Maximum Power Tracking Method for Photovoltaic Array Based on Bezier Polynomials

Abstract

The invention discloses a Bezier-based polynomial photovoltaic array maximum power tracking method. The method includes: during the process of measuring actual irradiance and temperature value of a photovoltaic array, calculating maximum power point parameter of a photovoltaic array, acquiring an output characteristic curve of the same, and performing polynomial fitting to obtain a fitting result;according to an incremental conductance method and voltage and current measured in real time, slightly adjusting a maximum power point acquired through theoretical calculation, and taking a voltage value acquired by detection as an independent variable to enable working output characteristics of a photovoltaic module to be at maximum power point voltage after slight adjusting and to enable the photovoltaic module to work at maximum output power to realize maximum power tracking of the photovoltaic array. The method can realize effective maximum power tracking and has the advantages of being simple to realize and high in tracking accuracy.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic array maximum power tracking research, in particular to a photovoltaic array maximum power tracking method based on Bezier polynomials. Background technique [0002] Low photoelectric conversion efficiency is one of the main bottlenecks currently restricting the further development of photovoltaic power generation technology. In order to improve the power generation efficiency of photovoltaic arrays, it is necessary to use maximum power tracking technology to control the output of photovoltaic arrays under different working conditions to ensure that the working conditions change When the photovoltaic power station can run near the maximum power point, it has good practical significance to improve the power generation capacity of the photovoltaic power station. [0003] Relevant scholars at home and abroad have conducted in-depth research on the maximum power tracking technology of photovoltai...

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the maximum power tracking method for photovoltaic arrays based on Bezier polynomials provided by the present invention solves the problems in the prior art that the implementation process of maximum power tracking of photovoltaic arrays is cumbersome and difficult to be widely promoted in engineering.

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