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用于三电平逆变器中点电压波动抑制与共模电压降低的改进空间矢量调制技术

Improved Space Vector Modulation Technique for Neutral-Point Voltage Oscillation and Common-Mode Voltage Reduction in Three-Level Inverter

语言:

中文摘要

三电平逆变器在开关矢量选择上优于两电平逆变器。针对三电平逆变器中点电压不平衡与共模电压(CMV)抑制相互耦合的问题,本文提出了一种改进的空间矢量调制技术,以实现两者的有效平衡与优化,提升逆变器的运行性能。

English Abstract

Three-level inverter has an outstanding performance and is more advantageous in the switching vector selection than two-level inverter. In particular, the neutral-point voltage unbalance and common-mode voltage (CMV) reduction of three-level inverter should be carefully regulated for the appropriate operation, both of which, however, are mutually coupled resulting that the conventional space vecto...
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SunView 深度解读

该技术直接应用于阳光电源的核心产品线——组串式及集中式光伏逆变器。三电平拓扑(如NPC/ANPC)是阳光电源大功率光伏逆变器的技术基石。中点电压平衡与共模电压抑制是提升系统效率、降低漏电流及满足电磁兼容性(EMC)标准的关键。该改进算法可优化逆变器输出质量,减少滤波器体积,提升系统可靠性。建议研发团队在下一代高功率密度组串式逆变器中评估该调制策略,以进一步降低开关损耗并提升电网适应性。