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电网技术  2015 

太阳能光伏电站等效建模

DOI: 10.13335/j.1000-3673.pst.2015.05.001, PP. 1173-1178

Keywords: 光伏电站,等值建模,稳态工作点,动态特性,最大功率跟踪

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Abstract:

提出了光伏电池在无遮挡以及部分遮挡2种情况下光伏电站的等效建模方法。首先根据光伏电池的外特性进行聚合,获得等效光伏电池的外特性;分析了当光伏电池部分遮挡时,等效光伏组件的最大功率点出现漂移,此时根据光伏电池聚合获得的等效光伏单元的功率大于实际值。为获得光伏电池部分遮挡情况下光伏电站的等效模型,根据光伏电站PCC点处测量得到的功率、电压以及实际环境信息,以理想光伏电池外特性作为拟合函数,进而辨识光伏阵列的并联数目。算例结果表明,该方法兼具较高的稳态与动态精度,适用于光伏电池型号不同或部分遮挡下的光伏电站等效建模。

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