A New Method of Unintentional Islanding detection for Multiple Distributed energy resources based Power System

Distributed generation (DG) is being integrated into power systems worldwide to reduce fossil fuel consumption and avoid the expense of transmission lines. In addition to the aforementioned benefits, it also poses issues for protection co-ordination, power quality, and the establishment of an islanding condition that must be resolved for proper operation and seamless transition of mictrogrid in islanding mode to perserve reliability. Islanding is an unwanted state that can pose safety risks to utility workers, power system equipments, and customer devices. In this paper, severe consequences of unintentional islanding are discussed and a ROCOF based method for islanding detection for multiple energy resources based system is proposed. Simulation results considering different normal and islanding cases are exhibited, which proves fast detection with effectiveness and accuracy of the proposed method.