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多绕组高频变压器隔离式多电平变换器研究

, PP. 97-102

Keywords: 多电平变换器,多绕组高频变压器,功率平衡,级联H桥变换器

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Abstract:

为在高压大功率变换领域中省去工频变压器,并实现隔离、功率平衡和能量双向流动,提出了一种高频变压器隔离式级联型多电平变换器拓扑。级联H桥整流器和级联型逆变器的各个直流母线与采用多绕组高频变压器的隔离单元相连接,可通过多绕组变压器简单地实现各级负载不均衡时的功率平衡。本文给出了多绕组高频变压器隔离式多电平变换器的拓扑结构,并给出了包括级联H桥整流器控制和高频隔离单元控制的控制策略。实验结果验证了本文提出的拓扑和控制策略的正确性。

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