220kV变电站220kV母线保护双重化改造实例分析

Example Analysis of Reformation of Duplex Bus Protection in 220kV Transformer Substation

目前我地市公司220k V母差保护双重化配置率仍较低,双重化改造的工作正有序展开,本文针对某220k V变电站的实际情况,介绍保护类型和工程内容,详细阐述第二套母差跳闸回路,失灵回路,远跳回路等设置,鉴于此变电站内设备回路的多样性和复杂性,给出不同的回路走线方法以使之达到功能完备,回路清晰。本文对类似220k V变电站的母差保护双重化改造工程极有参考价值。

At present in the city company, the coverage of double bus protection was much low, and the reformations of duplex bus differential protection were applied orderly. The paper introduced the protection types and content of construction, and expounded the details of trip circuit, breaker fail protection circuit and direct transfer trip circuit aiming at the 220 k V transformer substation. Owing to the diversity and complexity, the suitable circuits were designed for full-function and clear. The paper had much reference to the reformation of duplex bus differential protection.