电气在线绝缘监测系统在炼化企业的应用

Application of Electrical On-Line Insulation Monitoring System in Refinery Enterprises

电力系统及电气设备的故障大部分是由于绝缘的降低、损坏而引起的。判断绝缘状况最常用的方法是用兆欧表测量其绝缘电阻值,此种方法需在停电状态下进行。通过论述在线绝缘监测系统利用兆欧表检测的原理,将停电状态下的检测转变成在线、连续的检测,能及时发现电气设备绝缘变化情况,达到预防电气事故发生的目的。

The failures of power system and electrical equipment are mostly caused by the reduction and damage of insulation.The most common method of judging the insulation condition is to measure the insulation resistance values by megohmmeter,which should be carried out in the state of power failure.The principle of on-line insulation monitoring system which carries out detection by megohmmeter is discussed.The detection under power failure is transformed into on-line and continuous detection,which can find out the insulation change of electrical equipment in time,and then reach the purpose of preventing electrical accidents.