New Modulation Strategy to Balance the Neutral-Point Voltage for Three-Level Neutral-Clamped Inverter Systems

被引：123
|
作者：
Choi, Ui-Min [1 ]
Lee, June-Seok [2 ]
Lee, Kyo-Beum [2 ]
机构：
[1] Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg, Denmark
[2] Ajou Univ, Dept Elect & Comp Engn, Suwon 443749, South Korea
来源：
IEEE TRANSACTIONS ON ENERGY CONVERSION | 2014年 / 29卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
Carrier-based PWM (CB-PWM); Multilevel; neutral-point clamped (NPC) inverter; neutral-point voltage balancing; space vector modulation; T-type inverter;
D O I：
10.1109/TEC.2013.2293502
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
This paper proposes a new modulation strategy that balances the neutral-point voltage for three-level neutral-clamped inverter systems. The proposed modulation replaces the P-type or N-type small switching states with other switching states that do not affect the neutral-point voltage. The zero and medium switching states are employed to help the neutral-point voltage balancing. This method little bit increases the switching events and output total harmonic distortion. However, this method has a strong balancing ability at all regions. Further, it is very simple to implement in both space vector modulation and carrier-based PWM methods. Simulation and experimental results verify the validity and feasibility of the proposed new modulation strategy
引用
收藏
页码：91 / 100
页数：10
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