摘要
阐述了在目前运行的变电站中,有部分110 kV、35 kV农网变电站一次系统运行方式为负相序,随之二次系统也在负相序状态下运行。根据负相序是否影响保护装置的正常工作,从主变差动保护、复合电压闭锁过流保护、零序方向保护、距离保护、过流保护五个方面分析了负相序对保护装置的影响,并提出了改进建议。
In the presently operating substations, the primary system of some 110 kV and 35 kV rural substations runs in negative sequence; consequently, their secondary system runs in negative sequence, too. This article analyzes the effect of negative sequence on the protection device and proposes its improvement suggestions, according to whether negative sequence prevents the normal function of the protection device, from the five aspects of differential protection of main transformer, compound voltage overcurrent latch-up protection, zero-sequence directional protection, distance protection and overcurrent protection.
出处
《山西电力》
2013年第1期31-33,共3页
Shanxi Electric Power
关键词
变电站
一次系统
负相序
保护装置
substation
primary system
negative sequence
protection device
