Title :
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
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;
Conference_Titel :
Power Engineering Society Summer Meeting, 2000. IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-6420-1
DOI :
10.1109/PESS.2000.867442
