BUS-1000母差保护在220kV变电站的应用

Application of BUS-1000 Differential Busbar Protection in 220 kV Substation

BUS-1000母差保护是一款高速比率制动、高灵敏的中阻抗型母线差动保护，大多应用于220kV变电站。通过解读GE公司BUS-1000母线差动保护技术说明书，结合220kV春申变电站的维护操作实践，介绍了BUS-1000母差保护的优点、保护配置以及动作原理，分析了执行回路与老式母差的不同点，尤其是剖析了三种特殊故障点的动作原因、运行注意点及改进建议。通过解读技术要点，掌控母差保护，了解元件功能、熟悉保护原理和交流运行维护体会，用以提升变电站的安全和运行管理水平。

BUS-1000 differential busbar protection is a high speed ratio brake, high sensitive medium hnpedance differential busbar protection, mostly used in 220 kV substation. Through the interpretation of GE company＇s BUS-1000 differential busbar protection technical instructions, combined with the maintenance practice of 220 kV Chunshen Substation, introduces the advantages, protection configuration and the action principle of BUS- 1000 differential busbar protection, analysis of the difference between execution circuit and old differential busbar, especially analyze the action, operation points and suggest improvement for three special fault point. Through interpretation of technical key points, we can control of the differential busbar protection, also understanding the function of element, familiar with protection principle and communicate operation and maintenance experience to raise the safety operation and management level of substation.