An Efficient Planning to Improve the Resiliency During HILF Events Using DG Sources in the Distribution System

The extreme events (e.g., hurricanes, earthquakes, and floods) and man-made attacks have caused huge losses in the power grid and in the developed countries where the reliable electrical power supply is essential, and such events have gathered the attention of the researchers to develop new techniques to reduce their impact. The effect of such high-impact, low-frequency (HILF) events is measured through resiliency index, and various control, operation methods and planning strategies are proposed to improve grid resilience, but have limited application. Indian power system is among one of the largest synchronized grids in the world with a unique geography and topology. Hence, Indian power system experiences a varying degree of diversity in terms of weather and climate and faces more than one high-impact, low-frequency (HILF) events every year having a significant loss in the Indian electrical grid. This paper discusses a unified resilience evaluation with optimal placement of distributed generation (DG) for different penetration level. The proposed method is tested for the 33-bus distribution system, and results reveal that the with multiple energy sources in the grid, the resiliency can be improved during HILF events.