DG接入配电网的通信式自适应电流保护研究

Research on communication-based self-adaptive current protection for distribution network with distributed generation

分析了分布式电源(DG)并入配电网后,传统的接线结构由单电源供电网络变为了多电源供电网络,改变了系统的潮流分布,继而配电网继电保护出现不协调的问题。针对DG并网后带来的误动、拒动和灵敏度降低等一系列问题,提出了一种通信式自适应电流保护方法,采用GOOSE over UDP实现信息传输并和自适应电流整定方法相结合,解决了DG接入配电网带来的问题。

The power flow in distribution network can be changed by the connection of DG, the current is no longer single direction. Aiming at the problems such as malfunction, refusal and sensitivity of detrimental effects on the distribution system of DG, the method of a communication - based self - adaptive current protection is proposed. Using the combination of GOOSE over UDP with adaptive setting of current protection, this protection solves those problems of detrimental effects on the distribution system of DG.