Submodule fault-tolerant control based adaptive carrier-PDPWM for modular multilevel converters

Elsanabary, Ahmed and Hashfi, Tuanku Badzlin and Mekhilef, Saad and Seyedmahmoudian, Mehdi and Stojcevski, Alex (2021) Submodule fault-tolerant control based adaptive carrier-PDPWM for modular multilevel converters. Energy Reports, 7. pp. 7288-7296. ISSN 2352-4847, DOI

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The modular multilevel converter (MMC) is considered a very promising candidate for medium-voltage and/or high-power grids. One of the major concerns in half-bridge MMCs, especially with large number of levels, is the fault occurs at the converter submodule (SM). Hence, an appropriate control with an SM fault tolerance of the MMC is required to enhance its reliability. This paper addresses the issue and proposes a fault tolerant control-based adaptive carrier phase disposition pulse width modulation (AC-PDPWM) technique for MMCs with superior symmetrical and asymmetrical fault-tolerant capabilities. The proposed control-based AC-PDPWM acts to regulate the flow of energy between arms, rebalance the SM capacitors, and redistribute the pulses to the SM switches. In this study, a single-phase grid connected MMC having both symmetrical and asymmetrical fault conditions is investigated. Compared with other control methods, the proposed control can tolerate the SM fault conditions without requiring redundant SMs or additional computational burden, which decreases the cost and volume of the MMC design and simplifies its control. Simulation and experimental results are included to verify the fault-tolerant capability of the proposed control. (C) 2021 The Authors. Published by Elsevier Ltd.

Item Type: Article
Funders: Ministry of Education, Malaysia (LRGS/1/2019/UKM-UM/01/6/3)
Uncontrolled Keywords: Modular multilevel converter (MMC); Fault-tolerant control; Modulation technique; Energy control
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering > Department of Electrical Engineering
Depositing User: Ms Zaharah Ramly
Date Deposited: 20 Jul 2022 02:00
Last Modified: 20 Jul 2022 02:00

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