摘要
发电机、变压器、电动机、电力电容等设备的绝缘电阻在实际工作中会受环境影响,绝缘电阻存在劣化现象,若绝缘电阻过低会导致对地电流增加,存在严重的漏电现象,为此需要定期离线利用摇表进行绝缘检测,为了实时了解投运前电机绝缘性能,设计一种新型高压电机绝缘电阻在线监测仪,该监测仪利用高压发生模块,结合高速采样电路,实现了高压电机绝缘电阻和吸收比的在线监测,经实际测试满足高压电机绝缘特性在线监测的要求。
The insulation resistance of generator,transformer,motor,power capacitor and other high-voltage equipment is affected by the environment in the actual work,and the insulation resistance is deteriorated.If the insulation resistance is too low,it will lead to the increase of ground current,and there is a serious leakage phenomenon.Therefore,it is necessary to regularly off-line use the megger for insulation detection.In order to understand the insulation performance of the motor before operation in real time,a design method is proposed A new type of on-line monitoring instrument for insulation resistance of high-voltage motor is introduced.The instrument uses high-voltage generator module and high-speed sampling circuit to realize on-line monitoring of insulation resistance and absorptivity of high-voltage motor.Through actual test,it meets the requirements of on-line monitoring of insulation characteristics of high-voltage motor,and has been put into use in No.3 pump room of Shanghai Hongqiao hub.
作者
毛美中
祝子玥
Mao Mei-zhong;Zhu Zi-yue
出处
《电力系统装备》
2021年第9期180-181,共2页
Electric Power System Equipment
关键词
高压电机
绝缘电阻
在线监测
吸收比
high voltage motor
insulation resistance
on line monitoring
absorptivity
