| 引用本文: | 孙 博,梅 军,郑建勇.局部阴影条件下最大功率点跟踪改进算法[J].电力自动化设备,2014,34(1): |
| SUN Bo,MEI Jun,ZHENG Jianyong.Improved MPPT method under partial shading conditions[J].Electric Power Automation Equipment,2014,34(1): |
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| 摘要: |
| 利用MATLAB对光伏阵列在不同阴影情况下的输出特性进行仿真，并总结出光伏阵列可能出现局部最大功率点电压与开路电压之间的规律。根据该规律提出改进型电导增量法，将参考电压依次设为可能出现局部最大功率点的电压以避免漏掉任何一个峰值点，并通过比较这些局部最大功率点，追踪到全局最大功率点。设置参考电压阈值以判断是否存在局部最大功率点，减少搜索时间。仿真结果验证了该算法在有、无阴影的情况下都能准确搜索到全局最大功率点。 |
| 关键词: 光伏电池 局部阴影 全局最大功率点跟踪算法 电导增量法 开路电压 |
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| 基金项目:国家高技术研究发展计划（863计划）资助项目（2008-AA052421） |
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| Improved MPPT method under partial shading conditions |
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SUN Bo, MEI Jun, ZHENG Jianyong
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College of Electrical Engineering，Southeast University，Nanjing 210096，China
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| Abstract: |
| The output characteristics of photovoltaic array under different partial shading conditions are simulated with MATLAB and the relationship between the voltage of probable local maximum power point and the open circuit voltage of photovoltaic array is summarized，according to which，an improved incremental conductance method is proposed. It sets the voltage of probable partial maximum power point as the reference voltage successively to prevent any peak point missing and compares the local maximum power points to track the global maximum power point. The reference voltage threshold is set to detect the local maximum power point for reducing the searching time. Simulative results verify that the proposed method can accurately find out the global maximum power point under both none and partial shading conditions. |
| Key words: photovoltaic cells partial shading global MPPT algorithm incremental conductance open circuit voltage |
