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Bezier-based polynomial photovoltaic array maximum power tracking method

A maximum power tracking and photovoltaic array technology, which is applied in photovoltaic power generation, instruments, regulating electrical variables, etc., can solve the problems of difficulty in widespread promotion, and the implementation process of photovoltaic array maximum power tracking is cumbersome, and achieves good tracking accuracy and effective maximum power tracking. , to achieve a simple effect

Active Publication Date: 2018-11-02
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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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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  • Bezier-based polynomial photovoltaic array maximum power tracking method
  • Bezier-based polynomial photovoltaic array maximum power tracking method
  • Bezier-based polynomial photovoltaic array maximum power tracking method

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Embodiment Construction

[0062] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0063] Such as figure 1 As shown, the maximum power tracking method for photovoltaic arrays based on Bezier polynomials includes the following steps:

[0064] S1. Test the actual irradiance and temperature of the photovoltaic array;

[0065] S2. Calculate the open circuit voltage V of the photovoltaic module under the actual test irradiance and temperature ocb , short-circuit current I scb and maximum power point (V mb ...

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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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Application Information

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IPC IPC(8): G05F1/67
CPCG05F1/67Y02E10/56
Inventor 师楠朱显辉苏勋文王国新韩龙王丽蔡鼎锴宋彦超王鑫锐
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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