Application of supercapacitor in solar energy storage system

Solar energy is a kind of renewable energy with abundant reserves. In recent years, as countries around the world attach importance to new energy, the installed capacity of solar power generation has continued to increase, and photovoltaic power generation has developed rapidly. Because the power supply characteristics of the photovoltaic power generation system and the load demand are different in time, the system operation stability and power supply quality cannot be compared with the conventional power generation system, so it is necessary to rely on the energy storage link to control and adjust the power quality of the photovoltaic power generation system. , in order to complete the efficient and high-quality utilization of solar energy.

There are a variety of energy storage systems to choose from, including lithium batteries, lead-acid batteries, flywheel energy storage systems, and supercapacitor energy storage systems. Compared with other energy storage methods, supercapacitors not only have the advantages of wide operating temperature range, sensitive and convenient system design, high energy storage efficiency and no environmental pollution, but also have strong advantages in power density and charging and discharging speed.

By analyzing the characteristics of supercapacitors , a photovoltaic power generation system model with supercapacitor energy storage system is built. Using MATLAB/simulink as the simulation platform to conduct control simulation, analyze the motion characteristics and control effect of the supercapacitor energy storage device in response to changes in light intensity and fit fluctuations. The results show that the supercapacitor can effectively stabilize the bus voltage and improve the stability of the photovoltaic power generation system. sex.