母线保护国网标准解析

Analysis on Standardization Design Specification for Busbar Protection

分析了国家电网公司发布的《Q/GDW 175-2008变压器、高压并联电抗器和母线保护及辅助装置标准化设计规范》,解析了标准化设计规范中更新的母线保护装置相关规范,例如失灵保护电流判别原则和使用范围、主变开关失灵时母线保护和主变保护联跳处理的规范原则、充电到死区保护的提出原因和实现要点、充电保护和母线保护之间的配合、母线保护中母线联络开关动作闭锁原则、母线保护中直跳开入动作防误原则等,为理解母线保护及辅助装置的标准化设计规范提供参考。

Q/GDW 175-2008 standardization design specification for power transformer,high voltage shunt reactor,busbar protection and auxiliary equipments published by State Grid is analyzed in this paper,and the new standardization of busbar protection is also explained.The standardizations analyzed in detail are the judgment criteria of current and protection region for failure protection,the specification of busbar protection when breaker works incorrectly and the combined action of main transformer protection,the reason for the protection design of charging to dead zone protection,the cooperation between charging protection and busbar protection,the action locking criteria of tie switches in busbar protection,and the anti-misoperation criteria of direct action breakers in busbar protection.The analysis is helpful for understanding the standardization design specification for busbar protection and auxiliary devices.