Solar control system capable of providing direct-current power supply and control method thereof

Abstract

The invention relates to a solar control system capable of providing a direct-current (DC) power supply and a control method thereof. The solar control system comprises a solar controller and a solar cell plate array. The solar control system is characterized in that the output of the solar cell plate array is connected with the solar controller; the output of the solar controller is directly connected with an electrical appliance requiring a DC power supply and in parallel connection with a high voltage storage electrolytic capacitor on the DC power supply side of the electrical appliance; the solar controller comprises a main control MCU (microprogrammed control unit), a DC-DC isolated converter circuit, a DC voltage isolation sampling unit circuit and a DC voltage sampling unit circuit; the solar cell plate array consists of more than two control and conversion units; and each control and conversion unit contains a solar cell plate and an MPPT (maximum power point tracking) and BOOST control unit. By adopting the solar control system, the solar energy after DC-DC conversion, is in parallel connection with the rectified DC of the city power directly; and the solar control systemhas the characteristics of flexible operation, stable performance and wide application range.

Description

technical field [0001] The invention relates to a solar control system capable of providing DC power and a control method thereof. Background technique [0002] Existing solar technology is basically based on lighting, large-scale power generation projects, etc.; the application of power supplies for household appliances such as air conditioners and refrigerators is also to convert solar energy into AC power, and then convert it into DC power again. Inverting once, the efficiency is low; at the same time, it needs to be synchronized with the mains, and the circuit is complicated; the effect of using a separate network is not good when there is no sun. [0003] Solar panels are generally directly connected in parallel or in series. When a certain panel fails or is shaded, the work of the solar panel array will be greatly affected. The whole power system doesn't even work properly. Contents of the invention [0004] The purpose of the present invention is to provide a sola...

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Problems solved by technology

[0002] Existing solar technology is basically based on lighting, large-scale power generation projects, etc.; the application of power supplies for household appliances such as air conditioners and refrigerators is also to convert solar energy into AC power, and then convert it into DC power again. Inverting once, the efficiency is low; at the same time, it needs

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