摘要
主要分析了电力系统输电线路非全相运行对线路保护装置中距离判据的影响。通过大量的分析得出,在非全相运行时,相间方向阻抗继电器和接地方向阻抗继电器有可能误动作,若系统振荡将加大误动的几率。对各种距离继电器在非全相状态下的动作特性进行了详细的推导及分析,最后得出了实用的非全相距离保护的实现方法。
The effect of open- phase running of transmission line on distance criterion is analyzed. Then, the results are obtained through enough researches that phase- to- phase impedance relay and earth fault impedance relay may operate improperly in openphase rtmning state. The probability of misoperation can increase during power system oscillation. Then the practical method of distance relay in open- phase running state is proposed after the detailed derivation and analysis on its characteristics.
出处
《四川电力技术》
2008年第1期14-19,共6页
Sichuan Electric Power Technology
关键词
继电保护
非全相运行
距离保护
阻抗继电器
protective relaying
open- phase rurming
distance relay
impedance relay
