Analysis and Suppression on Resonance of Reactive Power Compensation Capacitor in DVR System

YANG Daoshu; XIAO Guochun; LIU Min; HAN Xiaoli

doi:10.14044/j.1674-1757.pcrpc.2016.06.004

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Analysis and Suppression on Resonance of Reactive Power Compensation Capacitor in DVR System

更新时间：2024-09-14

- Analysis and Suppression on Resonance of Reactive Power Compensation Capacitor in DVR System
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 37, Issue 6, Pages: 17-23(2016)
- 作者机构：
  
  西安交通大学电气工程学院
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2016.06.004
  CLC： TM711;TM761
- Published：2016，
- 稿件说明：
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[1]杨道淑,肖国春,刘敏,韩笑黎.DVR系统中无功补偿电容谐振分析及抑制[J].电力电容器与无功补偿,2016,37(06):17-23.

YANG DAOSHU, XIAO GUOCHUN, LIU MIN, et al. Analysis and Suppression on Resonance of Reactive Power Compensation Capacitor in DVR System. [J]. Power capacitor & reactive power compensation, 2016, 37(6): 17-23.
[1]杨道淑,肖国春,刘敏,韩笑黎.DVR系统中无功补偿电容谐振分析及抑制[J].电力电容器与无功补偿,2016,37(06):17-23. DOI： 10.14044/j.1674-1757.pcrpc.2016.06.004.

YANG DAOSHU, XIAO GUOCHUN, LIU MIN, et al. Analysis and Suppression on Resonance of Reactive Power Compensation Capacitor in DVR System. [J]. Power capacitor & reactive power compensation, 2016, 37(6): 17-23. DOI： 10.14044/j.1674-1757.pcrpc.2016.06.004.

摘要

针对动态电压恢复器（DVR）系统中由无功补偿电容器可能引起的谐振问题及抑制方法进行了研究。结果表明:当补偿电容器位于电网侧时

电容器与电网等效电感之间的谐振会引起电网电压畸变

此时DVR能稳定运行

但谐波补偿效果会减弱;当补偿电容器位于负载侧时

电容器与DVR滤波电感之间的谐振很容易使系统阻尼不足导致系统不稳定。将补偿电容器引入控制环

通过减小负载电流的前馈系数可以增大系统阻尼

保证系统稳定。仿真结果验证了上述分析的正确性。

Abstract

In this paper

the issue of resonance and suppression method possibly caused by reactive power compensation capacitor in dynamic voltage restorer（DVR）system is studied. It is shown by the result that when compensation capacitor is at the grid side

grid voltage distortion is caused by the resonance between capacitor and equivalent inductance of grid and

at this time

DVR can operate stably but the harmonic compensation result is decreased. While compensation capacitor is at the load side

the resonance between capacitor and the DVR filtering inductance will likely lead to the system unstable due to insufficient damp. By introducing compensation capacitors into the control loop

the system damp is increased by way of reducing the feed forward coefficient of load current to assure system stability. The correctness of above analysis is verified by the simulation result.

关键词

动态电压恢复器（DVR）无功补偿电容谐振阻尼

Keywords

dynamic voltage restorer（DVR）reactive power compensation capacitorresonancedamping

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