电厂侧220kV母线保护双重化改造相关问题研究

Research on the Issues Related to the Reformation of 220 kV Duplex Bus Protection in Power Plant

母线保护涉及到电厂的出线、进线、母联等众多回路,母线保护一旦动作,将跳开与之相连的所有断路器,因此母线保护在电厂中具有一定的重要性和特殊性。这一特点决定了220 kV出线电厂侧母线保护双重化改造工程是一项技术难度高、设计任务繁重的工程。针对220 kV出线电厂侧母线保护双重化改造工程,介绍了新型母线保护装置特性,新型母线保护的总体改造方案,新型母线保护的相关问题与相关回路的分析,并结合工程实践经验对新型母线保护改造设计工作中的难点问题进行总结。

Bus protection involves many circuits such as outgoing lines,incoming lines,and bus connection of the power plant.Once the bus protection is activated,all circuit breakers connected to it will be tripped.Therefore,bus protection has certain importance and particularity in the power plant.This characteristic determines the reformation project of duplex bus protection in 220 kV outgoing line power plant a high technical difficulty,heavy engineering design task.In this paper,based on the reformation project of duplex bus protection in 220 kV outgoing line power plant,the characteristics of the new bus protection device are introduced,the overall reformation project of the new bus protection is illustrated,the related issues and the related loops are analysised,and finally base on the experience of the project,Difficult problems of the designing about the reformation of duplex bus protection is summaried.