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Maximum power tracking control method for photovoltaic system under partial shading

A maximum power tracking, photovoltaic system technology, applied in photovoltaic power generation, control/regulation systems, output power conversion devices, etc. High solution accuracy, improved photoelectric conversion efficiency, and small error

Inactive Publication Date: 2018-08-28
SHENZHEN POWER SUPPLY BUREAU
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when dealing with such multimodal problems, the particle swarm algorithm still has problems such as slow convergence speed, low control precision and easy premature convergence.

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  • Maximum power tracking control method for photovoltaic system under partial shading
  • Maximum power tracking control method for photovoltaic system under partial shading
  • Maximum power tracking control method for photovoltaic system under partial shading

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Embodiment Construction

[0036] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0037] An embodiment of the present invention provides a maximum power tracking control method for a photovoltaic system under partial shading.

[0038] Among them, for the basic characteristics of photovoltaic cells, a single photovoltaic cell can be equivalent to a simplified circuit model, such as figure 1 shown. This model contains a current source I g , a diode D and a series resistor R s...

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Abstract

The invention discloses a maximum power tracking control method for a photovoltaic system under partial shading. The method mainly comprises the steps of an initialization strategy, a constraint mechanism, fitness calculation, horizontal crisscross, vertical crisscross, global optimization saving and the like. A vertical and horizontal crisscross algorithm adopted by the method is a current novelintelligent optimization algorithm, and compared with particle swarm optimization (PSO), a genetic algorithm (GA) and other intelligent optimization algorithms, the vertical and horizontal crisscrossalgorithm achieves the high-dimensional non-convex multi-peak optimization purpose and has the advantages of high solution precision, high convergence speed and the like. The algorithm achieves the optimization iteration process of a population through the horizontal crisscross, the vertical crisscross and a competition operator, and finally the optimal solution is obtained.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation systems, in particular to a maximum power tracking control method of a photovoltaic system under partial shading. Background technique [0002] Photovoltaic energy has become a widely used renewable energy because of its sustainability, cleanliness and maintenance-free characteristics. However, the output density of a photovoltaic power generation system is very low and mainly depends on the installation environment and the surface temperature of the photovoltaic array. In the case of partial shading, the output power of the photovoltaic power generation system will be greatly reduced, resulting in a large amount of energy loss. The P-U curve of the photovoltaic array will produce multiple peaks under partial shading conditions. In order to maximize the output power of the photovoltaic power generation system as much as possible, it is necessary to use the maximum power poin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/67G06N3/00H02M3/00
CPCG05F1/67G06N3/006H02M3/00H02M1/0012Y02E10/56
Inventor 张炀
Owner SHENZHEN POWER SUPPLY BUREAU
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