A Simple Control Method for Neutral-Point Voltage Oscillation Reduction of Three-level Neutral-Point-Clamped Inverter

被引：0

作者：

Cho, Ja-Hwi ^{[1
]}

Ku, Nam-Joon ^{[1
]}

Han, Ji-Tai ^{[1
]}

Kim, Rae-Young ^{[1
]}

Hyun, Dong-Seok ^{[1
]}

机构：

[1] Hanyang Univ, Seoul 133791, South Korea

来源：

39TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY (IECON 2013) | 2013年

关键词：

Grid-connected; LCL filter; Multi-level inverter; Neutral-point-clamped inverter; Neutral-point voltage oscillation; Small-signal model;

D O I：

暂无

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Three-level Neutral-Point-Clamped inverter has inherent problem which is the neutral-point voltage fluctuation caused by the neutral-point current that flows into or out from the neutral-point. Even though the neutral point voltage is balanced with certain method, the oscillation of neutral point voltage is still remains due to the output phase current. If total capacitance of DC-link capacitor is smaller, the amplitude of oscillation is larger. In this paper, three-level neutral-point-clamped inverter system is analysed by the small-signal modeling and the control method reducing the oscillation of the neutral-point voltage is proposed. By the proposed method, the amplitude of the neutral-point voltage oscillation is reduced to almost zero. The validity of the proposed method is verified by the simulation and the experiment.

引用

页码：304 / 309

页数：6

共 12 条

[1]

Blaabjerg F, 2006, INT POWER ELECT MOT, P1

[2] A comprehensive study of neutral-point voltage balancing problem in three-level neutral-point-clamped voltage source PWM inverters [J].