广北甲、乙线紧急停运二次回路设计方案的探讨  

Discussion on Design Proposal of Secondary Circuit for ESOF on Lines A and B in North Guangdong

作　　者：徐强超[1] 

机构地区：[1]广东电网公司广州供电局,广东广州510620

出　　处：《广东电力》2011年第4期54-58,共5页Guangdong Electric Power

摘　　要：介绍和分析了±500kV天生桥-广州直流输电系统广北甲、乙线紧急停运(emergency switch off,ESOF)的逻辑控制策略和二次回路的原设计方案;考虑到电力系统不同运行方式下对跳闸策略的影响,提出了对交流侧的远传发信回路以及其跳闸回路设计进行改造——增加跳闸继电器KCF接点及跳闸接触器Q1及Q2接点并联的方案,大大提高了直流输电系统的安全可靠性。The paper introduces and analyzes logic control strategy and original design proposal of secondary circuit for emergency switch off（ESOF） on lines A and B of ±500 kV Tianshengqiao-Guangzhou DC transmission system.It considers impact of various operation modes of power system on tripping strategy and brings forward reconstruction on design of remote messaging circuit at AC side and tripping circuit by adding KCF contracts of tripping relay and parallel connection between contracts Q1 and Q2 of tripping contactor,which greatly promotes safety and reliability of DC transmission system.

关 键 词：直流输电系统 紧急停运 减功率 跳闸继电器 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM77