分布式电源并网对配电网保护的影响

Analysis and Countermeasures of the Influence of Distributed Generation Interconnection on Distribution Network Protection

利用DG的容量、位置、功率因数等指标,分析DG对配电网短路电流和继电保护的影响;将配电网分为传统配电网和用配电自动化系统升级后的配电网。基于DG对配电网短路电流和保护装置影响的研究,对分布式电源影响配电网保护的多种因素进行分析,提出了相应的解决方案。

The influence of DG on short-circuit current and relay protection of distribution network is analyzed by capacity,position and power factor of DG.The distribution network is divided into traditional distribution network distribution network and distribution automation system upgraded.Based on the research of DG’s influence on short-circuit current and current relay of distribution network,several solutions of distributed generation’s influence on distribution network protection are proposed.The influence of different capacities and locations of distributed generators on line current protection is analyzed,and the conclusion of sub-area influence on protection is drawn,and several measures to reduce the influence are given.