dmppt photovoltaic power generation module based on time-sharing adaptive mct algorithm

Abstract

The invention discloses a DMPPT photovoltaic power generation module based on a time-sharing self-adaptive MCT algorithm. The module comprises a plurality of integrated photovoltaic panels connected in series. The integrated photovoltaic panels comprise the three photovoltaic wafer strings and one MPPT control chip. Each photovoltaic wafer string is connected with a Buck converter in series. The output ends of three Buck converters are connected in series and controlled by the MPPT control chip to achieve maximum power tracking of the integrated photovoltaic panels. A smallest number of control chips and sensors are adopted under any illumination condition, and all the photovoltaic units can output the maximum power. Compared with existing photovoltaic products, the module can completely make up power losses caused by a mismatching problem in the photovoltaic panels through only one current sensor and one control chip, and further integration of a photovoltaic optimizer is facilitated.

Description

【Technical field】 [0001] The invention belongs to the field of solar photovoltaic power generation, and in particular relates to a sub-photovoltaic panel-level distributed maximum power tracking photovoltaic power generation module based on a time-sharing adaptive maximum current tracking algorithm. 【Background technique】 [0002] Facing the global energy crisis and environmental problems caused by fossil fuels, solar energy is currently the most promising clean renewable energy. However, due to non-ideal conditions that exist in practice, such as shading, stains, thermal gradients, tilting, etc., the performance of photovoltaic systems is severely affected. For traditional centralized or photovoltaic string-level Maximum Power Point Tracking (MPPT) photovoltaic systems, the mismatch between photovoltaic panels will cause multiple peaks in the power-voltage curve of the photovoltaic array, making it difficult to locate the global maximum Power point (Maximum Power Point, MP...

AI Technical Summary

Problems solved by technology

However, due to non-ideal conditions that exist in practice, such as shading, stains, thermal gradients, tilting, etc., the performance of photovoltaic systems is severely affected

For traditional centralized or photovoltaic string-level Maximum Power Point Tracking (MPPT) photovoltaic systems, the mismatch between photovoltaic panels will cause multiple peaks in the power-voltage curve of the photovoltaic array, making it difficult to locate the global maximum Power Point (Maximum Power Point, MPP)

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