← 返回

双逆变器馈电感应电机驱动多电平逆变器堆叠直流母线电容中点电压的瞬时平衡

Instantaneous Balancing of Neutral-Point Voltages for Stacked DC-Link Capacitors of a Multilevel Inverter for Dual-Inverter-Fed Induction Motor Drives

语言:

中文摘要

本文提出了一种用于变速驱动的多电平逆变器(MLI)堆叠直流母线中点(NP)电压瞬时平衡的新方法。该堆叠式MLI利用串联直流源和中点来获得所需的电平。通过在每相中使用低压电容馈电的级联H桥(CHB)来实现中点电压的平衡。

English Abstract

This paper proposes a novel method for instantaneous balancing of neutral-point (NP) voltages with stacked multilevel inverters (MLIs) for variable-speed drives. The stacked MLI uses series-connected dc sources and NPs (connecting points of dc sources) to obtain the desired levels. The balancing of NP voltages are obtained by using a low-voltage-capacitor-fed cascaded H-bridge (CHB) per phase of a...
S

SunView 深度解读

该技术主要针对多电平拓扑中的中点电位平衡问题,这对于阳光电源的高功率密度组串式逆变器及大型集中式光伏逆变器具有参考价值。虽然本文侧重于电机驱动应用,但其提出的级联H桥辅助平衡策略可为阳光电源在开发更高电压等级(如1500V及以上)的逆变器时,优化直流母线电容电压控制、降低纹波及提升功率模块可靠性提供理论支撑。建议研发团队关注该拓扑在光伏并网逆变器中降低电容应力与提升系统效率的潜力。