摘要
通过大量的电磁暂态仿真研究,寻找出一些特高压输电暂态过程的特点,在此基础上探讨一些对继电保护来说需要注意的问题。研究结果表明,现有的用于500kV的各种继电保护技术,需要做出一些改进,才能适应特高压系统的要求。改进的前提是对特高压系统的特性,特别是对其暂态特性的规律性的深入研究。该文在这几个方面作了初步研究。
Based on electric-magnetic transient digital simulation and analysis, some special characteristics about dynamic processes of fault on UHV transmission line are given in this paper. The difference of fault transient between 1000kV and 500kV transmission line are listed and analyzed in detail. Decaying DC component, high frequency component and self-excitation oscillation after external fault cleared are primary problems which protective relaying should be faced. The improvement suggestions of application of protective relaying in UHV transmission line are proposed as well.
出处
《继电器》
CSCD
北大核心
2007年第5期1-3,共3页
Relay
基金
国家自然科学基金资助项目(50507005)~~
关键词
特高压输电
继电保护
电磁暂态
UHV
protective relaying
electric-magnetic transient
