一种经济型故障限流器及其控制策略

摘要

This paper introduces an economical short-circuit fault current limiter, which uses the flexible transmission technology to improve power quality and stability. In the normal operation of transmission lines,the limiter is wired in the line in series with almost no energy loss;when a fault occurs,it is quickly switched to the fault current limiter mode to limit the short-circuit current efficiently. This paper analyzes the setting of the parameters and control strategies of this economical current limiter, and carries out analysis of its characteristics and simulation of its electro-magnetic transient stability. The results show that the model has good performance, and its control limit strategy is feasible.%提出了一种应用柔性输电技术改善电网电能质量和提高稳定性的经济型短路故障限流器.在输电线路正常运行时,串联在线路中,几乎无能量损耗；当有故障发生时,快速切换到故障限流模式,有效的限制短路电流.分析了这种经济限流器的参数整定及其控制策略,并利用PSCAD和MATLAB软件对其进行了特性分析和电磁暂态稳定性仿真,结果证明了该模型有良好的限流性能和控制策略的可行性.