Operation of Multiple PV Arrays and BES Based Standalone Microgrid with Reactive Power Sharing Between VSCs

An operation of a three-phase distributed energy source based isolated microgrid is presented in this work. Here solar photovoltaic (PV) is considered the primary energy source. A battery energy storage (BES) is used as an energy storage unit to improve the inertia of the system. The operation of the microgrid is studied during varying solar insolation and load unbalancing. The voltage source converter (VSC) attached to the BES maintains the voltage and frequency at the point of common coupling (PCC). It also supplies the non-fundamental apparent power demand of the load. The VSCs connected to the PV module inject the total active power generated to the PCC. The net fundamental reactive power demand of the load is shared equally between the VSCs.