Abstract: This study presents different technologies and topologies of medium-voltage (MV) drives available on the market. The carriers above and below zero reference line are in same phase. If all the carriers are selected with the same phase, the method is known as Phase Disposition (PD) method. In this paper, four multilevel Pulse width-modulation methods; phase disposition (PD), switching-loss minimization (SLM), and selective harmonic elimination (SHE) up to the 17th and 29th harmonics, respectively, are considered. The characteristics of long-cable effects on common mode voltage (CMV) and differential-mode voltage (DMV), inverter losses and efficiency, induction machine voltage, and current harmonics are analyzed. MATLAB/Simulink for control systems are experimentally verified with a 1000-hp 4160-V neutral-point-clamped adjustable speed-drive system that includes a 24-pulse front-end voltage source converter.
Keywords: Harmonics, multilevel pulse width modulation, power quality, three-level neutral-point-clamped medium-voltage drives.
Title: MATLAB Based Simulation & Analysis of Nine Level NPC Multilevel Inverter Applied to Induction Machine Drive
Author: V.S R.V CHINNA RAO, B. GANGA RAJU
International Journal of Electrical and Electronics Research
ISSN 2348-6988 (online)
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