电网技术Issue(6)：1645-1650,6.
含分布式电源配电网的故障定位新方案
A New Fault Location Scheme for Distribution System With Distributed Generations
孙景钌 1陈荣柱 1蔡轼 1李琦 1赵璞 1董丹煌1
作者信息
- 1. 温州电力局，浙江省 温州市 325000
- 折叠
摘要
Abstract
Connecting distributed generation (DG) to distribution network makes the radial structure of distribution network changed and as a result traditional non-directional current protection is affected. Since potential transformers (PT) are not installed to the feeders of distribution network in general, the voltage message cannot be obtained. A new fault location scheme that does not resort to voltage message is proposed, in which the faulty position can be accurately located by means of analyzing action message of time-limited instantaneous current protection configured to the upstream zone of DG and that of definite time over-current protection configured to the downstream zone of DG. Meanwhile, several special circumstances, such as multi-DG are connected with distribution network via different connection points and the sensitivities of protections cannot meet the requirements, are discussed and corresponding solutions are given. For the proposed fault location method it is not needed to install lots of extra PT and circuit breakers to distribution lines, and protective relayings are not affected by output variation of DG, thus original settings of protection relays can be retained and the proposed scheme is practicable. The correctness of the proposed protection scheme is verified by simulation results of a certain 10kV distribution network.关键词
分布式电源/配电网/限时电流速断保护/故障定位Key words
distributed generation (DG)/distribution network/time-limited instantaneous current protection/fault location分类
信息技术与安全科学引用本文复制引用
孙景钌,陈荣柱,蔡轼,李琦,赵璞,董丹煌..含分布式电源配电网的故障定位新方案[J].电网技术,2013,(6):1645-1650,6.
