站用400 V交流系统馈线状态量研究

Research on feeder state quantity of station 400 V AC system

站用400 V交流系统作为变电站低压设备工作电源,是变电站运行的根本;电流从站用变输出后经,由专用站用变交流馈线屏实现全站低压负荷电源分接;交流馈线屏有母排、断路器和接线端子,缺少状态监测。文章分析交流馈线屏馈线支路物理状态量,总结交流系统绝缘故障,分析各状态量与绝缘故障关系,总结交流馈线状态量在交流系统中的应用。

As the working power supply of low-voltage equipment in substation,400 V AC system in substation is the basis of substation operation.After the output of substation transformer,there is a dedicated substation transformer AC feeder panel to realize the low-voltage load power distribution of the whole station.There are bus bars,circuit breakers and terminals in the AC feeder panel,which is lack of condition monitoring.This paper analyzes the physical state quantity of feeder branch of AC feeder panel,summarizes the insulation fault of AC system,analyzes the relationship between each state quantity and insulation fault,and summarizes the application of AC feeder state quantity in AC system.