Majdee, Tohtayong

Mashkuri, Yaacob

Musse Muhamud, Ahmed

Nur Shahida, Midi

Sheroz, Khan

Siti Hajar, Yusoff

Unimas Institutional Repository

IIUM Engineering Journal, Vol. 19, No. 2, 2018 Tohtayong et al. 43 WIDE RANGE MODULATION INDEXES FEATURING CARRIER-BASED PWM STEPPED WAVEFORM FOR HALF-BRIDGE MODULAR MULTILEVEL CONVERTERS MAJDEE TOHTAYONG1*, SHEROZ KHAN2, MASHKURI YAACOB2,  SITI HAJAR YUSOFF2, NUR SHAHIDA MIDI2 AND MUSSE MUHAMUD AHMED3 1Department of Electrical Engineering, Faculty of Engineering,  Princess of Naradhiwas University, 99, Khokkhian, Muang, Narathiwat 96000, Thailand. 2Department of Electrical and Computer Engineering, Kulliyah of Engineering, International Islamic University Malaysia,  PO Box 10, 50728 Kuala Lumpur, Malaysia. 3Department of Electrical and Electronic Engineering, Faculty of Engineering,  Universiti Malaysia Sarawak,  Kota Samarahan, 94300 Sarawak, Malaysia. *Corresponding  author: powerelectronics911@hotmail.com   (Received: 12th  Dec 2016; Accepted: 5th  June 2018; Published on-line: 1st  Dec 2018) https://doi.org/10.31436/iiumej.v19.i2.788 ABSTRACT: This paper presents simulation results of the influence of wide range modulation index values ( am ) in carrier-based PWM strategy for application in generatingthe stepped waveform. The waveform is tested for application in single-phase half-bridge modular multilevel converters (MMCs) topology. The results presented in this paper include a variation of the fundamental component (50 Hz) in the voltage output.  It also studies total harmonic distortion of the output voltage (THDv) and the output current (THDi) when the modulation index is changed over the linear-modulation region, 0 < am< 1. It also explores the effect of a modulation index greater than 1. Moreover, different output voltage shapes, as a consequence of varied am on MMCs, are also illustrated forshowing the effect of varying the value of am on sub-module of MMCs.ABSTRAK: Penulisan ini berkenan simulasi pengaruh pelbagai nilai indeks modulasi     (am ) dalam strategi PWM berasaskan aplikasi dalam menghasilkan bentuk gelombangyang bertingkat. Bentuk gelombang ini diuji untuk aplikasi dalam topologi MMCs.Penilaian dan hasil dari artikle ini termasuk variasi komponen asas (50 Hz) dalam voltan keluar. Ia juga meneliti jumlah penyelarasan harmonik voltan keluar (THDv) dan arus keluaran (THDi) apabila indeks modulasi ditukar dalam rantau modulasi linear, 0 < am <1. Ia juga meneroka kesan indeks modulasi lebih daripada 1. Selain itu, bentukvoltan keluar yang berbeza sebagai akibat dari pelbagai am  pada MMCs juga digambarkanuntuk menunjukkan kesan berbeza-beza nilai am  pada sub-modul MMCs.KEYWORDS: PWM; converter; stepped waveform; MMC; THD 

Wide range modulation indexes featuring carrier-based PWM Stepped waveform for half-bridge modular multilevel Converters

http://ir.unimas.my/id/eprint/25580/1/WIDE%20RANGE%20MODULATIONINDEXES%20%28abstract%29.pdf

Wide range modulation indexes featuring carrier-based PWM Stepped waveform for half-bridge modular multilevel Converters

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