Research On Unit Design And Optimization Of Photovoltaic Energy Storage Power Station

Solar energy has been widely concerned due to its large total,sustainable,wide distribution,safety and environmental protection.The use of photovoltaic volts to generate solar photovoltaic power generation is the most important form of development and utilization of solar energy,improving the output power of photovoltaic power generation systems.The design optimization of photovoltaic energy storage power stations is a hot research topic in the field of photovoltaic power generation.In this paper,the maximum output power of photovoltaic power generation system is optimized.The optimization of photovoltaic power storage unit is carried out from two aspects: PV module structure and Maximum Power Point Tracking(MPPT)algorithm.In this paper,the structure of photovoltaic energy storage power station unit is designed,the working principle of each component is analyzed,and the output characteristics of photovoltaic cells under standard test conditions(STC)are simulated and analyzed.Research,designing its working mode and control process based on energy demand.On the basis of satisfying the basic performance,considering the influence of factors such as cost,environment and use conditions,the parameters matching design of each component of the photovoltaic energy storage power station unit is carried out.According to the energy demand of photovoltaic energy storage power station unit,the output power,component parameters and energy storage battery pack parameters are reasonably designed to provide theoretical basis and data support for the optimization of photovoltaic energy storage power station units.According to the environmental conditions and geographical location of the PV energy storage power station unit,taking into account the uniformity of the annual power generation and illumination intensity of the photovoltaic power generation system,the maximum amount of radiation and the cumulative deviation of the monthly radiation amount are obtained for the inclined surface of the PV module.The function,based on the inclination of the PV module,establishes an optimal tilt angle optimization model for the PV module.Taking the Qingdao area as an example,the dip angle of the PV module was optimized.The overall dimming degree and the target satisfaction tolerance were adjusted.The optimal tilt angle of the PV module was 26.5°,and the annual irradiation amount of the inclined surface was 9.218kWh/m2/d,the cumulative deviation of monthly irradiation is 0.146 kWh/m2/d.Analyze the output characteristics and power mismatch characteristics of PV modules under partial occlusion,analyze the conventional MPPT and the algorithm principle and control flow based on Global Maximum Power Point(GMPPT),and design and optimize for multi-peak conditions.The GMPPT algorithm improves the output power of the entire photovoltaic power generation system through photovoltaic module structure optimization and GMPPT algorithm.The experimental platform of photovoltaic energy storage power station unit was developed,and the output characteristics of the system were experimentally studied.The results show that the optimization model is reasonable and feasible.