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Method for tracing maximum power of photovoltaic system based on finite time fuzzy sliding mode control

A technology of maximum power tracking and limited time, which is applied in control/regulation systems, photovoltaic power generation, instruments, etc., and can solve problems such as the inability to guarantee fast tracking effects and the lack of quantitative analysis

Active Publication Date: 2019-01-11
MINJIANG UNIV
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Problems solved by technology

The traditional maximum power tracking control of solar photovoltaic power generation cannot guarantee fast tracking effect and most of the proposed control theories lack strict quantitative analysis

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  • Method for tracing maximum power of photovoltaic system based on finite time fuzzy sliding mode control
  • Method for tracing maximum power of photovoltaic system based on finite time fuzzy sliding mode control
  • Method for tracing maximum power of photovoltaic system based on finite time fuzzy sliding mode control

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Embodiment Construction

[0078] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0079] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. 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 application belongs.

[0080] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. 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 combina...

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Abstract

The invention relates to a method for tracing the maximum power of a photovoltaic system based on finite time fuzzy sliding mode control. Firstly, the maximum power tracing problem of the photovoltaicsystem is re-interpreted in a model framework of a singular nonlinear system. Then, a T-S fuzzy modeling method is used for selecting six fuzzy sets to carry out fuzzification on the singular nonlinear system to obtain a singular T-S fuzzy system. A finite time fuzzy sliding mode controller is designed, and the time of reaching a sliding mode surface by the photovoltaic system is calculated. On the basis of a calculated time interval, an error limit of realizing maximum power tracing of the system when the photovoltaic control system reaches the sliding mode surface is further calculated. According to the method, the maximum power of the photovoltaic system can be traced in finite time under external disturbance, so that the photovoltaic power generation efficiency is improved; and the method has a wide market application prospect.

Description

technical field [0001] The invention relates to the field of large new energy power generation systems, in particular to a maximum power tracking method of a photovoltaic system based on finite-time fuzzy sliding film control. Background technique [0002] With the intensification of environmental pollution, people began to increase the construction of new energy power generation systems. The typical representative of the cleanest energy, the solar photovoltaic power generation system, has high investment costs, so it is very important to ensure its maximum power generation. The traditional maximum power tracking control of solar photovoltaic power generation cannot guarantee fast tracking effect and most of the proposed control theories lack strict quantitative analysis. Contents of the invention [0003] In view of this, the purpose of the present invention is to propose a maximum power tracking method for photovoltaic systems based on finite-time fuzzy sliding film con...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/67
CPCG05F1/67Y02E10/56
Inventor 钟智雄林文忠张祖昌邵振华
Owner MINJIANG UNIV
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