Energy Optimization Control of Independent Photovoltaic Lighting Systems

With the daily worsening of global energy crisis and environmental pollution, characteristics of the non-pollution, non-noise and non-raw material except the sun of photovoltaic generation make it a promising green energy. This paper proposes a strategy of photovoltaic lighting system with energy management and control, which includes maximum power point tracking sub-battery charge control and battery discharge control. In the course of charge, controller chooses the right way of charge according to the battery terminal voltage; in the course of discharge, controller chooses the right discharge method according to the case of the battery SOC. Experiment shows that strategy of energy management and control improves the efficiency of the battery charge, extends the storage life of the battery.