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Novel variable-step photovoltaic maximum power tracking system and method

A technology of maximum power tracking and photovoltaic system, which is applied in the direction of photovoltaic power generation, control/regulation system, and regulation of electric variables, etc., and can solve the problems of complicated sampling process and inconvenient application

Active Publication Date: 2016-03-23
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sampling process is complicated and not easy to apply in various environments

Method used

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  • Novel variable-step photovoltaic maximum power tracking system and method
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  • Novel variable-step photovoltaic maximum power tracking system and method

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Embodiment Construction

[0032] In the following, the present invention will be further described in detail in conjunction with the embodiments and accompanying drawings. It should be pointed out that, if there are any processes that are not specifically described in detail below, those skilled in the art can understand or implement them with reference to the prior art.

[0033] figure 1 It is a block diagram of a new photovoltaic maximum power tracking system, which is composed of a photovoltaic array, a boost circuit, a DSP (digital signal processing) controller, and a load. The system model is composed of a photovoltaic cell model, a boost circuit model, and a maximum power tracking control module. By sampling the output voltage and output current of the photovoltaic cell and entering the maximum power tracking control module, the method realizes and pulse width modulation, and the maximum power tracking control module outputs a point-to-point empty ratio signal, thereby realizing the maximum power...

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Abstract

The invention discloses a novel variable-step photovoltaic maximum power tracking system and method which are presented for the defects that a traditional maximum power tracking method cannot take both the dynamic property and the steady property into account and misjudgment is prone to occurring by taking a photovoltaic power generation system as a research object. The system is composed of a photovoltaic array, a boosted circuit, a DSP controller and a load, and the maximum power tracking method is a novel variable-step photovoltaic maximum power tracking control method based on a conductance increment method. Simulation verifies that when the outside light intensity acutely changes, the method can quickly and accurately track the system to change to quickly reach a new steady working point, and the better dynamic response characteristic is achieved; the important theoretical significance and practical value are achieved in the design of the photovoltaic power generation system.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a high-power tracking system and method. Background technique [0002] Solar photovoltaic power generation is an important form of solar energy utilization. It is a power generation method that uses solar cells to convert light energy into electrical energy. With the continuous advancement of technology, photovoltaic cells are one of the most promising power generation technologies. The basic principle of solar cells is the photovoltaic effect of semiconductors, that is, the photovoltage phenomenon is generated under sunlight irradiation. In 1954, Bell Laboratories in the United States first invented a crystalline silicon solar cell with PN junction as the basic structure. Since then, solar cells have been widely used in space technology, and now they are gradually being applied on the ground. Since solar photovoltaic power generation is not limited by ener...

Claims

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Application Information

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IPC IPC(8): G05F1/67
CPCG05F1/67Y02E10/56
Inventor 杨苹许志荣何婷宋嗣博叶超唐铖
Owner SOUTH CHINA UNIV OF TECH
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