广东电力Issue(6)：26-30,5.DOI:10.3969/j.issn.1007-290X.2014.06.006
含分布式电源的配电网自适应电流保护
Self-adaptive Current Protection of Distribution Network Containing Distributed Generation
摘要
Abstract
Aiming at impact on protection system of distributed generation connecting with distribution network,this paper proposes a kind of new method for self-adaptive current protection.Firstly,according to operational way and topology struc-ture of distribution network system,it carries on equivalent conversion for DG network at back side of the protection device and gets its Thevenin equivalent model.Then,when happening short circuit fault and detecting short circuit current of the protection device is greater than the setting value,it firstly startup components of the protection device and then sends out short circuit power direction signals to neighbour protection device at fault side.Meanwhile,it receives short circuit power direction signals at the offside and uses method combining self-adaptive current setting value and communication technology to compare whether short circuit power direction signals of the protection device and its neighbour protection device are same or not in order to decide action.This scheme is feasible to solve problems of serious impact on selectivity,sensitivity, reliability and protection range of feeder current protection of the original distribution network after connecting DG.In ad-dition,it is able to protect the overall lines and improve safety and reliability.关键词
分布式电源/自适应保护/等值变换/通信技术Key words
distributed generation/self-adaptive protection/equivalent conversion/communication technology分类
信息技术与安全科学引用本文复制引用
唐金凤,聂一雄,武小梅,林伟..含分布式电源的配电网自适应电流保护[J].广东电力,2014,(6):26-30,5.基金项目
广东省绿色能源技术重点实验室资助项目(2008A060301002) （2008A060301002）
广东电网公司2012年科技项目(K-GD2012-218) （K-GD2012-218）
