摘要
为有效解决母线短路电流超限问题,介绍了一种通过调整系统运行方式使500 k V线路出串运行的方法。分析了运行方式的变化对保护及安控装置带来的影响,指出在相邻线路三跳的情况下,安控装置由于逻辑判据不满足而存在拒动的风险。提出了将出串运行的两条线路看做一个整体,通过加装断路器保护三相出口重动继电器,并将其重动接点三相串接作为相邻线路保护远跳开入,使相邻线路对侧跳闸的方式来满足安控装置逻辑判据的要求。现场试验结果表明,该方法实现方式简单,可操作性强,证明了方法的有效性及正确性。
To limit system bus short-circuit current, a method of 500 k V line out-series by adjusting the system operation mode is introduced. And the impact of protection and safety operation control device is analyzed after the change of operation mode. This paper points out that under the condition of line three phase trip, there are risks of safety control unit refusing action, caused by the logical criterion unsatisfied. An implementation method regarding two adjacent lines as a whole, by adding three phase output reinitiated relay in breaker protection, and taking their recombinant contacts as the adjacent line protection distant-trip input, to meet the logical criterion of safety system control device, is proposed. Field test results show that this method is simple and workable, and its validity and accuracy has been proved.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2017年第4期150-154,共5页
Power System Protection and Control
关键词
出串运行
安控装置
重动继电器
远跳
out-series operation
safety control device
reinitiated relay
distant-trip
