Journal ArticleDOI
A Simplified Nearest Level Control (NLC) Voltage Balancing Method for Modular Multilevel Converter (MMC)
P. M. Meshram,Vijay B. Borghate +1 more
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TLDR
In this paper, a simplified nearest level control balancing method for modular multilevel converter is presented, which neither requires individual sorting of the submodule voltages nor the redundancy of the switching states.Abstract:
In this paper, a simplified nearest level control balancing method for modular multilevel converter is presented. The proposed method neither requires individual sorting of the submodule voltages nor the redundancy of the switching states. Once the sorting of the submodules is done on the basis of the number of the submodules to be switched on, the identifications of the submodules can be carried out throughout the stages of the implementation of the this method. The proposed method also does not require the individual submodule status in the gate pulse generation stage. The gate logic in the presented method can be implemented with the help of the switching states of the voltage levels. Those simplifications and removing of the some of the stages by the proposed balancing method may ease and lead to the less processor time at the implementation level. The pictorial presentation further helps in consolidating the understanding of the different stages of the method. Rigorous simulations are carried out for open and one of the prominent closed-loop applications, i.e., modular multilevel converter-based high-voltage direct current to demonstrate the validity and effectiveness of the proposed simplified balancing method under normal and emergency conditions.read more
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Journal ArticleDOI
Evolution of Topologies, Modeling, Control Schemes, and Applications of Modular Multilevel Converters
TL;DR: The development of MMC circuit topologies and their mathematical models over the years are presented and the evolution and technical challenges of the classical and model predictive control methods are discussed.
Journal ArticleDOI
A Square T-Type (ST-Type) Module for Asymmetrical Multilevel Inverters
TL;DR: In this paper, the authors proposed a new module for asymmetrical multilevel inverters with a low number of components, which is a square combination of two back-to-back T-type inverters and some other switches.
Journal ArticleDOI
A 13-Levels Module (K-Type) With Two DC Sources for Multilevel Inverters
TL;DR: A new reconfiguration module for asymmetrical multilevel inverters in which the capacitors are used as the dc links to create the levels for staircase waveforms and makes the inherent creation of the negative voltage levels without any additional circuit.
Journal ArticleDOI
Analysis of Resonance Between a VSC-HVDC Converter and the AC Grid
TL;DR: In this paper, an impedance-based stability analysis model considering different equipment is first established, and then the resonance is analyzed and repeated in the simulation based on the established model, the system stability can be judged by the ratio of grid impedance to the equivalent impedance of all parallel-connected equipment with the converter.
Journal ArticleDOI
Robust Vector Control of a Very Weak-Grid-Connected Voltage-Source Converter Considering the Phase-Locked Loop Dynamics
TL;DR: In this paper, a robust vector-controlled VSC that facilitates full converter power injection at weak and very weak-grid conditions is presented, and a detailed dynamic model for the ac-bus voltage dynamics, including the phase-locked loop (PLL), is developed and validated.
References
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Journal ArticleDOI
Multilevel inverters: a survey of topologies, controls, and applications
TL;DR: The most important topologies like diode-clamped inverter (neutral-point clamped), capacitor-Clamped (flying capacitor), and cascaded multicell with separate DC sources are presented and the circuit topology options are presented.
Journal ArticleDOI
Recent Advances and Industrial Applications of Multilevel Converters
Samir Kouro,Mariusz Malinowski,K. Gopakumar,Josep Pou,Leopoldo G. Franquelo,Bin Wu,Jose Rodriguez,Marcelo A. Perez,Jose I. Leon +8 more
TL;DR: This paper first presents a brief overview of well-established multilevel converters strongly oriented to their current state in industrial applications to then center the discussion on the new converters that have made their way into the industry.
Proceedings ArticleDOI
An innovative modular multilevel converter topology suitable for a wide power range
A. Lesnicar,Rainer Marquardt +1 more
TL;DR: In this article, a new multilevel converter topology suitable for very high voltage applications, especially network interties in power generation and transmission, is presented, and a suitable structure of the converter-control is proposed.
Journal ArticleDOI
Multilevel Voltage-Source-Converter Topologies for Industrial Medium-Voltage Drives
TL;DR: This paper covers the high-power voltage-source inverter and the most used multilevel-inverter topologies, including the neutral-point-clamped, cascaded H-bridge, and flying-capacitor converters.
Journal ArticleDOI
A Survey on Cascaded Multilevel Inverters
TL;DR: A survey of different topologies, control strategies and modulation techniques used by cascaded multilevel inverters in the medium-voltage inverter market is presented.
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