特高压交流半波长输电线路保护体系  

UHV AC Half-Wavelength Transmission Line Protection Scheme

作　　者：周泽昕[1] 王兴国[1] 柳焕章 郭雅蓉 杜丁香[1] 

机构地区：[1]电网安全与节能国家重点实验室(中国电力科学研究院),北京市海淀区100192 [2]国网公司华中分部,湖北省武汉市430077

出　　处：《电网技术》2017年第10期3174-3179,共6页Power System Technology

摘　　要：特高压半波长线路输电距离长,电磁波及数据传输延时长,故障电气特征呈现非线性、非单调等特点,现有特高压保护原理及动作性能无法满足半波长线路需要。文章根据特高压半波长输电线路的时空特征,综合利用单端量保护和闭锁式、允许式、测距式等双端量保护,构建了半波长线路继电保护方案,克服了半波长线路电磁波及数据传输延时对保护速动性的影响,动作速度完全满足现行特高压线路对保护动作时间的要求,实现了半波长线路全线故障的快速切除。Length of UHV AC half-wavelength transmission line is much longer than normal transmission lines. Electromagnetic wave propagation time and channel delay is also longer after fault. Its fault electric characteristics are nonlinear and non-monotonic. Traditional protection theory and action performance cannot meet its requirements. UHV AC half-wavelength transmission line protection scheme is proposed in this paper. The scheme, using spatial-temporal characteristics of the line, consists of one-terminal transient protection and two-terminal transient protection, including blocking type, ranging type and permissive type protections. It eliminates impacts caused by electromagnetic wave propagation time and channel delay. Its action speed meets the standard of UHV transmission line protection. With this scheme, the fault of UHV AC half-wavelength transmission line can be cleared quickly.

关 键 词：特高压半波长输电线路 自由波能量保护 假同步保护 闭锁式保护 允许式保护 测距式保护 保护配置 

分 类 号：TM77[电气工程—电力系统及自动化]