基于同步授时的广域电容型设备的绝缘缺陷监测

Insulation Defect Monitoring of Wide Area Capacitive Equipment Based on Synchronous Timing

为了及时获悉运行中的电容型设备的绝缘状态,提高变电站的运行可靠性,以相对介质损耗测试作为对容性设备绝缘性能判断的重要参考,构建了实时带电在线监测系统,大大提高了检测效率。通过在同一电力系统下各变电站内、处在相同电压等级、相同频率以及相同相别母线的容性设备设置无线监测单元,构建监测系统,采集环路电流数据,实时计算相对介质损耗因数,并利用多设备标识信息,通过相互比较,从多设备中定位绝缘缺陷设备,实现了容性设备的绝缘缺陷在线监测。案例显示,该方法具有良好的监测效果。

For obtaining the insulation status of capacitive equipment in operation in time and improving operation reliability of substation,a real-time live on-line monitoring system is constructed with the relative dielectric loss test as the important reference of the insulation performance judgement of capacitive equipment,which improves greatly the detection efficiency.The monitoring system is set up by way of setting wireless monitoring units at the same voltage class,frequency and phase busbar under the various substations of the same power system so to collect the loop current data and calculate real time the relative dielectric loss.Moreover,the identification information of multiple capacitive devices is used to locate the equipment with insulation defect from the equipment by comparison each other.The on-line monitoring of insulation defect of the capacitive equipment is achieved.The application case shows that this system has good monitoring effect.