Multi-Source Renewable Energy Exchange Management System for Off-Grid Home Load

Green and ecological energy sources are nowadays promising power sources, effectively useful for electrifying regions sited far away from the electricity grid. In this context, the current work proposes an advanced energy management strategy in which an isolated domestic site could be fed by a multi-source site supply. The multi-source system includes a WT coupled to a PMSG permanent magnetic synchronous generator, a solar PV, a storage battery, a diesel generator as a power generation system, AC load, and dump load. Basically, the advanced management strategy rests on the idea of equating the wind turbine and photovoltaic generator provided energy and the domestic load required energy. To ensure the home-provided electrical energy autonomy, we consider implementing a special battery charge/discharge storage system, as well as a diesel generator used as a backup source, in case of a lack of renewable energy sources and minimal battery state of charge (SOC). In this context, our major aim consists mainly in boosting the studied system's energy management strategy (EMS), through ensuring constant frequent supply and maintaining it to meet the variable daily (24-hour) consumption. In order to prevent power losses, a dump load as an auxiliary load is used in case of excess renewable power. The efficiency of the advanced energy-management strategy was actually tested and verified under all possible operating conditions. The achieved results turn out to confirm the scheme's reliability in maintaining harmonious synchronization between energy production and consumption processes, in terms of system autonomy and power-loss minimization.