Power supply method for grid-connected and off-grid dual-purpose wind and light complement power generation system

Abstract

The invention discloses a power supply method for a grid-connected and off-grid dual-purpose wind and light complement power generation system. The grid-connected and off-grid dual-purpose wind and light complement power generation system comprises a photovoltaic module, a fan, a wind and light complement controller, an inverter, a storage battery, a load and an unloading box, wherein the wind and light complement controller is used for converting power energy acquired by the photovoltaic module and the fan into direct current which is connected into a direct current bus; the storage battery is connected onto the direct current bus; and the inverter is connected onto the direct current bus and is used for converting the acquired direct current into alternating current. An operation method of the system is adjusted according to the state of a main network and the electricity quantity of the storage battery. According to the power supply method for the grid-connected and off-grid dual-purpose wind and light complement power generation system, which is provided by the invention, the problems that no power is supplied to rural users, the reliability of power supply is poor and the like are solved; clean renewable energy sources are fully utilized and the waste of the clean renewable energy sources is avoided; and the loss of the service life of the system is reduced while the power supply reliability of a user is ensured and the service life of the system is prolonged.

Description

technical field [0001] The invention relates to wind turbine and photovoltaic power generation technology, in particular to a power supply method for a small-scale wind-solar complementary power generation system with both parallel and off-grid functions. Background technique [0002] With the rapid development of the national economy and the continuous improvement of people's living standards, the requirements for the reliability of power grid power supply are getting higher and higher. my country's rural areas are vast, the power supply radius in rural areas is long, and the reliability of power supply is poor. The household-use wind-solar hybrid power generation system can effectively improve the reliability of power supply for users. [0003] At present, the existing household wind-solar hybrid power generation system can only supply power to the load by the wind-solar hybrid power generation device or the main grid alone, that is, when the wind-solar power generation is...

AI Technical Summary

Problems solved by technology

In this way, the battery works in a deep charge-discharge cycle, which reduces the life of the battery. Once the battery fails to work, the system will also fail to operate.

Images