Solar photovoltaic panel battery sub string-level optimization circuit structure and optimization way

Abstract

The invention discloses a solar photovoltaic panel battery sub string-level optimization circuit structure and optimization way. The optimization circuit structure at least comprises a first chip IC1, a second chip IC2 ad a third chip IC3; and a first solar battery sub string, a second solar battery sub string and a third solar battery sub string adjust voltage and current through the first chip IC1, the second chip IC2 and the third chip IC3 respectively, and maximum function can be obtained at any state, and current and voltage are output through a cable connector. The adjustment of the voltage and the current of each solar battery sub string is realized by the respective chip; each string of the battery can be subjected to MPPT and direct current optimization; by eliminating mismatching in all battery panels or between battery panels, such as shadow shielding between arrays, pollution on the surface of an assembly, shadow shielding of obstacles around a power station, and the like, maximum supplying for each string of the battery in the same condition and environment can be realized, so that electric energy production can be improved, layout of dense solar panels can be realized, and system reliability can be improved.

Description

technical field [0001] The invention relates to the technology in the field of photovoltaic power generation, in particular to a solar photovoltaic panel battery sub-string optimization circuit structure and an optimization method. Background technique [0002] Photovoltaic power generation is based on the principle of photovoltaic effect, using solar cells to directly convert sunlight energy into electrical energy. Regardless of whether it is used independently or connected to the grid, the photovoltaic power generation system is mainly composed of three parts: solar panels (components), controllers and inverters. In order to achieve the maximum output power, solar panels are mostly constructed by connecting multiple solar cells in series. Traditional solar panels only have three diodes, which have no optimization function. When one of the battery packs is shaded, the power generation of the entire assembly will Affected, the power generation is greatly reduced, and it is ...

AI Technical Summary

Problems solved by technology

In order to achieve the maximum output power, solar panels are mostly constructed by connecting multiple solar cells in series. Traditional solar panels only have three diodes, which have no optimization function. When one of the battery packs is shaded, the power generation of the entire assembly will Affected, the power generation is greatly reduced, and it is difficult to achieve dense solar panel layout

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