Title :
A VSC transmission system using flying capacitor multilevel converters and selective harmonic elimination PWM control
Author :
Xu, Lie ; Agelidis, Vassilios G.
Author_Institution :
Sch. of Electr. & Electron. Eng., Queen´´s Univ., Belfast
fDate :
Nov. 29 2005-Dec. 2 2005
Abstract :
A transmission system based on voltage-source three-level flying capacitor (FC) multilevel converters with selective harmonic elimination pulse-width modulation (SHE-PWM) control is presented in this paper. The generation of the switching patterns for each power device is described taking into account the natural balancing of the FC voltages. A new and simple control method for balancing the FC voltages of the FC converter when using SHE-PWM is proposed which is based on the small change of the firing angle according to the load current polarity. Implementation of the SHE-PWM with capacitor voltage balancing is provided. Simulation studies for a 300 MW/plusmn150 kV transmission system are presented to confirm the satisfactory performance of the proposed system
Keywords :
PWM power convertors; harmonics suppression; power capacitors; transmission networks; 150 kV; 300 MW; VSC transmission system; capacitor voltage balancing; flying capacitor multilevel converters; load current polarity; pulse-width modulation; selective harmonic elimination PWM control; voltage balancing; voltage source converters; Capacitors; Control systems; HVDC transmission; Insulated gate bipolar transistors; Power conversion; Power engineering and energy; Power generation; Pulse width modulation; Pulse width modulation converters; Voltage control; VSC transmission; flying capacitor converte; selective harmonic elimination PWM; voltage balancing;
Conference_Titel :
Power Engineering Conference, 2005. IPEC 2005. The 7th International
Conference_Location :
Singapore
Print_ISBN :
981-05-5702-7
DOI :
10.1109/IPEC.2005.207085
