含分布式电源的配电网故障特征研究

Research on Fault Characteristics of Distribution Network with Distributed Generation

介绍了不同类型的分布式电源在配电网发生故障时的特征,分析了线路不同位置发生短路故障时分布式电源接入配电网后对三段式电流保护所产生的不同影响,在PSCAD仿真软件上建立了等效的配电网模型,得出了引起保护拒动或误动的临界值,分析结果与仿真结果一致,为配电网保护的设计整定提供了依据。

Introduction was made to the features of different types of distributed generation when the faults of distribution network happened. This paper analyzed the different impacts of distributed generation accessing distribution network on three sections of current protection when the faults happened at different positions. The equivalent model of distribution network was established on PSCAD simulation software to obtain criti- cal value resulting in protection rejection and misoperation and the analysis result was consistent with simulation result, which provided basis for the design setting of distribution network protection.