电器与能效管理技术 ›› 2020, Vol. 587 ›› Issue (2): 47-53.doi: 10.16628/j.cnki.2095-8188.2020.02.008

• 分布式能源及并网技术 • 上一篇    下一篇

局部遮阴下光伏阵列的最大功率点追踪策略

王传捷1, 谷廷坤1, 吴昊2   

  1. 1.山东大学 电气工程学院,山东 济南 250061;
    2.国家电网济南市电力公司,山东 济南 250001
  • 收稿日期:2019-11-28 出版日期:2020-02-15 发布日期:2020-03-28
  • 作者简介:王传捷(1995—),男,硕士研究生,研究方向为光伏发电的最大功率追踪技术。谷廷坤(1966—),男,教授,研究方向为光伏发电器件的电气特性。吴 昊(1991—),男,工程师,主要从事电力设备状态监测研究。

Maximum Power Point Tracking Strategy for PV Arrays Under Partial Shading Conditions

WANG Chuanjie1, GU Tingkun1, WU Hao2   

  1. 1.School of Electrical Engineering, Shandong University, Jinan 250061, China;
    2.State Gird Ji’nan Electric Power Company, Jinan 250001, China
  • Received:2019-11-28 Online:2020-02-15 Published:2020-03-28

摘要: 在局部遮阴的情况下,光伏阵列的P-U特性曲线会出现多个局部最大功率点。传统的最大功率点追踪方法可以准确追踪到均匀光照下光伏阵列的最大功率点,然而在局部遮阴下则容易陷于局域最大功率点。针对这一缺陷,通过分析局部遮阴下光伏阵列的P-U以及I-U特性曲线,使用改进的扰动观察法追踪到所有的局域最大功率点,从而追踪到全局的最大功率点。MATLAB/Simulink仿真结果表明,该方法能够非常准确地追寻到全局最大功率点。

关键词: 光伏阵列, 局部遮阴, 特性曲线, 改进扰动观察法, 输出特性

Abstract: In the case of partial shading,a few local maximum power points appear in the P-U characteristic curve of the photovoltaic array.The traditional maximum power point tracking method can accurately track the maximum power point of the PV array under uniform illumination,but it is easy to fall into the local maximum power point under partial shading.In order to overcome this defect,the P-U and I-U characteristic curves of PV array under partial shading were analyzed.Also,the improved perturb & observe(P&O) was used to track the global maximum power point.And by means of MATLAB/Simulink simulation results,this method can track the global maximum power point accurately.

Key words: PV array, partially shading, characteristic curve, improved perturb &, observe, output characteristics