摘要
提出了一种新型故障电流限流器 ,它由一个由脉宽调制原理控制的电感模块和一限流电感并联 ,然后再与一补偿电容串联组成。由脉宽调制原理控制的电感模块通过简单的占空比控制可以获得一连续可变的电抗 ,从而限流器可以快速、灵活地调节限流度和串联补偿度。文中详细分析了限流器的工作原理 ,指出它可运行于不同工作方式。最后建立了它的模型 ,并用电磁暂态程序(EMTP)进行了仿真。仿真结果表明 ,此装置性能良好 ,是电力系统中一种有效的保护设备。
A new fault current limiter (FCL) is proposed. It is composed of a compensation capacitor in series with a limiting reactor and a pulse width modulation (PWM) switched reactor module connected in parallel. The PWM switched reactor module provides a continuously adjustable reactance by duty cycle control, so that the FCL can limit the fault current and regulate the series compensation ratio rapidly and flexibly. The working principle of FCL is analyzed in detail, and it is pointed out that it can operate in different operation modes. Its mathematical model is established and the time-domain simulation is accomplished with EMTP. The simulation results show that its performance is excellent and it will be an effective protection device in power system.
出处
《电力系统自动化》
EI
CSCD
北大核心
2001年第2期40-44,共5页
Automation of Electric Power Systems
关键词
故障限流器
脉宽调制
串联补偿
拓扑结构
仿真
电力系统
Capacitors
Computer simulation
Current limiting reactors
Electric fault currents
Electric network topology
Limiters
Mathematical models
Pulse width modulation
Time domain analysis
