某厂房保护测控装置电压异常分析与处理措施

Analysis and Treatment of Voltage Anomaly of Protection Measuring and Controlling Device of an Actual Factory Building

电压互感器是电力系统中重要的电气设备,在测量线路电压、功率和保护及电机并网方面发挥着重要作用。在新建、改建电站投运过程中,由电压互感器二次接线错误引起的故障时有发生。分析了一起互感器接线方式变更造成电压显示异常的原因,最终采用有效的处理措施解决了问题。

Voltage transformer is important electrical equipment in power system,which plays pivotal role in the measurement of line voltage,power and protection and the connection of motors to the grid.Faults caused by secondary wiring errors of voltage transformers often occur during the operation of newly built and retrofitted power stations.This paper analyzes the cause of abnormal voltage display after changing transformer's connection mode,and reports the effective countermeasures adopted.