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有源升降压逆变器双模式调制策略研究

DOI: 10.13334/j.0258-8013.pcsee.2014.30.006, PP. 5306-5312

Keywords: 宽输入,升降压逆变器,恒升压比,双模式

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Abstract:

新能源发电系统要求逆变器具有宽输入电压适应能力,该文基于有源升降压逆变器拓扑,对恒升压比调制和双模态调制两种调制方法进行对比。双模态调制根据不同的直流输入与瞬时的交流输出电压大小关系,使电路呈现出不同的等效电路结构,且每种结构均只有部分开关管高频工作,有利于提高变换效率。还对两种调制下电感电流、开关管电流应力进行分析比较。实验结果表明,该变换器可双模式工作,具有宽输入电压适应能力。

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