断路器断口闪络保护和断路器失灵保护整定计算

Breakage Flashover Protection and Failure Protection Setting Calculation for Circuit Breaker

目前,大型发电机变压器组220kV及以上并网断路器的断口闪络保护、大型发电机组故障时的断路器失灵保护普遍存在整定计算不合理的问题,多次导致保护拒动。文中提出较为合理的整定计算方法以及需要注意的一些问题。

Misoperation of breakage flashover protection of 220 kV or above circuit breaker for large generator-transformer set and breaker protection failure for large generator are generally caused by unreasonable setting calculations, which leads to false protecting actions many times. The more reasonable setting calculation method and several problems needed to notice in setting calculation are put forward.