What is the structure and principle of wind-solar hybrid power supply system?

Wind-solar hybrid power supply system is mainly composed of wind turbine generator, solar photovoltaic battery, controller, battery, inverter, AC/DC load, etc. This system is a composite renewable energy power generation system which integrates wind energy, solar energy, battery and other energy generation technologies and system intelligent control technologies.

(1) In the wind power generation part, the wind turbine is used to convert wind energy into mechanical energy, and the mechanical energy is converted into electric energy by the wind generator, then the battery is charged by the controller, and the load is supplied with power by the inverter;

(2) In the photovoltaic power generation part, the photovoltaic effect of solar panels is used to convert light energy into electric energy, and then the storage battery is charged, and the inverter is used to convert direct current into alternating current to supply power to the load;

(3) The inverter system consists of several inverters, which convert the direct current in the storage battery into standard 220v alternating current to ensure the normal use of alternating current load equipment. At the same time, it also has the function of automatic voltage stabilization, which can improve the power supply quality of wind-solar hybrid power generation system;

(4) The control part continuously switches and adjusts the working state of the battery pack according to the changes of sunshine intensity, wind power and load: on the one hand, the adjusted electric energy is directly sent to DC or AC load. On the other hand, the excess electric energy is sent to the battery pack for storage. When the power generation can't meet the needs of the load, the controller sends the electric energy of the battery to the load, which ensures the continuity and stability of the whole system.

(5) The storage battery is composed of several storage batteries, which play two roles of energy regulation and load balance in the system. It converts the electric energy output by wind power generation system and photovoltaic power generation system into chemical energy and stores it for use when the power supply is insufficient.

Wind-solar hybrid power generation system can operate in the following three modes according to the changes of wind power and solar radiation: the wind turbine independently supplies power to the load; Photovoltaic power generation system separately supplies power to the load; Wind turbines and photovoltaic power generation systems jointly supply power to loads.