晶体管组成，根据接收的控制信号动作。The voltage and current detection circuit 25 collects voltage signals and current signals on the grid side, and transmits them to the control system 26; the control system 26 processes the received voltage signals and current signals, and sends control signals to the thyristor 23 and the IGBT bridge 22 respectively according to the processing results, The thyristor 23 is turned on and off according to the received control signal, and after being turned on, the reactive power compensation unit 24 performs compensation; the IGBT bridge 22 is composed of six insulated gate bipolar transistors, and operates according to the received control signal.
LCL滤波电路31包括三个电容器和两组电抗器，其中：The LCL filter circuit 31 includes three capacitors and two groups of reactors, wherein:
两组电抗器相互连接，每组电抗器包括三个并列的电抗器；Two groups of reactors are connected to each other, and each group of reactors includes three parallel reactors;
三个电容器各自的一端分别连接每组电抗器中并列的三个电抗器，各自的另一端相互连接。One end of each of the three capacitors is respectively connected to three parallel reactors in each group of reactors, and the other ends of each are connected to each other.
综上所述，本发明的一种无功补偿系统3，能根据采集的电压、电流信号，连续自动调节无功参量，快速、高精度进行无功功率补偿，达到系统所设置的功率因数，实用性好。In summary, a reactive power compensation system 3 of the present invention can continuously and automatically adjust reactive power parameters according to the collected voltage and current signals, perform reactive power compensation quickly and with high precision, and achieve the power factor set by the system, Good practicality.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310674674.5A CN104716653A (en) | 2013-12-11 | 2013-12-11 | Reactive compensation system |
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| CN201310674674.5A CN104716653A (en) | 2013-12-11 | 2013-12-11 | Reactive compensation system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202014100U (en) * | 2011-04-11 | 2011-10-19 | 河南天创风电设备有限公司 | Dynamic reactive power compensator for photovoltaic power station grid connected inverter |
| CN102570472A (en) * | 2010-12-07 | 2012-07-11 | 吉林省电力有限公司四平供电公司 | Comprehensive compensation control device for effectively improving power quality |
| CN102983575A (en) * | 2011-09-07 | 2013-03-20 | 上海市电力公司 | Reactive compensation system |
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- 2013-12-11 CN CN201310674674.5A patent/CN104716653A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570472A (en) * | 2010-12-07 | 2012-07-11 | 吉林省电力有限公司四平供电公司 | Comprehensive compensation control device for effectively improving power quality |
| CN202014100U (en) * | 2011-04-11 | 2011-10-19 | 河南天创风电设备有限公司 | Dynamic reactive power compensator for photovoltaic power station grid connected inverter |
| CN102983575A (en) * | 2011-09-07 | 2013-03-20 | 上海市电力公司 | Reactive compensation system |
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