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一种新型的正激并网微逆变器

, PP. 286-294

Keywords: 正激,微逆变器,软开关,相位差

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Abstract:

反激并网微逆变器存在输出电流纹波较大、入网电流与电网电压有相位差和功率容量较小等问题。针对以上问题,本文提出了一种基于正激变换器的并网微逆变器拓扑结构及其控制策略。原边采用双管正激电路,减小了开关管的应力,同时实现了变压器的磁芯复位;引入LCD箝位电路,实现了原边开关管的软开关,提高了整机效率;输出滤波采用L滤波器,保证了入网电流与电网电压没有相位差。文中详细分析了该逆变器的工作原理,分析了入网电流的相位差,最后进行仿真和实验验证。

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