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基于电机电流检测的高压隔离开关机械故障诊断

DOI: 10.13334/j.0258-8013.pcsee.2015.13.032, PP. 3459-3466

Keywords: 高压隔离开关,电机电流信号分析,操动机构,机械故障诊断,卡涩,频谱分析

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Abstract:

为了实现高压隔离开关机械故障诊断,基于霍尔效应和电阻应变测量技术实时检测了GW6H—252型隔离开关分合闸动作过程中的电机定子电流和操作轴扭转应变,推导并验证了电机电流与操动机构输出力矩的函数关系,分析了隔离开关传动机构卡涩、平衡弹簧失效、合闸不到位等机械故障情况下的电机电流信号特征,提出了基于电机电流检测的隔离开关卡涩故障诊断流程。研究结果表明:电机定子电流与操作力矩存在二次函数关系,当隔离开关发生机械故障时,驱动电机电流波形发生畸变,电流峰值增大,峰值出现时刻偏移,电流频谱中的边频成分增大。该方法具有广泛适用性,可有效检测高压隔离开关的机械故障,从而提高设备运行的可靠性。

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