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Photovoltaic system MPPT fuzzy active-disturbance-rejection control method, controller and system

A technology of active disturbance rejection control and fuzzy controller, which is applied in the field of power electronics and automation, can solve problems such as fuzzy nonlinear active disturbance rejection control strategy, power oscillation, and slow tracking, etc., so as to improve tracking speed and light energy utilization rate , improve performance and improve efficiency

Inactive Publication Date: 2019-05-10
UNIV OF JINAN
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Problems solved by technology

Comprehensively, it can be summarized that the disadvantages of the existing MPPT control algorithm are: slow tracking, power oscillation, misjudgment, etc.
[0006] Through the above analysis, the researches at home and abroad use the linear active disturbance rejection control strategy to study the problem of maximum power point tracking (MPPT) in Boost converters, but they have not considered the use of fuzzy nonlinear active disturbance rejection control strategy to study the maximum power point Tracking (MPPT) Controller

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[0053] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0054] It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0055] Active disturbance rejection control is mainly aimed at a class of uncertain objects Where f is the unknown disturbanc...

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Abstract

The invention provides a photovoltaic system MPPT fuzzy active-disturbance-rejection control method, controller and system. A model of a photovoltaic power supply system based on a Boost convertor isestablished; disturbance is added around model stable working points, and a small signal dynamic equation of the Booster convertor is obtained; Laplace transformation is conducted on the small signaldynamic equation of the Booster convertor, and thus a transfer function of duty ratio disturbance quantity and photovoltaic battery output voltage disturbance quantity can be obtained; an output voltage is referred to design a first-order differential tracking device, an expanded state observer and an error state feedback control rate; and fuzzy control is used in the active-disturbance-rejection controller, the fuzzy control and the active-disturbance-rejection controller are combined to be applied to MPPT, through a fuzzy active-disturbance-rejection control strategy, the process of adjusting the parameter settings of the active-disturbance-rejection controller is simplified, adaptivity of the controller parameters is achieved, thus the MPPT control strategy has good disturbance rejection, dynamic response, stability and robustness, and the complex process of parameter setting is avoided.

Description

technical field [0001] The disclosure relates to the fields of automation and power electronics, in particular to a photovoltaic system MPPT fuzzy active disturbance rejection control method, controller and system. Background technique [0002] Photovoltaic power generation has the advantages of clean and environmental protection, convenient maintenance, simple installation, long life, no pollution, no noise, and no geographical restrictions. However, it also has the disadvantages of randomness, intermittent and low utilization rate of light energy. [0003] Some traditional MPPT tracking methods only use approximate linear relationship to control, such as: constant voltage method, these algorithms do not really realize MPPT. When the external environment changes drastically, the photovoltaic cell array will deviate from the maximum power point, resulting in power loss. [0004] The MPPT controller of the existing photovoltaic power supply system generally uses the observa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/67
CPCY02E10/56
Inventor 刘大志宗西举程新功衣文雨刘蕊刘依明陈镇镇唐文杰
Owner UNIV OF JINAN
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