Development of modulation strategies for NPC converter addressing DC link voltage balancing and CMV reduction

Author

Boian, Daniela ; Biris, Ciprian ; Teodorescu, Remus ; Sztykiel, Michal

Author_Institution

Dept. of Energy Technol., Aalborg Univ., Aalborg, Denmark

fYear

2012

fDate

25-28 June 2012

Firstpage

828

Lastpage

835

Abstract

3L-NPC inverters are more popular due to their superior performance compared with two level inverters. One of the most optimal applications for multilevel inverter is the Adjustable Speed Drives (ASD). The industry reported numerous ASD failures due to high frequency PWM. Those failures consist in insulation breakdown and bearing failures. By the use of this type of converters, both Electromagnetic Interference (EMI) and harmonic distortions are improved. This paper proposes two modulation strategies for Three Level Neutral Point Clamped Converter (3L-NPC). The main focus of these modulation strategies is to reduce the Common Mode Voltage (CMV) and balance the DC Link Voltage.

Keywords

electromagnetic interference; invertors; power convertors; variable speed drives; 3L-NPC inverters; ASD failures; CMV reduction; DC link voltage balancing; NPC converter; adjustable speed drives; bearing failures; common mode voltage; electromagnetic interference; harmonic distortions; insulation breakdown; multilevel inverter; three level neutral point clamped converter; Capacitors; Inverters; Pulse width modulation; Switches; Variable speed drives; Vectors; 3L-NPC Converter; CMV Reduction; DC Link Balancing; Modulation Strategies; Multilevel; SVM;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics for Distributed Generation Systems (PEDG), 2012 3rd IEEE International Symposium on

Conference_Location

Aalborg

Print_ISBN

978-1-4673-2021-4

Electronic_ISBN

978-1-4673-2022-1

Type

conf

DOI

10.1109/PEDG.2012.6254097

Filename

6254097