Application of super capacitor in solar energy system The use of solar energy ultimately comes down to two aspects: solar energy utilization and sunlight utilization. Solar power generation is divided into photovoltaic power generation and solar thermal power generation. Photovoltaic power generation uses photovoltaic cells to directly convert solar energy into electrical energy. Photovoltaic power generation is far stronger than CSP in terms of conversion efficiency, equipment cost and development prospects. Since the advent of practical polysilicon photovoltaic cells, the application of solar photovoltaic power generation has begun in the world.
Currently, solar photovoltaic power generation systems have three development directions: independent operation, grid-connected and hybrid photovoltaic power generation systems. In an independent operation system, an energy storage unit is generally necessary. It can store the surplus electric energy generated by sunlight for use when there is insufficient or no sunlight. At present, the demand of the international photovoltaic energy industry has begun to develop from remote rural areas and special applications to a combination of grid-connected power generation and building power supply. Photovoltaic power generation has transitioned from supplementary energy to alternative energy. Domestic photovoltaic energy systems are still mainly used in remote areas without electricity and independent photovoltaic power generation systems such as urban street lights, lawn lights, courtyard lights, and billboards. The energy storage system composed of battery packs can smooth out fluctuations in electrical energy caused by fluctuations in solar light intensity, and can also compensate for voltage sags or surges in the grid system, but due to the limited number of charge and discharge times, the charge and discharge time for large currents is slow And other factors, so its service life is shorter and the cost is higher. Therefore, the use of super capacitor banks in solar photovoltaic power generation systems will make grid-connected power generation more feasible.
