Lifetime and reliability improvements in modular multilevel converters using controlled circulating current
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Power Electronics"
DOI: 10.1007/s43236-021-00297-7
Abstract: Circulating current has been an inherent feature of modular multilevel converters (MMC), which results in second-order harmonics on the arms currents. If not properly controlled, the circulating current can affect the lifetime and reliability of… read more here.
Keywords: modular multilevel; circulating current; controlled circulating; multilevel converters ... See more keywords
Model‐based strategy for open‐circuit faults diagnosis in n ‐level CHB multilevel converters
Sign Up to like & getrecommendations! Published in 2019 at "IET Power Electronics"
DOI: 10.1049/iet-pel.2018.5478
Abstract: Here, the authors study open-circuit faults (OCFs) in the power switches of multilevel converters with a model-based perspective. In specific, the authors address single-phase cascaded H-bridge (CHB) converters with n -levels in its output voltage… read more here.
Keywords: circuit faults; model based; open circuit; multilevel converters ... See more keywords
New modulation scheme and voltage balancing control of modular multilevel converters for modern electric ships
Sign Up to like & getrecommendations! Published in 2019 at "IET Power Electronics"
DOI: 10.1049/iet-pel.2018.6362
Abstract: The distinctive features such as fault-tolerability, modularity, power and voltage scalability have propelled modular multilevel converters (MMCs) as one of the emerging power converter topologies for marine applications. Pulse-width modulation (PWM) schemes are widely used… read more here.
Keywords: voltage balancing; control; voltage; scheme ... See more keywords
Three‐level PN cell for multilevel converters
Sign Up to like & getrecommendations! Published in 2020 at "Iet Power Electronics"
DOI: 10.1049/iet-pel.2019.0559
Abstract: Multilevel converters rely on plurality of DC capacitors switched in specific patterns to obtain the necessary output voltage level. Modular multilevel converter, flying capacitor converter (FLC) and neutral point clamped (NPC) converters require complex control… read more here.
Keywords: voltage; multilevel; multilevel converters; three level ... See more keywords
Predictive Nearest-Level Control Algorithm for Modular Multilevel Converters With Reduced Harmonic Distortion
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Access"
DOI: 10.1109/access.2020.3048156
Abstract: Owing to the low number of submodules (SMs) in modular multilevel converters (MMCs), especially in medium-voltage applications, the output current and voltage generated by conventional nearest-level control (NLC) methods contain evident distortions. Previously, various hybrid… read more here.
Keywords: control; voltage; level; modular multilevel ... See more keywords
Universal Equivalent Model for Real-Time CPU/FPGA Co-Simulation of Hybrid Cascaded Multilevel Converters
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Access"
DOI: 10.1109/access.2023.3235272
Abstract: Real-time simulation is important for ensuring the reliable operation of VSC-HVDC converters in power grids, particularly through the use of rapid control prototyping (RCP) and hardware-in-the-loop (HIL) based converter controllers. While real-time simulation is a… read more here.
Keywords: time; multilevel converters; real time; equivalent model ... See more keywords
Study and Comparison of Discontinuous Modulation for Modular Multilevel Converters in Motor Drive Applications
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Transactions on Industrial Electronics"
DOI: 10.1109/tie.2018.2847621
Abstract: Discontinuous modulation applied to modular multilevel converters is an effective method for reducing the capacitor voltage ripples. In this paper, the discontinuous modulation is adapted and used in a motor drive application. For proper operation… read more here.
Keywords: modulation; modular multilevel; multilevel converters; discontinuous modulation ... See more keywords
Fault-Tolerant Space Vector Modulation for Modular Multilevel Converters With Bypassed Faulty Submodules
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Transactions on Industrial Electronics"
DOI: 10.1109/tie.2018.2860518
Abstract: This paper develops a modulation based fault-tolerant (FT) strategy for restoring the operation of three-phase modular multilevel converters (MMCs) with faulty switches. This FT strategy is based on a proposed modified space vector modulation (SVM)… read more here.
Keywords: fault tolerant; space vector; strategy; modulation ... See more keywords
A Unified Startup Strategy for Modular Multilevel Converters With Deadbeat Predictive Current Control
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Industrial Electronics"
DOI: 10.1109/tie.2020.3007080
Abstract: Modular multilevel converters (MMCs) are very promising and attractive in medium-/high-voltage applications. One of the main technical challenges associated with MMCs is to precharge all submodule (SM) capacitors to their nominal voltage values during a… read more here.
Keywords: deadbeat predictive; predictive current; startup strategy; strategy ... See more keywords
Enhancing the Reliability of Modular Multilevel Converters Using Neutral Shift
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Power Electronics"
DOI: 10.1109/tpel.2017.2695327
Abstract: This letter presents an approach for modular multilevel converters that enables a stable operation with failed nonredundant modules. This is achieved by using a neutral shift with a dedicated power feed-forward control. The feasibility of… read more here.
Keywords: using neutral; modular multilevel; neutral shift; multilevel converters ... See more keywords
Modular Multilevel Converters: Control and Applications
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DOI: 10.3390/en10111709
Abstract: This review article is mainly oriented to the control and applications of modular multilevel converters (MMC). The main topologies of the switching modules are presented, for normal operation and for the elimination of DC faults.… read more here.
Keywords: voltage; modular multilevel; multilevel converters; control applications ... See more keywords