中国电机工程学报2012，Vol.32Issue(19)：125-133,9.
继电保护振荡闭锁的改进措施
Improvement in Power Swing Blocking of Line Protection
柳焕章 1周泽昕 2周春霞 2杜丁香 2王兴国2
作者信息
- 1. 华中电网有限公司,湖北省武汉市430077
- 2. 中国电力科学研究院,北京市海淀区100192
- 折叠
摘要
Abstract
Power swing blocking of transmission line protection is important section for power system safety, so properly design of it is a challenging job for entire protection. This paper improved the power swing blocking scheme in following aspects including modifying starting component, computing short-time open time in real time, presenting asymmetrical open and symmetrical open criterion in power swing blocking. A fault detector and startup accelerator were proposed to improve the performance of fault component start relay and zero sequence component start relay. Static stability current was replaced by Ulcosφ1 and fixed delay time was replaced by short-time open time computed in real time. An accelerate Soft Switch was used to improve open time of distance protection zone 1, UlCOSφ1 was computed by time delay of distance protection zone 2 or 3. Fault and swing characteristics were analyzed in m-｜ U1COSφ1｜ ordinate and new asymmetrical open criterion was proposed. The real-time digital simulator （RTDS） based simulation of 1000kV transmission line was simulated and simulation results conform to that of theoretical analysis.关键词
振荡闭锁/启动继电器/短时开放/对称开放/不/对称开放/加速软开关Key words
power swing blocking/start relay/short-timeopen time/symmetrical open/asymmetrical open/acceleratedsoft switch分类
信息技术与安全科学引用本文复制引用
柳焕章,周泽昕,周春霞,杜丁香,王兴国..继电保护振荡闭锁的改进措施[J].中国电机工程学报,2012,32(19):125-133,9.
