Title :
A comprehensive study of neutral-point voltage balancing problem in three-level neutral-point-clamped voltage source PWM inverters
Author :
Celanovic, Nikola ; Boroyevich, Dushan
Author_Institution :
Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
fDate :
3/1/2000 12:00:00 AM
Abstract :
This paper explores the fundamental limitations of the neutral-point voltage balancing problem for different loading conditions of three-level voltage source inverters. A new model in the DQ coordinate frame utilizing current switching functions is developed as a means to investigate theoretical limitations and to offer a more intuitive insight into the problem. The low-frequency ripple of the neutral point caused by certain loading conditions is reported and quantified
Keywords :
DC-AC power convertors; PWM invertors; load (electric); switching circuits; DQ coordinate frame model; current switching functions; loading conditions; low-frequency ripple; neutral-point voltage balancing; three-level neutral-point-clamped voltage source PWM inverters; Application software; Capacitors; Magnetic separation; Power semiconductor devices; Power semiconductor switches; Pulse width modulation; Pulse width modulation inverters; Switching frequency; Topology; Voltage;
Journal_Title :
Power Electronics, IEEE Transactions on
