含分布式电源的配电网保护方案研究

Research on Protection Scheme of Distribution Network with Distributed Generation

分布式电源的接入使配电网中各支路的电流流向及大小发生变化,对传统电流保护造成很大影响,使得原有保护误动或灵敏性降低,分析了分布式电源对配电网的影响,归纳了目前含分布式电源配电网的几种保护方案,认为未来含分布式电源的配电网保护应该是传统的基础保护和基于通信机制的多点信息保护的融合。

The changes in current flow and magnitude of each branch in distribution network may occur due to distributed generation integration,and have a great influence on traditional current protection,resulting in the original protection malfunction and sensitivity decrease.The paper analyzes the influence of distributed generation on the distribution network,generalizes several protection schemes of the distribution network with DG at present,and points out that the future protection scheme for the distribution network with distributed generation should be the integration of traditional protection and multi-point information protection based on communication mechanism.