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电网技术  2014 

微电网逆变器自适应下垂控制策略

DOI: 10.13335/j.1000-3673.pst.2014.09.011, PP. 2386-2391

Keywords: 分布式电源,并联系统,负荷分配,调节下垂

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Abstract:

在多分布式电源(distributedgenerations,DGs)并联系统中,通常采用传统下垂控制实现负荷分配。由于线路阻抗和本地负荷的影响,传统下垂控制会产生较大的功率分配误差。为提高功率分配的精确性,提出了一种自动调节下垂系数的控制策略。各逆变器在传统P-V下垂控制下,将输出有功功率信息送到中央控制器,计算给定功率,并返回给各逆变器本地控制器,通过PI调节器自动调节各自的P-V下垂系数。仿真和实验结果验证了该策略的可行性。

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