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两电平背靠背变换器直流母线电容二次载波频带谐波电流抑制

DC-Link Capacitor Second Carrier Band Switching Harmonic Current Reduction in Two-Level Back-to-Back Converters

语言:

中文摘要

本文提出了一种针对两电平三相背靠背变换器直流母线电容的开关谐波电流主动抑制方法。该方法基于直流母线开关谐波电流的解析解,通过控制脉宽调制(PWM)载波波形的相位角,有效降低了二次载波频带内的谐波电流,从而优化了直流母线电容的应力与寿命。

English Abstract

This paper proposes an active switching harmonic current reduction method within the dc-link capacitor of two-level, three-phase, back-to-back converters. This method is based on the derived analytical solution for switching harmonic currents in the dc-link. It is shown that by controlling the pulse width modulation carrier waveform's phase angles, the harmonics in the second carrier band of the r...
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SunView 深度解读

该技术对阳光电源的核心产品线具有重要价值。在组串式光伏逆变器、风电变流器以及储能变流器(PCS)中,直流母线电容是影响系统可靠性和功率密度的关键瓶颈。通过优化PWM载波相位来抑制谐波,不仅能减少电容的发热损耗,延长电容使用寿命,还能降低对滤波电容容量的需求,从而减小设备体积并降低成本。建议研发团队在PowerTitan储能系统及大功率组串式逆变器控制算法中引入该相位控制策略,以提升产品在严苛工况下的可靠性。