摘要
Abstract
In a nuclear power plant,between the generator terminal and the step-up transformer,generator circuit breakers are installed,and generator circuit breaker failure protection is also installed.This paper analyzes the protections and the value settings of the nuclear power plant generator,and points out the problems in the generator circuit breaker failure protection design.First,in the protection of some j ump starter generator circuit breakers,de-excitation,and the main valve closing,as the current criteria are not satisfied,the starter generator circuit breaker failure protection cannot be directly activated. Secondly,during the turbo-generator program tripping process,the generator circuit breakers break down and cannot trip, neither can the generator circuit breaker failure protection be activated.Based on the harm caused by these problems,this paper proposes some improvements on the nuclear power plant generator breaker failure protection design,further improving the generator circuit breaker failure protection design in the nuclear power plant.关键词
核电厂/发电机出口断路器/断路器失灵保护/程序跳闸Key words
nuclear power plant/generator circuit breaker/circuit breaker failure protection/program tripping
