| 引用本文: | 唐 磊,曾成碧,徐 伟,苗 虹.一种新颖的光伏自适应变步长最大功率点跟踪算法[J].电力自动化设备,2013,33(11): |
| TANG Lei,ZENG Chengbi,XU Wei,MIAO Hong.Variable-step adaptive MPPT algorithm for photovoltaic system[J].Electric Power Automation Equipment,2013,33(11): |
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| 摘要: |
| 针对光伏P′（U）-U特性曲线的变化率在最大功率点两侧差异较大，传统变步长算法的步长及速度因子较难选择的问题，提出一种新的自适应变步长最大功率点跟踪算法，该算法根据光伏P′（U）-U曲线的几何特性自适应地选取步长。与其他变步长算法相比，该方法不需要计算最大步长及速度因子，避开了复杂的计算过程且不会因为步长选取的不恰当而产生死区问题。仿真结果表明该算法具有良好的动态跟踪速度和稳态跟踪精度。 |
| 关键词: 光伏电池 最大功率点跟踪 变步长 自适应算法 稳定性 |
| DOI： |
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| 基金项目:四川省科技厅支撑项目（2011fz0003，2012FZ0047） |
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| Variable-step adaptive MPPT algorithm for photovoltaic system |
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TANG Lei1, ZENG Chengbi1, XU Wei1,2, MIAO Hong1
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1.School of Electrical Engineering and Information，Sichuan University，Chengdu 610065，China;2.School of Electrical and Electronic Engineering，Huazhong University of Science and Technology，Wuhan 430000，China
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| Abstract: |
| Since the slopes of photovoltaic P′（U）-U characteristic curve at two sides of the maximum power point are different，the selection of step and velocity factor in traditional variable-step algorithms is difficult. A variable-step adaptive MPPT（Maximum Power Point Tracking） algorithm is proposed，which sets the step adaptively according to the geometric characteristics of photovoltaic P′（U）-U curve. Compared with other variable-step algorithms，the proposed algorithm avoids the calculation of maximum step and velocity factor，the complicated computation process and the dead zone caused by improper step. Simulative results show its good dynamic tracking velocity and steady-state tracking precision. |
| Key words: photovoltaic cells maximum power point tracking variable-step adaptive algorithm stability |
