Analysis and elimination of third harmonic oscillation in capacitor voltages of 3-level voltage source converters

Author

Mohaddes, M. ; Brandt, D.P. ; Sadek, K.

Author_Institution

Brandt Consultants, Winnipeg, Man., Canada

Volume

2

fYear

2000

fDate

2000

Firstpage

737

Abstract

Capacitor voltages on the DC side of a three-level voltage source power converter must be equal in order to avoid excessive harmonic generation and voltage stresses on the power converter valves. This paper analyses a particular type of capacitor voltage imbalance: the steady-state third harmonic oscillation where the two capacitor voltages are 180° out of phase and the total DC voltage remains constant. A method to eliminate this harmonic for converters used in DC power transmission is suggested and its effectiveness is confirmed by digital simulation

Keywords

HVDC power transmission; harmonic analysis; harmonic distortion; harmonics suppression; power conversion harmonics; DC power transmission; DC voltage; capacitor voltages; digital simulation; harmonic generation; steady-state third harmonic oscillation; third harmonic oscillation analysis; third harmonic oscillation elimination; three-level voltage source power converters; voltage stresses; Capacitors; Digital simulation; Frequency conversion; Harmonic analysis; Power system harmonics; Power transmission; Steady-state; Stress; Valves; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Society Summer Meeting, 2000. IEEE

Conference_Location

Seattle, WA

Print_ISBN

0-7803-6420-1

Type

conf

DOI

10.1109/PESS.2000.867442

Filename

867442