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电网技术  2015 

基于粒子群优化算法的并网光伏发电单元建模

DOI: 10.13335/j.1000-3673.pst.2015.05.007, PP. 1213-1218

Keywords: 光伏发电单元,参数辨识,粒子群算法,比例积分控制

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Abstract:

以状态空间平均法为基础,建立了单级式并网发电系统单元的模型,主要包括3个部分光伏阵列、逆变器及控制器、并网侧LC滤波器和线路等环节的等效阻抗,利用粒子群优化算法分步辨识内环和外环模型参数。首先在d轴内环控制器的参考电流上施加阶跃扰动,辨识内环控制模型的参数;然后简化等效内环控制器模型为一阶惯性环节,辨识其模型参数;最后在光伏阵列最大功率点输出侧的直流电压上施加阶跃扰动,以等效内环控制模型为基础,辨识外环控制模型的参数。在Matlab中分别建立光伏并网发电单元系统的详细模型和所提的传递函数模型,结果验证了所提模型的合理性。

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