浅析Vv型电压互感器二次接线方式

Preliminary Analysis on Secondary Wiring of Vv Mode Potential Transformer

本文分析了某水电厂2号机组单机运行时机端出现过电压,同时发电机出口机旁电压互感器B相高压熔断器熔断,造成发电机过电压保护拒动的原因,提出了Vv型电压互感器二次侧的测量表计和继电器新的二次接线方式。

This paper analyzes the reasons that generator overvoltage protection rejected to operate because over-voltage occurred at unit side when Unit 2 is in operation in a power station,at the same time,the B-phase high voltage fuse of generator potential transformer is broken at the generator outlet,presenting a new wiring for the meters and relays which are at the secondary side of Vv potential transformer.