Voltage Control of Stand-Alone PV-Battery Generation System

In this paper, a strategy of control for a stand-alone operation of a distributed generation (DG) unit, consisting photovoltaic (PV) array and battery storage, is presented. A three-phase balanced load supplied by the distributed generation system using a voltage-sourced inverter (VSI). With two DC-DC converters, the PV array and the battery are connected to a DC link of the VSI. The whole system is divided into two sides, the DC side and the AC side which each side has an independent control system. The control system of the DC side consists of a master controller and two control subsystems for each DC-DC converter. The load flow from the sources to the load is managed through the master controller. AC voltage of the load is regulated by the AC side controller. Simulation results using Simulink/MATLAB confirm that the performance of the suggested control system is entirely satisfactory under various operational scenarios.