摘要
本文针对110kV环网运行方式下线路发生故障,线路保护因装置故障、原理失配、整定错误等原因拒动引起主变后备保护无选择性越级跳闸从而导致全站失压的问题,提出一种基于母联功率方向的环网快速解列方法,在主变保护动作1时限跳母联的同时,识别故障线路所属母线,并跳开相应母线上合环运行的线路断路器,防止全站失压,缩小停电范围。仿真结果表明,若不考虑环网两条线路保护同时拒动,则本文提出的环网快速解列方法适用于110kV环网运行方式下线路任意位置的任意类型故障。
When the operation of the 110kV ring network fails and the line protection is refused due to the failure of the device,the mismatch of the principle and the setting error,the main transformer backup protection may have no selective skip trip,resulting in total station voltage loss.To solve this problem,this paper proposes a fast method of ring network splitting based on the power direction of bus coupler.At the same time as the 1 time jumper of the main transformer protection action,the bus bar of the fault line is identified and the circuit breaker running on the corresponding loop of the bus bar is skid to prevent the whole station from losing voltage and reducing the power outage range.The simulation results show that the method proposed in this paper is suitable for any type of fault in any position of the 110kV loop network if not consider the protection of two lines in the ring network refuse at the same time.
作者
陈晓彬
孙旭
陆金凤
谈浩
戴光武
Chen Xiaobin;Sun Xu;Lu Jinfeng;Tan Hao;Dai Guangwu(Jieyang Power Supply Bureau of Guangdong Power Grid Corporation,Jieyang,Guangdong 522000;NR Electric Co.,Ltd,Nanjing 211100)
出处
《电气技术》
2019年第1期63-67,共5页
Electrical Engineering
基金
广东电网有限责任公司科技项目(035200KK52160008)
关键词
故障环网
快速解列
线路拒动
母联功率方向
ring network
fast disconnection
protection failure
power direction of bus coupler
