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电网技术  2014 

适用于受端检测的自适应累积量故障检测法

DOI: 10.13335/j.1000-3673.pst.2014.12.038, PP. 3509-3515

Keywords: 故障检测,受端检测,自适应累积量,突变量

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Abstract:

为解决自适应累积量故障检测法在线路受端检测故障失败的问题,提出了一种适用于线路受端检测的自适应累积量故障检测方法。利用实时计算的电流相量作为门槛值,将采样点的瞬时值与门槛值的差值作为第一个输出指数,同时,将采样点之前半个周期计算的电流相量值与门槛值的差值作为第2个输出指数,通过判断连续3个输出指数的大小判断故障是否发生。理论分析和仿真结果表明,该方法应用于故障检测时有效地解决了受端检测故障失败的问题,快速且安全可靠,同时,不受线路负荷、过渡电阻、故障时刻等因素的影响。

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