摘要
介绍一种适用于高压电网的三相接地系统桥式固态短路故障限流器的拓扑结构 ,分析了在各种可能的短路故障情况下限流电路的工作机理 ,给出了针对各种短路情况的控制策略 ,并用电力电子专用仿真软件 PSIM对其进行仿真验证。理论分析和仿真结果证明 ,该限流器具有对电力系统的正常运行无明显影响 ,在短路故障发生时无延时自动插入限流电抗器 ,断开故障电流时不会引起附加振荡和过电压 ,控制方法灵活 。
This paper introduces a novel bridge type solid state short circuit fault current limiter to grounded three-phase power systems. The principle of the circuit is analyzed. The control modes corresponding to the different short circuits are reached by analyzing. It is shown that, in normal operation condition the limiter has little effect on the power system. When short circuit fault happens the limiting inductor can be inserted automatically without delay to limit the short circuit current, there is no oscillation as well as over-voltage excited by the limiter when the fault current is switched off. Soft reclosing without impact can be realized through this limiter.
出处
《电力系统自动化》
EI
CSCD
北大核心
2002年第8期33-37,共5页
Automation of Electric Power Systems
关键词
三相接地系统
高压
短路故障限流器
控制策略
Closed loop control systems
Control system analysis
Electric grounding
Failure analysis
Short circuit currents
Waveform analysis
