Solar PV Based DC Microgrid under Partial Shading Condition with Battery-Part 2: Energy Management System

The implementation of power electronics converter control with global maximum power point tracking (GMPPT) algorithm is used to extract the optimal power from solar photovoltaic array under partial shading conditions (PSCs). The isolated dc microgrid is used to improve the reliability and power quality to the end users. The bidirectional converter is used to regulate the isolated dc bus voltage and maintain the power balance between PV power generation and load power demand for surplus and deficit power conditions by charging and discharging of the battery. The different modes of operations are discussed and different controller design aspects are proposed to balance the load power requirement with respect to the availability of source power and state of charge (SOC) of the battery. The power converter losses are also considered for accurate analysis of power balance. The effectiveness of presented power control method with battery energy storage system (BESS) is demonstrated using MATLAB simulation software.