Multi-path MPPT (maximum power point tracking) circuit and solar photovoltaic inverter

Abstract

The invention discloses a multi-path MPPT (maximum power point tracking) circuit and a solar photovoltaic inverter, and relates to the technical field of solar power generation. The multi-path MPPT circuit comprises multiple MPPT branch circuits, wherein each MPPT branch circuit is provided with two input ends and two output ends; energy storing units (1) and rectifying units (2) are arranged between first input ends and first output ends, and first ends of the energy storing units (1) are connected with the first input ends; first ends of the rectifying units (2) are connected with the first output ends, second ends of the energy storing units (1) are connected with second ends of the rectifying units (2), and the joint is connected with a first end of a switching tube unit (3); and a second end of the switching tube unit (3) is connected with second input ends and second output ends respectively. The multi-path MPPT circuit provided by the invention is provided with the multiple MPPT branch circuits which are connected in parallel, the appropriate conduction time of the switching tube is selected according to the conditions of the multiple MPPT branch circuits, MPPT points of the branch circuits are consistent, the construction difficulty is reduced, and the generating efficiency of a BIPV(building integrated photovoltaics) system is exerted to the maximum.

Description

technical field [0001] The invention relates to the technical field of solar power generation, in particular to a multi-channel MPPT circuit and a solar photovoltaic inverter. Background technique [0002] With the increasing emphasis on world environmental issues and national energy strategy issues, the large-scale development of new energy has received widespread attention from all countries in the world. The new energy industry has become the fastest growing industry in the world, and solar power will surpass nuclear power in the 21st century. As one of the most important basic energy sources, Building Integrated Photovoltaic (BIPV) has a good development prospect. In the future, BIPV will occupy 60% of the photovoltaic power generation market share, and has a very large room for development. [0003] Photovoltaic inverters are an important part and key link of photovoltaic power generation systems. The direct current generated by building-integrated photovoltaics must be...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: how to solve the problems of high construction difficulty and low power generation efficiency in the building integrated photovoltaic system

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