220kV线路后备保护增加“灵敏快速段”的方案探讨  

Discussion on celerity zone of 220 kV transmission line protection for sensitive zone

作　　者：李本瑜[1] 

机构地区：[1]云南电力调度中心,云南昆明650011

出　　处：《电力系统保护与控制》2009年第13期92-93,117,共3页Power System Protection and Control

摘　　要：纵联保护作为220kV线路全线速动的主保护,在线路正常运行时肩负着不可替代的作用,但由于纵联保护必须依赖于通讯通道,在通道中断或者传输质量降低时,都将造成纵联保护被迫停运。在线路的两套纵联保护均退出运行的情况下,为了满足系统稳定的要求,必须缩短后备保护灵敏段的动作延时,总结2008年年初电网在遭受罕见的冰雪凝冻灾害天气考验期间,纵联保护通道暴露出的一些问题以及相应的处理经验,提出了线路后备保护增加"灵敏快速段"的方案。Pilot protection is the master protection of 220kV transmission line,but the pilot protection has to depend on communicate channel,so when the communicate channel is break off, pilot protection has to be compelled. When the two pilot protections of 220kV transmission line protection are all resected,in order to satisfy power system stability,the back-up protection delay of time of transmission line must be shorten.This paper summarizes the experience that pilot protection channel suffered frozen weather in 2008 and brings forward the scheme of celecity zone of 220kV transmission line back-up protection.

关 键 词：纵联保护 通讯通道 后备保护 灵敏段 

分 类 号：TM773[电气工程—电力系统及自动化]