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多单元DC-AC变换器共模噪声抵消的PWM策略

PWM Strategy for the Cancellation of the Common Mode Noise Generated in a Multicell DC–AC Converter

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中文摘要

本文提出了一种输入并联输出串联(IPOS)多单元DC-AC变换器的新型控制律,旨在抵消共模(CM)噪声,同时保持较低的差模(DM)噪声。该控制律被称为交错对称单极性调制,通过特定条件设置,实现了偶数个单元下的共模噪声抵消,为电力电子变换器的电磁兼容性设计提供了理论支持。

English Abstract

A new control law of an input parallel output serie dc–ac multicell converter is proposed to cancel the common-mode (CM) noise while keeping the differential-mode (DM) noise low. The control law called interleaved symmetrical unipolar respects the conditions studied and detailed in this article to achieve CM noise cancellation. The conditions are generalized whatever an even number of cells in ser...
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SunView 深度解读

该研究提出的多单元变换器共模噪声抵消技术,对阳光电源的组串式及集中式逆变器研发具有重要参考价值。随着光伏系统电压等级不断提升,电磁兼容性(EMC)挑战日益严峻,该调制策略有助于优化逆变器输出滤波设计,减小磁性元件体积,提升功率密度。建议研发团队在下一代高压组串式逆变器或大功率集中式逆变器中评估该交错对称单极性调制算法,以降低共模电流对电网及设备的影响,提升产品在复杂电磁环境下的可靠性。