A simple space vector PWM scheme with neutral point balancing for three-level neutral point clamped inverter

Author

Ko, Yoon-Hyuk ; Park, Byoung-Gun ; Kim, Rae-young ; Hyun, Dong-seok ; Jung, Ha-Jin

Author_Institution

Dept. of Electr. Eng., Hanyang Univ., Seoul, South Korea

fYear

2011

fDate

9-13 Oct. 2011

Firstpage

1

Lastpage

6

Abstract

Three-level neutral-point diode-clamped (NPC) multi-level inverter has been known as a superior topology of inverters. However, this topology method has an inherent problem of the neutral point potential variation. In this paper, a simple control scheme based on the unified voltage modulation technique has been proposed to balance the neutral-point voltage of three-level NPC inverter. The proposed scheme has been achieved by the calculated off-set voltage including the neutral point balancing factor. The neutral point fluctuation can be simply compensated without additional efforts and easily applied to the unified voltage modulation. The validity of the proposed scheme has been proven through the simulation and experiments results.

Keywords

PWM invertors; control scheme; inverter topology; neutral point fluctuation; neutral point potential variation; neutral point voltage balancing factor; offset voltage; space vector PWM scheme; three level NPC inverter; three level neutral point clamped multilevel inverter; unified voltage modulation technique; IP networks; Indium phosphide; Modulation; Passive optical networks; Switches; Vectors; Multi-level inverter; NPC inverter; Neutral Point Balancing; Space Vector PWM;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting (IAS), 2011 IEEE

Conference_Location

Orlando, FL

ISSN

0197-2618

Print_ISBN

978-1-4244-9498-9

Type

conf

DOI

10.1109/IAS.2011.6074330

Filename

6074330