摘要
越来越多的分布式电源(DG)接入配电网,这将影响系统原有的保护配置。本文首先介绍了未接入DG前配电网保护配置情况,并详细分析了DG的接入对配电网原有电流保护的影响。然后利用PSCAD/EMTDC搭建了实际配电网、分布式电源和电流保护模型,通过对DG不同接入位置和接入容量下的仿真分析,验证DG对原有电流保护的影响,为DG接入配电网保护配置方案的改进提供参考。仿真结果表明:DG容量越大对配网电流保护的影响越大,DG接入点越靠近馈线末端对本馈线电流保护的影响程度越大。
More and more distributed generations（DG） are being introduced into distribution system,which will have impact on the traditional protection.In this paper,the configuration of relay protection in distribution system before DG connecting to the system is discussed,and the impact of DG on the traditional current protection is analyzed firstly.Then,the models of practical network system,DG and current protection are built by using of PSCAD/EMTDC,and the influence of DG on current protection is verified through the simulation and analysis of different installed capacities and locations,which provide references for the improvement of feasible protection method in distribution system.The simulation results show that the greater the capacity of DG is,the greater its impact on traditional current protection is,and the nearer the access point of DG to the end of feeder is,the bigger its impact on current protection is.
出处
《现代电力》
北大核心
2012年第6期7-10,共4页
Modern Electric Power
