Title :
A Simple Space Vector PWM Scheme to Operate a Three-Level NPC Inverter at High Modulation Index Including Overmodulation Region, With Neutral Point Balancing
Author :
Gupta, Amit Kumar ; Khambadkone, Ashwin M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore
Abstract :
Three-level neutral point clamped (NPC) inverter is a widely used topology of multilevel inverters. However, the neutral point fluctuates for certain switching states. At low modulation index, the fluctuations can be compensated using redundant switching states. But, at higher modulation index and in overmodulation region, the neutral point fluctuation deteriorates the performance of the inverter. This paper proposes a simple space vector pulsewidth modulation scheme for operating a three-level NPC inverter at higher modulation indexes, including overmodulation region, with neutral point balancing. Experimental results are provided
Keywords :
PWM invertors; network topology; switching convertors; modulation index; multilevel inverter topology; neutral point balancing; overmodulation region; pulse width modulation; redundant switching states; space vector PWM scheme; switching states; thee-level neutral point clamped inverter; Acceleration; Capacitors; Fluctuations; Industry Applications Society; Pulse inverters; Pulse modulation; Pulse width modulation inverters; Space vector pulse width modulation; Topology; Voltage; Modulation index; neutral point balancing; overmodulation; space vector pulsewidth modulation (SVPWM); three-level neutral point clamped (NPC) inverter;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2007.895766
