一种改进的新型桥式固态限流器的研究

Research of an Improved Bridge Type Solid-state Current Limiter

随着电网容量的不断扩大,短路电流限制技术已成为故障保护的一个研究热点。提出的新型桥式电路是在原有桥式拓扑结构上进行了改进,并提出了新的控制策略。详细介绍了新型桥式限流器的基本工作原理及特点,给出了基于Matlab/Simulink软件的仿真分析和基于天津大学动模实验室的实验结果。仿真与实验结果证明了所提出新型拓扑与控制策略的正确性。

As the expanding of power system capacity, the technologies of short circuit current limiting in power systems have been concerned greatly. This paper introduces a novel bridge type solid state current limiter and a new control strategy is proposed. The characters and operating principle of a novel bridge solid-state current limiter has been developed in detail. Simulation based on Matlab/Simulink is analysed and a laboratory set-up in which the thyristor is controlled by a single chip computer is tested. The results show that the FCL mode is successful in both computer simulation and laboratory test in limiting the fault currents.