Optimal Energy Management and Battery Sizing Method in Microgrid

Now electricity became the basic commodity to mankind. Demand for high quality and reliable electrical power supply is growing day by day. Due to increase in electrification for daily life purpose, surge in sensitive/critical load and since fossil fuels are exhausting there is an urgent requirement for increasing green energy production from renewable energy sources. Another important factor which contributes for revolutionary development in microgrid (MG) is the behind recent blackouts and lack of power supply to critical loads at the time of blackout. But in implementing MG there are few challenges and problems to be addressed. One of the important challenges is energy management in MG. Optimal allocation of generation to sources including economic load dispatch with unit commitment involving continuously varying generation is a challenge. Owing to the intermittency in power generation, allocating generation to each source within limits makes the problem a multi objective optimization. To maintain the stability, power and frequency balance using battery energy-storage systems (BES) is necessary in microgrid. While including BES in MG, sizing of BEs is also an important parameter since deficient capacity makes the system unstable whereas excess capacity increases the operating cost. This paper includes optimal energy management with battery sizing in microgrid.