基于电机电流特征量的隔离开关机械缺陷诊断方法研究  

Study on Mechanical Defect Diagnosis of Disconnector Based on characteristic of motor current

作　　者：李大卫[1] 张恩伟 徐党国[1] 孙云生 崔贺平[1] 

机构地区：[1]国网冀北电力有限公司电力科学研究院(华北电力科学研究院有限责任公司),北京100045 [2]国网冀北电力有限公司检修分公司,北京102488 [3]国网冀北电力有限公司,北京100053

出　　处：《华北电力技术》2016年第1期42-47,共6页North China Electric Power

摘　　要：通过理论推导和试验测试,研究了隔离开关分/合闸操作过程中电机电流与转轴转矩之间的对应关系。搭建试验平台,模拟隔离开关常见机械缺陷,对比分析不同缺陷情况下隔离开关电机电流与转轴转矩曲线的变化特征。通过提取电机电流信号关键特征量,提出基于电机电流特征量的隔离开关机械缺陷诊断判据和方法,为今后实现隔离开关机械状态在线监测及诊断预警等提供了理论基础,有助于进一步提升隔离开关状态检修水平和运行可靠性。In this paper, the relationship between motor current and rotating shaft torque of disconnector in opening/ closing process is studied through theoretical derivation and test. The characteristics of motor current and rotating shaft torque is analyzed by simulating common mechanical defect of disconnector on the test platform. The method of mechanical defect diagnosis is proposed by extracting key characteristics of motor current, which will help to enhance the level of disconnector state maintenance and operation reliability.

关 键 词：隔离开关 电机电流 机械状态 缺陷诊断 电机转矩 特征量 

分 类 号：TM84[电气工程—高电压与绝缘技术]