A mppt control of partially shadowed photovoltaic array based on random leapfrog global search algorithm

A photovoltaic array and global search technology, applied in photovoltaic power generation, control/regulation systems, instruments, etc.

Active Publication Date: 2021-07-13
XIANGTAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention: to solve the problems of the existing control technology of MPPT photovoltaic arrays under partial shadows, to propose a local shadowed photovoltaic array based on random leapfrog global search algorithm with few adjustment parameters, fast search speed, strong and stable optimization ability Multi-peak MPPT control method

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  • A mppt control of partially shadowed photovoltaic array based on random leapfrog global search algorithm
  • A mppt control of partially shadowed photovoltaic array based on random leapfrog global search algorithm
  • A mppt control of partially shadowed photovoltaic array based on random leapfrog global search algorithm

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[0040] In order to clarify the features and advantages of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings.

[0041] Such as figure 1 As shown, the present invention realizes the multi-peak MPPT control of the photovoltaic array under partial shadow based on the random leapfrog global search algorithm. At this time, the output of the photovoltaic array presents a multi-peak P-I Characteristic curve, the present invention uses the random leapfrog global search algorithm as the MPPT control module, and the light intensity and ambient temperature information of the photovoltaic array are imported I- SFLA-MPPT module, optimized for after The maximum point power of the photovoltaic array is compared with the real-time measured power of the photovoltaic array to obtain the deviation value, and the real-time maximum power point tracking of the photovoltaic array is realized by combining the fuzzy PI with...

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Abstract

The invention discloses a local shadow photovoltaic array multi-peak Maximum Power Point Tracking (MPPT) control method based on a random leapfrog global search algorithm. The output current of the photovoltaic array is used as the particle of the algorithm, and the power of the photovoltaic array is As the fitness function of the algorithm, the global maximum power point of the photovoltaic array can be found efficiently and accurately through the new fast and global search technology of the random leapfrog global search algorithm, and then the maximum power can be achieved by controlling the Boost circuit through the PWM duty cycle Points to track. This algorithm can solve the problem that the MPPT control of photovoltaic arrays with multi-peak output characteristics under local shadows is easy to fall into the local maximum power point. It can accurately find the global maximum power point, and has strong optimization ability, high search accuracy, and easy programming.

Description

technical field [0001] The invention relates to a multi-peak MPPT control method for a partially shadowed photovoltaic array, in particular to a multi-peak MPPT control method for a partially shadowed photovoltaic array based on a random leapfrog global search algorithm. Background technique [0002] With the popularization of solar power generation, the operating environment of photovoltaic arrays has become more and more complex. Partial shading causes multiple extreme points in the output characteristic curve of photovoltaic arrays, which affects the output efficiency of photovoltaic arrays, and even damages them due to hot spots. PV. In order to make the photovoltaic system work at the maximum power point and improve system efficiency, it is necessary to use an effective multi-peak maximum power point tracking algorithm. [0003] Traditional maximum power point tracking algorithms (such as fixed voltage method, perturbation and observation method and incremental conduct...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/67
CPCG05F1/67Y02E10/56
Inventor 易灵芝周东访刘罗黄其森
Owner XIANGTAN UNIV
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