Design and simulation of a modular multi-level converter for MVDC application

Mondal, Gopal; Critchley, Roger; Hassan, Fainan; Crookes, Will

doi:10.1109/isie.2011.5984157

Cited by 20 publications

(8 citation statements)

References 12 publications

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“…The Modular Multilevel Converter (MMC) has drawn attention due to its advantages of modular design, high efficiency and scalability, and excellent output waveform with low harmonic distortion, etc. [1][2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Design and Operation of a Hybrid Modular Multilevel Converter

Zeng

Yao

et al. 2015

IEEE Trans. Power Electron.

386

238

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This paper presents a hybrid Modular Multilevel Converter (MMC), which combines full-bridge sub-modules (FBSM) and half-bridge sub-modules (HBSM). Compared with the FBSM based MMC, the proposed topology has the same dc fault blocking capability but uses fewer power devices hence has lower power losses. To increase power transmission capability of the proposed hybrid MMC, negative voltage states of the FBSMs are adopted to extend the output voltage range. The optimal ratio of FBSMs and HBSMs, and the number of FBSMs generating a negative voltage state are calculated to ensure successful dc fault blocking and capacitor voltage balancing. Equivalent circuits of each arm consisting of two individual voltage sources are proposed and two-stage selecting and sorting algorithms for ensuring capacitor voltage balancing are developed. Comparative studies for different circuit configurations show excellent performance balance for the proposed hybrid MMC, when considering dc fault blocking capability, power losses, and device utilization. Experimental results during normal operation and dc fault conditions demonstrate feasibility and validity the proposed hybrid MMC.

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Section: Introductionmentioning

confidence: 99%

“…The basic building block in a MMC is a sub-module (SM). The half-bridge based SM (HBSM) has been the main configuration in the MMC [1][2][3][4][5][6][7]. However, a HBSM based MMC (HB-MMC) does not have dc fault blocking capability, thus relies on ac or dc circuit breakers to isolate dc faults [13][14].…”

Section: Introductionmentioning

confidence: 99%

Design and Operation of a Hybrid Modular Multilevel Converter

Zeng

Yao

et al. 2015

IEEE Trans. Power Electron.

386

238

View full text Add to dashboard Cite

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“…3 overcomes many of the abovementioned shortcomings, but at the expense of a twice as many semiconductors and a very large amount of distributed capacitances. Recent research has indicated the advantages of combining the features of the two-level converter and that of the MMC, and thus introducing a new hybrid family of VSC-HVDC topologies [16], [49], [50], [51], [52], [53].…”

Section: B Alstom's Maxsine Hvdcmentioning

confidence: 99%

“…There exist fundamentally two HVDC technologies: (i) The conventional thyristor-based line commutated converter (LCC) HVDC, which is a well proven technology, with the first application in 1954 in Gotland [13]. (ii) VSC-HVDC, which is a relatively new technology, which is under rapid development [14], [15], [16]. The VSC technology was initially developed for drive technologies [17].…”

Section: Introductionmentioning

confidence: 99%

Review on multi-level voltage source converter based HVDC technologies for grid connection of large offshore wind farms

Glasdam

Hjerrild

Kocewiak

et al. 2012

2012 IEEE International Conference on Power System Technology (POWERCON)

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This paper focuses on reviewing grid connection of large offshore wind farms (OWFs) employing current state-ofthe-art voltage source converter based high voltage direct current (VSC-HVDC) technologies. A brief review of the VSC-HVDC evolvement is given followed by an overview of the advantages of employing VSC-HVDC for grid connection of large OWFs located remote from shore. A detailed description of the topologies is given and simulation results are presented in order to illustrate some of the main features of the most popular multilevel VSC-HVDC topology.Based on the review it is found that there are currently three vendors of the VSC-HVDC. Furthermore, it is found that the VSC-HVDC is a promising technology for grid connection of remote located OWFs and is going to be the preferred choice for remote located OWF grid connection in e.g. the UK.

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“…Modular Multilevel Converter (MMC) is a new form of multilevel converter and it is a big improvement in this area especially for interconnection of High Voltage DC (HVDC) transmission system and large wind farms [3]. Regarding to the many control complexities in MMC due to modularity, high number of sub modules parameters and limitation of measurements of all voltages and currents, some control strategies have been present by literatures which are categorized as control strategies of MMC for submodule (SM) voltage balancing [4][5], circulating current suppressing [6][7] and AC side current control for grid connected application [8]. In most presented works, the analysis of MMC during unbalanced grid conditions has not been investigated.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Control Structure of Grid Connected Modular Multilevel Converters

Hajizadeh¹,

Norum

Shal

2024

RE&PQJ

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This paper implements nonlinear control structure based on Adaptive Fuzzy Sliding Mode (AFSM) Current Control and Unscented Kalman Filter (UKF) to estimate the capacitor voltages from the measurement of arm currents of Modular Multilevel Converter (MMC). UKF use nonlinear unscented transforms in the prediction step in order to preserve the stochastic characteristics of a nonlinear system. In order to design adaptive robust control strategy and nonlinear observer, mathematical model of MMC using rotating d-q theory has been used. Digital time-domain simulation studies are carried out in the Matlab/Simulink environment to verify the performance of the overall proposed control structure during different case studies.

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Design and simulation of a modular multi-level converter for MVDC application

Cited by 20 publications

References 12 publications

Design and Operation of a Hybrid Modular Multilevel Converter

Design and Operation of a Hybrid Modular Multilevel Converter

Review on multi-level voltage source converter based HVDC technologies for grid connection of large offshore wind farms

Nonlinear Control Structure of Grid Connected Modular Multilevel Converters

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