Photovoltaic maximum power point tracking control method and device based on grey wolf algorithm

A technology of maximum power point and control method, applied in the field of solar photovoltaic power generation, can solve problems such as falling into local optimum, large oscillation, and many random parameters

Inactive Publication Date: 2017-03-08
BEIJING INFORMATION SCI & TECH UNIV
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Problems solved by technology

[0004] The present invention provides a photovoltaic maximum power point tracking control method and device based on the gray wolf algorithm, which solves the problem that the maximum power point tracking method in the prior art has many random parameters, slow convergence speed, large oscillation during work, and easy to fall into the trap due to improper handling. Technical Problems of Local Optima

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  • Photovoltaic maximum power point tracking control method and device based on grey wolf algorithm

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[0023] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as figure 1 As shown, it is a schematic diagram of the circuit structure of the photovoltaic maximum power tracking (Maximum Power Point Tracking, MPPT) system. The MPPT controller samples the output current I of the photovoltaic array PV and the output voltage U PV , output duty cycle control signal to control the photovoltaic array to work stably at the maximum power point. Depend on figure 1 The input-output relationship of the Boost converter in

[0025] Equivalent resistance of Boost circuit Then the duty cycle can be expressed as Correspondingly, the maximum duty cycle Minimum duty cycle R is the load resistance. It can be seen that by adjusting the duty ratio d, the equivalent resistance of the Boost ...

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Abstract

The invention relates to the field of solar energy photovoltaic power generation, and discloses a photovoltaic maximum power point tracking control method and device based on a grey wolf algorithm. The duty ratio of a transducer serves as a grey wolf, and the maximum power of a photovoltaic array under the condition of partial shading is tracked by means of the grey wolf optimization algorithm. The voltage output and the current output are relatively stable, the tracking speed is fast, the dynamic response oscillation is small, the problem of steady state oscillation does not exist, and the efficiency of the a photovoltaic power generation system is effectively improved.

Description

technical field [0001] The invention relates to the field of solar photovoltaic power generation, in particular to a control method and device for tracking photovoltaic maximum power points based on gray wolf algorithm. Background technique [0002] The solar panel is extremely vulnerable to being blocked by dark clouds, trees and surrounding buildings, etc. and is in partial shade conditions, resulting in a decrease in the output power of the battery, and even damage to the battery due to hot spots. In order to make effective use of solar cells and improve the efficiency of photovoltaic power generation, it is necessary to study the mathematical model and maximum power tracking of photovoltaic arrays under partial shadow conditions, and shadow conditions may occur at any time. The ability to smoothly track to the global maximum power point. [0003] Under local shadow conditions, the traditional MPPT method fails because it can only track one of the local extremum points. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/67
CPCG05F1/67Y02E10/56
Inventor 张巧杰王凯丽
Owner BEIJING INFORMATION SCI & TECH UNIV
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