基于半控桥的三相接地系统短路限流器及其控制方法  

Research of fault current limiter based on half-controlled rectifier bridge for three-phase four-wire power system

作　　者：张艳莉[1] 费万民[1] 姜宁秋[1] 吕征宇[2] 

机构地区：[1]南京师范大学电气与自动化工程学院,江苏南京210042 [2]浙江大学电气工程学院,浙江杭州310027

出　　处：《电力自动化设备》2007年第6期51-55,共5页Electric Power Automation Equipment

摘　　要：提出了一种用于三相接地系统的基于半控桥的新型短路故障限流器拓扑结构。对新型限流器在单相对地短路、两相对地短路和三相短路状态下的控制方法和限流工作原理进行了详细介绍。该限流器中含有一对功率二极管组成的桥路,可以自动为直流电感提供续流通道,因此,在短路故障发生并被检测到之后,只需要控制关断与故障相相连接的桥臂上的开关管,则故障相即可退出系统,非故障相仍然正常供电。采用PSIM6软件,对各种短路模式下的限流方法及限流效果进行仿真研究。制作了小容量的半控桥式限流器实验装置,并进行了详细的实验研究,给出了3种短路模式下主要变量的实验波形。仿真和实验结果一致,验证了所提限流器及其控制策略的有效性和实用性。The FCL（Fauh Current Limiter） based on half-controlled rectifier bridge is proposed for three -phase four-wire power systems. Its current limiting principles and control methods are depicted in detail for the grounding faults of single phase,two phases and three phases. The rectifier bridge includes a couple of power diodes,which provides automatically the path for the continuing current of DC reactor. Whenever a fault is detected,the controllable switches in the fault phase（s） is simply turned off to drop out the fault phase（s） and the normal phase（s） keeps operating. Simulations with PSIM6 for various fault modes are carried out. An experimental FCL with small power capacity is established and investigated. Experimental and simulation results are conformable to each other, showing the validity and practicability of the FCL and its control strategy.

关 键 词：自关断器件 半控整流桥 短路限流器 

分 类 号：TM713[电气工程—电力系统及自动化]