高压电网多端线路保护配置方案的探讨  

Discussion on the multi-terminal transmission line protection configuration in high-voltage power grid

作　　者：姚亮[1] 赖庆辉 林俊[1] 

机构地区：[1]国电南京自动化股份有限公司,江苏南京210003 [2]福建省德化县供电有限责任公司,福建德化362500

出　　处：《电力系统保护与控制》2010年第10期79-82,88,共5页Power System Protection and Control

摘　　要：在高压电网中多端输电线路的特殊性影响常规线路保护的设计与运行。分析常规线路保护用于多端线路时面临的问题。从通道配置选取和保护原理使用两个方面,研究多端线路的配置方案。比较单频率与双频率载波通道的纵联距离保护和环状与链状连接光纤通道的差动保护方案。推荐在条件允许的情况下优先考虑环状连接方式的差动保护。早期线路需改建为多端运行方式时,可以酌情采用双频率载波通道的纵联距离保护。The particularity of the multi-terminal transmission line affects the design and operation of line protection in the high-voltage（H V） power gri d.The paper analyzes the problem of g eneral protection facing when it applies to the multi-terminal line.It researches into the configuration of the multi-terminal line from channel scheme and protection principle.It compares the pilot distance protection with power line carrier（PLC） in the si ngle or double frequency and the differential protection with optical fiber in the loop or chain connection.It recommends that the differential protection with optical fiber in the loop connection is the preferential configuration as possible,adopts secondly the pilot distance protection with PLC in the double frequency only as the line is modified to the multi-terminal one.

关 键 词：高压电网 多端线路 纵联保护 载波通信 光纤通信 

分 类 号：TM773[电气工程—电力系统及自动化]