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电网技术  2015 

基于并网点电压控制的逆变器分布式并网谐振抑制策略

DOI: 10.13335/j.1000-3673.pst.2015.02.006, PP. 334-340

Keywords: 分布式发电,并网逆变器,谐振抑制,公共连接点,电压控制

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Abstract:

分布式电网的动态多变性使得并网逆变器的控制具有一定的挑战,设计一种带有谐振抑制功能的控制算法具有重要意义。为此,提出了一种基于并网点电压控制的谐振抑制策略。首先,分析了并网逆变器与电网的交互影响和谐振机理。其次,利用谐振时并网点电压畸变的特点,设计了控制方程式。并根据数学模型进行了稳定性分析,以及从理论上证明了通过并网点电压控制可以消除系统谐振。最后,通过在组串型光伏并网逆变器上的对比实验,验证了该控制策略的有效性。

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