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电网技术  2015 

双极性直流微网的分层控制策略

DOI: 10.13335/j.1000-3673.pst.2015.08.023, PP. 2217-2222

Keywords: 双极性直流微网,分层控制,半实物平台

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Abstract:

分析了双极性直流微网的结构和优点,针对其结构和功率分配中下垂控制的问题,提出了一种由本地控制和二次调节组成的分层控制策略。本地控制包含中点电位控制和下垂控制,解决微网的中点电位不平衡问题和实现对微网中负载功率的初步分配;二次调节采用分布式补偿控制,消除线路阻抗的影响,实现负载功率的精确分配。对该分层控制策略进行了理论研究,并分析了系统的中点电位调节能力。在半实物平台上进行了相关实验验证,结果证明了该控制方法的有效性。

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