一种优化变步长电导增量法的 MPPT 控制

doi:10.12066/j.issn.1007-2861.1854

Abstract

Abstract:

As output characteristics of photovoltaic cells change with the change of environment, reasonable maximum power point tracking (MPPT) is a key in improving efficiency of a photovoltaic system. However, there is an inherent contradiction between tracking speed and steady-state accuracy in a fixed step algorithm. The traditional variable step algorithm lacks flexibility, and has a slow start speed, limiting tracking quality of MPPT. An improved variable step incremental conductance method is proposed to solve this problem. The algorithm can select a reasonable proportion coefficient for tracking according to different work locations to overcome problems in the traditional variable step size algorithm. Simulation with Matlab/Simulink shows feasibility of the algorithm under varying illumination conditions.

Key words: photovoltaic cell, maximum power point tracking (MPPT), variable step incremental conductance method, tracking ratio coefficient, phased incremental conductance method

CLC Number:

TM615

HU Kewei, RAN Feng, QIN Jiaqi, JI Yuan. MPPT control of a incremental conductance method with optimized variable step size[J]. Journal of Shanghai University（Natural Science Edition）, 2018, 24(5): 745-754.

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References 12

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MPPT control of a incremental conductance method with optimized variable step size

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