27.5 kV电压互感器二次电压监测切换装置研究

Researches on Switching Devices for Secondary Voltage Monitoring of 27.5 kV Potential Transformer

为解决牵引变电所27.5 kV母线电压互感器故障或高低压熔断器熔断后电压互感器无自动切换问题,介绍牵引变电所27.5 kV电压互感器二次电压监测切换装置,自动投入备用电压互感器,同时将电压监测装置纳入综合自动化系统,并将电压互感器的切换信息通过远动系统传送至调度终端,为实现牵引变电所无人值守创造条件。

In order to solve the problems that there is no automatic switching of the potential transformers when 27.5 kV bus bar potential transformer is in faulty or high voltage/low voltage fuses are broken, the paper introduces the switching devices for secondary voltage monitoring of 27.5 kV potential transformer in traction substation, which will switch in the standby potential transformer automatically, incorporate the voltage monitoring devices into the integrated automation system at the same time, and transfer the switching information of the potential transformers into the remote terminal of the power dispatching system via remote control system channel, providing conditions for realizing of unmanned operation of traction substation.