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电网技术  2012 

基于限流器本体信号的短路故障快速识别方法

, PP. 247-251

Keywords: 串联谐振型限流器,故障识别,谐振电压差法,快速触发系统

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Abstract:

短路故障快速识别是串联谐振型限流器控制策略的重要环节。文章利用限流器谐振元件电压差在短路故障时会发生突变的机理,提出谐振电压差识别方法。从合闸角和故障距离等参数角度分析了识别方法的时间特性,搭建了基于可编程技术的触发系统,用模型实验验证了所提方法的快速性。仿真结果表明谐振电压差法响应速度快,而且不受故障参数变化的影响,但会受到断路器开闭操作的干扰,因此谐振电压差法需和短路电流瞬时值法相互配合。模型实验表明谐振电压差法能在1ms内发出故障判据信号,从而能极大地提高限流器工作的快速性。

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