Design and selection of off-grid photovoltaic power generation system

Design and selection of off-grid photovoltaic power generation system

      The photovoltaic off-grid power generation system does not rely on the power grid and operates independently. It is widely used in remote mountainous areas, non-powered areas, islands, communication base stations, street lights and other applications. It uses photovoltaic power generation to solve residents in areas without power, lack of power and unstable power, schools Or for the domestic and working electricity needs of small factories, photovoltaic power generation can partially or completely replace the power generation function of diesel generators by virtue of its economic, clean, environmentally friendly, and noise-free advantages.

       Classification and composition of off-grid photovoltaic power generation systems

       Off-grid photovoltaic power generation systems are generally divided into small DC systems, medium and small off-grid power generation systems, and large off-grid power generation systems. The small DC system is mainly to solve the most basic lighting needs in areas without electricity; the medium and small off-grid systems are mainly to solve the power demand of homes, schools, and small factories; the large off-grid power generation systems are mainly to solve the power consumption of the entire village and the entire island. Demand, the system is now also in the category of microgrid systems.

     The off-grid photovoltaic power generation system is generally composed of a photovoltaic square array composed of solar cell components, a solar controller, an inverter, a battery pack, and a load.

     The photovoltaic array converts solar energy into electric energy when there is light, through the solar controller, inverter (or inverter (or inverter) to supply power to the load, and at the same time to charge the battery pack; when there is no light, the battery is inverted by the battery The converter supplies power to the AC load.