上海大学学报(自然科学版) ›› 2018, Vol. 24 ›› Issue (5): 745-754.doi: 10.12066/j.issn.1007-2861.1854

• 研究论文 • 上一篇    下一篇

一种优化变步长电导增量法的 MPPT 控制

胡可维, 冉峰, 秦嘉琦, 季渊()   

  1. 上海大学 微电子研究与开发中心, 上海 200444
  • 收稿日期:2016-10-31 出版日期:2018-10-30 发布日期:2018-10-26
  • 通讯作者: 季渊 E-mail:jiyuan@shu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(61376028);上海市科委专项基金资助项目(13111104600)

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

HU Kewei, RAN Feng, QIN Jiaqi, JI Yuan()   

  1. Microelectronic Research and Development Center, Shanghai University, Shanghai 200444, China
  • Received:2016-10-31 Online:2018-10-30 Published:2018-10-26
  • Contact: JI Yuan E-mail:jiyuan@shu.edu.cn

摘要:

由于光伏电池的输出特性会随着环境变化而改变, 因此, 合理的最大功率点跟踪 (maximum power point tracking, MPPT) 技术是提高光伏发电系统效率的关键. 但在定步长算法中, 跟踪速度和稳态精度之间存在固有矛盾, 而传统变步长算法在光照变化下缺乏灵活性, 起动速度慢, 制约了 MPPT 的跟踪质量. 针对此问题, 提出一种优化的变步长电导增量法. 该算法可根据工作点位置选取合理的跟踪比例系数, 克服了传统变步长算法动态响应速度慢、精度不高的问题. 在 Matlab/Simulink 下的仿真结果证实了该算法在变化的光照情况下的可行性.

关键词: 光伏电池, 最大功率点跟踪, 变步长电导增量法, 跟踪比例系数, 分阶段电导增量法

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

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