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高压电器  2015 

一种基于触头受力监测实现断路器断口判定的方法

DOI: 10.13296/j.1001-1609.hva.2015.09.020, PP. 116-122

Keywords: 力传感器,断口状态,突变时刻,断路器,在线监测

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Abstract:

文中提出了一种准确判定断路器离线/带电运行时动静触头刚合/刚分时刻和断口状态的方法,该方法是在断路器绝缘拉杆的低压侧植入力传感器,通过力传感器监测断路器动作过程中灭弧室动端的力值―时间曲线,计算力值突变时刻及力值的大小,从而实现断路器动静触头刚合/刚分时刻及断口状态判定。目前基于该方法研制的机械特性在线监测装置,与断路器一同在国家质量监督检验中心(西高院试验站)完成了短路开断与关合试验和机械特性比对试验,监测的分合闸时间与实验室测试结果的时间误差小于±1ms。该方法有效实施为断路器的选相控制、机械特性在线监测、电寿命在线监测等特征参量的提取奠定了计算基础。

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