High efficient four-level NNPC inverter with capacitor voltage control algorithm

被引：0
|
作者：
Kim B. [1 ,2 ]
Jun E.-S. [1 ,2 ]
Roh C. [1 ,2 ]
Kwak S. [1 ,2 ]
机构：
[1] School of Electrical and Electronics Engineering, Chung-ang University, Seoul
[2] School of Electrical and Electronics Engineering, Chung-ang University, Seoul
来源：
Transactions of the Korean Institute of Electrical Engineers | 2019年 / 68卷 / 04期
关键词：
4 Level NNPC inverter; Capacitor voltage control; Carrier Based PWM; Multilevel inverter; Switching Loss;
D O I：
10.5370/KIEE.2019.68.4.540
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
- Four-level NNPC (Nested Neutral Point Clamped) inverters have fewer components compared to other 4-level inverters and can operate from 2.4 kV to 7.2 kV without the need for additional switching devices. The 4-level NNPC inverter outputs the final switching signal in consideration of the output current and the capacitor voltage state, since the flying capacitor voltage of each phase should be controlled to Vdc / 3 and normal control is possible. A carrier based pulse width modulation (CBPWM) method is used meanwhile, a new capacitor voltage control algorithm is proposed to reduce the switching loss for the conventional capacitor voltage control. In this paper, a 4 - level NNPC inverter was designed for experimental setup was made for the experiment. The validity of the capacitor voltage control algorithm is verified through experimental results. Copyright The Korean Institute of Electrical Engineers
引用
收藏
页码：540 / 546
页数：6
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