摘要
本文应用双口网络理论处理复故障的方法,分析了被保护线路的各类故障及对侧开关跳闸时保护安装处电量的变化情况,并对典型系统参数作了分析计算,提出了微机全线相继速动距离保护的实施方案。该方案对提高灵敏度以及防止误动是有利的。动模实验也表明,该方案部分地取代昂贵的高频保护,解决通道拥挤问题是可能的。
Analysis of a scheme of accelerated trip for faults in the second zone of a transmission line distance protection is given in this paper. By the use of the two-port network theory, veriation of the sequence currents and voltages are analyzed when the fault occurs on the protected line followed by a trip of the circuit breaker on the other side. The analysis is supported by tests performed on a laboratory model of a power system with two sources. The new scheme can improve sensitivity and avoid ma1-operation. Thus, it may be possible to use this scheme instead of pilot protection and alleviate any problems caused by the non-availability of a sufficient number of communication channels for remote control and relaying.
出处
《中国电机工程学报》
EI
CSCD
北大核心
1991年第S1期60-69,共10页
Proceedings of the CSEE
