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一种用于T型三电平变换器的降低共模电压、开关损耗及中点电压控制的载波基不连续PWM策略

A Carrier-Based Discontinuous PWM Strategy for T-Type Three-Level Converter With Reduced Common Mode Voltage, Switching Loss, and Neutral Point Voltage Control

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中文摘要

本文提出了一种针对T型三电平变换器的新型载波基不连续脉宽调制(CB_DPWM)策略。该策略被称为RCMV_CB_DPWM,其核心优势在于能够有效降低共模电压(CMV),同时减少开关损耗,并消除中点电压(NPV)的直流偏置,从而提升变换器的整体性能与稳定性。

English Abstract

A novel carrier-based discontinuous pulsewidth modulation (CB_DPWM) strategy for T-type three-level converter is proposed in this article. Because one significant advantage of the proposed CB_DPWM is the reduction of common mode voltage (CMV), it is named as RCMV_CB_DPWM hereafter. It also can reduce switching loss and remove dc offset from the neutral point voltage (NPV) simultaneously. RCMV_CB_D...
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SunView 深度解读

该研究直接服务于阳光电源的核心业务——光伏逆变器(尤其是组串式和集中式产品)及储能变流器(PCS)。T型三电平拓扑是阳光电源大功率逆变器和储能产品的主流拓扑之一。该研究提出的RCMV_CB_DPWM策略在降低共模电压方面具有显著优势,有助于减小漏电流,提升系统电磁兼容性(EMC)表现;同时,降低开关损耗可直接提升整机效率,减少散热压力,提升产品功率密度。建议研发团队在下一代高功率密度组串式逆变器及PowerTitan系列储能PCS的控制算法中进行验证与应用,以优化系统效率并降低对滤波器的设计要求。