断路器操动机构音频在线监测方法的可行性研究

Feasibility Study on Audio On-line Monitoring Method of Circuit Breaker Operating Mechanism

在断路器操动机构内安装声压传感器、振动加速计等装置,提取断路器动作时的信号波形,利用专用软件获取断路器在不同状态下声学、振动波形特征和变化规律。总结操动机构异常状态时的波形特征,验证了对断路器操动机构运行状态进行在线监测的可行性。随着试验次数和使用年限的增加,断路器操动机构产生零件磨损、紧固件松动、传动件润滑油减少等缺陷的概率增加,须采集大量试验数据,总结出音频波形与故障件之间关联性的规律。当数据积累到一定程度,可在“音频在线监测”的基础上,建立“音频在线监测与预警”系统,实时反应断路器运行状态,预知故障发生概率,对设备和电网安全具有较大意义。

By installing sound pressure sensor, vibration accelerometer and other devices in the operating mechanism of the circuit breaker, the signal waveform during the action of the circuit breaker is extracted, and then the acoustic and vibration waveform characteristics and variation rules of the circuit breaker under different states are obtained by using special software. The waveform characteristics corresponding to the abnormal state of the operating mechanism are summarized,and the feasibility of on-line monitoring the operating state of the operating mechanism of the circuit breaker is verified.