Renewable hybrid system with battery storage for safe loads supply

This paper presents a renewable hybrid system with battery storage which can work as a stand-alone and/or grid-connected mode. It consists in a wind turbine with permanent magnet synchronous generator (PMSG) and a photovoltaic panel forming a single-phase micro-grid. The wind generator and photovoltaic module are connected to the micro-grid via single-phase converters. Maximum power point tracker (MPPT) techniques are used to control the hybrid system. The common dc bus collects the total energy from the wind and photovoltaic subsystems and uses to supply the loads via a single phase inverter and to charge the battery bank sometime with the energy in excess. The important issue of this study is to ensure the safe energy supply of the ac loads during transient load and variable wind speed/irradiation conditions. Simulations are accomplished in order to validate the stability of the supply.