Title :
A comprehensive study of neutral-point voltage balancing problem in three-level neutral-point-clamped voltage source PWM inverters
Author :
Celanovic, Nikola ; Borojevic, Dusan
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
This paper explores the fundamental limitations of neutral-point voltage balancing problem for different loading conditions of three level voltage source inverters. A new model in DQ coordinate frame utilizing current switching functions is developed, as a means to investigate theoretical limitations and lend more intuitive insight into the problem. The low frequency ripple of the neutral point caused by certain loading conditions is observed and quantified
Keywords :
PWM power convertors; switching circuits; DQ coordinate frame; current switching functions; loading conditions; low frequency ripple; neutral-point voltage balancing; neutral-point-clamped voltage source PWM inverters; three level voltage source inverters; three-level PWM inverters; Circuits; Frequency; Magnetic separation; Power electronics; Power harmonic filters; Power semiconductor devices; Power semiconductor switches; Pulse width modulation inverters; Topology; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-5160-6
DOI :
10.1109/APEC.1999.749733
