Energy Storage Control System Research Of Photovoltaic Based On DSP

As the main link of the combination of solar power generation technology and storage battery,Solar power generation system plays a key role in improving the utilization of renewable energy.At present,The overall development direction of photovoltaic power generation technology has changed from the previous generation number to the focus on power generation efficiency.In a photovoltaic system,the charge and discharge controller of photovoltaic is a crucial link.The basic function of the photovoltaic controller is to monitor the output current and voltage of the battery and the photovoltaic panel,and to stipulate the charging current and voltage of the battery terminals.For a long time,the main difficulty of photovoltaic power generation is the low efficiency of conversion and energy utilization,so this has become the main research direction.In this paper,we need to design a photovoltaic energy storage system.For the characteristics of photovoltaic charging and discharging system,the characteristic curves under different temperature and light intensity are analyzed to complete the maximum power point control of photovoltaic system.By comparing some general MPPT tracking algorithms,an improved variable step size perturbation observation method is proposed.At present,there are many charging methods for batteries.In this paper,through in-depth study of the charging theory and charging and discharging characteristics of batteries,and the analysis of various charging methods and their principles and processes,a new stage charging method with MPPT is proposed.The whole charging circuit is optimized to improve the battery life.Finally,the efficient energy transmission between photovoltaic cells and energy storage units is realized to ensure the stable operation of the microgrid.After building a photovoltaic energy storage platform in the laboratory,through debugging,it is verified that the three-stage charging mode with MPPT can significantly shorten the charging time of the battery,and the transition period between the two stages isrelatively stable.The output power of photovoltaic cells has also been significantly improved,which proves the feasibility of the system.