Optimized Carrier Disposition Based Discontinuous Pulse-width Modulation Method for three-level NPC Converters

Wang, Meiqi; Xu, Lie; Yang, Bo; Li, Jing; Gu, Chunyang; Zhang, He; Gerada, Chris; Li, Yongdong

Abstract

Three level neutral-point-clamped (3L-NPC) converter is a multilevel topology that is well-suited solution in high voltage, high frequency applications such as flexible AC transmission systems and electric vehicle drive systems. This paper is focused on a silicon carbon (SiC) based 3L-NPC for high frequency application which presents a higher switching loss and aging mismatch. In this paper, a new improved approach of the discontinuous pulse width modulation (DPWM) of 3L-NPC based on carrier disposition is presented. Based on the relationship between switching loss and power factor angle, an optimized DPWM method with minimum switching loss is proposed. The simulation and experimental results show how the optimized carrier disposition based discontinuous pulse-width modulation (OCD-DPWM) is achieved whereas the switching loss is reduced and the system efficiency is improved.

• Conference Name: IEEE Energy Conversion Congress and Exposition (ECCE 2019 )
• Conference Location: Baltimore, MD, USA
• Start Date: Sep 29, 2019
• End Date: Oct 3, 2019
• Acceptance Date: May 3, 2019
• Online Publication Date: Nov 28, 2019
• Publication Date: 2019-09
• Deposit Date: Mar 16, 2020
• Publicly Available Date: Mar 20, 2020
• Pages: 1442-1446
• Series ISSN: 2329-3748
• Book Title: 2019 IEEE Energy Conversion Congress and Exposition (ECCE)
• ISBN: 978-1-7281-0396-9
• DOI: https://doi.org/10.1109/ECCE.2019.8912600
• Public URL: https://nottingham-repository.worktribe.com/output/4154728
• Publisher URL: https://ieeexplore.ieee.org/document/8912600
• Additional Information: © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.