Analysis for the mal-function of protective devices (Re-closer) at the primary feeders with dispersed power sources

Recently, new dispersed power sources such as photovoltaic, wind power, fuel cell etc. are energetically interconnected and operated in the distribution systems, as one of the national projects for alternative energy. The technical guidelines on the interconnection of dispersed power sources have been established and conducted positively. However, protection devices (Re-closer) in primary feeder of distribution system interconnected with dispersed power sources like photovoltaic generation systems may cause problems of malfunction, and then many customers could have problems like an interruption. So, this paper presents the optimal method to minimize the impact of interruption, using Matlab/Simulink. And, also this paper shows the effectiveness of proposed method by simulating at the field distribution systems.