摘要
含分布式发电的配电网混供线路对10kV馈线保护线路重合闸产生了重大影响。现有变电站10kV馈线开关柜无线路电压抽取装置,重合闸无法实现检无压或检同期功能,直接重合将对分布式发电的发电机组造成较大的冲击,甚至扩大故障范围。本文以小水电站混供线路为例,通过研究一种能够适用于10kV开关柜的小型线路电压采集判断装置,提供重合闸检线路无压的电压依据,实现可靠快速复电,保障供电可靠性。
The mixed supply lines with distributed generation have a great influence on the reclosing of distribution network.There is no line voltage extraction device in the 10kV feeder switch cabinet of the existing substation,and reclosing can not realize the function of no voltage detection or synchronous detection.Direct reclosing will cause great impact on the distributed generation units,and even expand the fault range.Taking the small hydropower station as an example,this paper studies a small line voltage transformer which can be installed in the switch cabinet to provide the voltage basis for reclosing and checking the line without voltage,so as to realize reliable and rapid power recovery and ensure the reliability of power supply.
作者
徐兴发
刘泽华
Xu Xingfa;Liu Zehua(Shaoguan Power Supply Bureau,Guangdong Power Grid Corporation,Shaoguan,Guangdong 512026)
出处
《电气技术》
2020年第7期97-102,共6页
Electrical Engineering
基金
广东电网有限责任公司职工技术创新项目(030200KK52190003)。
关键词
小水电
电压互感器
电阻分压
检无压重合闸
small hydropower stations
potential transformer
resistance voltage divider
voltagefree detect reclosing
