Simplified feed-forward control of the maximum power point in PV installations

A novel simplified control strategy, based on the positive feedback of a maximum power point tracking (MPPT) converter output current, is introduced. Cost-effective MPPT reduces the energy cost from renewable energy generators by optimizing the utilization of the renewable energy source. MPPT for relative small photovoltaic (PV) systems, with battery back-up, is achieved by maximization of the output current to the battery by employing this simplified positive feedback control strategy. This strategy was tested by using a buck converter topology. Experimental verification of the operation of this controller is included. This controller can be utilized in small (one or two panel) as well as larger installations, so that the total MPPT converter cost may be a fraction of the solar panel cost