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Title: Novel active nested neutral-point piloted nine-level converter
Authors: Ahmed S. Hussein
Amer Mohammad Yusuf Mohammad Ghias
Keywords: Engineering::Electrical and electronic engineering::Power electronics
Issue Date: 2019
Source: Ahmed S. Hussein & Amer Mohammad Yusuf Mohammad Ghias (2019). Novel active nested neutral-point piloted nine-level converter. 2019 IEEE Energy Conversion Congress and Exposition (ECCE), 3631-3636.
metadata.dc.contributor.conference: 2019 IEEE Energy Conversion Congress and Exposition (ECCE)
Abstract: This paper presents a new nine-level converter and its modulation for the medium- and high-voltage applications. The converter's topology is based on the combination of the five-level active neutral-point-clamped (ANPC) and the neutral-point piloted (NPP) converters and is called the Nine-Level Active Nested Neutral-Point Piloted converter. The converter consist of three flying capacitors (FCs) per phase, which can be maintained at a nominal reference voltage using the converter's redundant switching states. The proposed modulation is based on a phase-disposition pulse width modulation (PD-PWM) that incorporates a minimum energy property cost function along with a dynamic reference generation technique to improve the FCs voltage and the converter's performance. Both the steady-state and transient performance of the converter have been investigated. The results indicate a high-quality output waveform and a sufficient capacitor voltage balancing control that guarantees a safe operation of the proposed converter. Additionally, the dc-link capacitor voltage ripple has been analyzed for all modulation indices and load power factors. The analysis shows a significant increase in the voltage ripple at high modulation indices.
ISBN: 9781728103952
DOI: 10.1109/ECCE.2019.8912212
Schools: School of Electrical and Electronic Engineering 
Research Centres: Centre for system intelligence and efficiency (EXQUISITUS) 
Rights: © 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. The published version is available at:
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Conference Papers

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