Modular multilevel converter modelling, control and analysis under grid frequency deviations

Sztykiel, Michal; Silva, Rodrigo da; Teodorescu, Remus; Zeni, Lorenzo; Helle, Lars; Kjær, P.C.

doi:10.1109/epe.2013.6634747

Cited by 15 publications

(8 citation statements)

References 6 publications

(4 reference statements)

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“…This may lead to a circulating current between the legs which needs to be minimized by installing an inductor in each arm. The details about how to design different component of a MMC are mentioned in [27]. Fig.…”

Section: Sparse Ac/ac Modular Multilevel Convertermentioning

confidence: 99%

Sparse AC/AC Modular Multilevel Converter

Alaei

Khajehoddin

2016

IEEE Trans. Power Delivery

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A new bidirectional multilevel converter topology called Sparse Modular Multilevel Converter suitable for high power AC/AC applications is presented. The proposed topology has less number of IGBT switches and capacitors compared with conventional approaches. Moreover, a salient feature of the proposed topology is that more than half of the switches are operating in soft switching condition, which considerably decreases the switching losses of the converter. The theoretical calculations and simulation results are provided to verify the feasibility of the proposed topology.Index Terms-High power AC/AC converter, modular multilevel converter, zero-voltage switching. 0885-8977 (c)

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Section: Sparse Ac/ac Modular Multilevel Convertermentioning

confidence: 99%

Sparse AC/AC Modular Multilevel Converter

Alaei

Khajehoddin

2016

IEEE Trans. Power Delivery

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“…Still, multilevel converter implementation is concentrated in high power, high voltage applications like high voltage DC (HVDC), medium voltage (MV) motor drives, and offshore wind turbine [6], [7]. To an extent this can be attributed to requirement of complex charge balancing algorithms alongwith additional voltage sensing and digital signal processor (DSP) per sub-module to maintain capacitor charge in multilevel topologies [9]. Furthermore, aforementioned multilevel topologies cannot be directly interfaced to renewable sources like photovoltaic (PV) panel, fuel cell or battery storage applications.…”

Section: Introductionmentioning

confidence: 99%

Daisy Chain PN Cell for Multilevel Converter using GaN for High Power Density

Ahmad

Jørgensen

Bęczkowski

et al. 2020

2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)

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Power semiconductor devices are achieving high switching speed and high breakdown voltage. This improves inverter performance. But, as inverter improves, further challenge of dv/dt noise is generated that needs to be tackled by filter stage. Multilevel inverters can solve this challenge. But there are implementation complexity associated with multilevel topologies like requirement of multiple isolated DC source, complicated charging algorithm, dedicated sensing hardware. This paper presents a switch capacitor type converter topology enabling a DC-AC three level output. Joining multiple iterations of topology in daisychained configuration, the converter can achieve voltage gain with multilevel waveform. Requirement of a single DC supply, with inherent charge balancing capability on capacitor, the topology is well suited for low voltage renewable sources like photovoltaic (PV) or fuel cell. The paper presents design of high frequency commutation loop. Utilizing finite element analysis (FEA) tool ANSYS Electronics Desktop (Q3D) to extract PCB parasitics helps in eliminating prototyping cost and time. Designed inverter is then subjected to continuous load test where it shows improving performance with increasing inductive load.

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“…MMC contains low voltage switches and offering the low harmonic distortions. Now a days, MMC [7] - [9] based HVDC systems are used for transmitting the power up to GW range. MMC is also have some drawbacks, i.e more number of IGBT switches can operate under hard switching mode and circulating current is also more.…”

Section: Introductionmentioning

confidence: 99%

Simulation of 7- Level AC–AC Sparse Modular Multilevel Converter

Rao¹,

Mayuri.²

2018

IJEAS

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7-level AC-AC Sparse modular multilevel converter (SMMC) is proposed in this paper. It is a bi-directional multilevel converter and it is employed in high power and high voltage applications. It contains full bridge and half bridge SM's on the middle arm, and low frequency converters on each side of the converter. In this converter more number of IGBT switches can work under soft switching mode. Control scheme is also proposed in this paper, it is utilized to obtain the capacitor voltage balancing. Capacitor voltages have some oscillations, harmonics will be decreased by applying modified PWM technique. Number of levels of the converter increases, voltage harmonics will be decreased and also switching frequency of the full bridge and half bridge arm IGBTs is decrease. The appropriateness of the 7-level AC/AC SMMC with Control scheme will be estimated by utilizing the MATLAB/SIMULINK software. Index Terms-7-level AC/AC SMMC, Control design, Capacitor voltage balancing, Modified PWM technique. M. Anka Rao received M.Tech degree in power and industrial drives from JNTU College of engineering and technology, Anantapur in the year 2010. He is currently working as an Assistant professor in electrical and electronics department in JNTU College of engineering & technology, Anantapur. He awarded a B.Tech degree in Electrical and Electronics Engineering from Andhra University in the year 2006. He is currently working towards the Ph.D degree in power and industrial drives at JNTU college of Engineering & technology, Anantapur. R. Mayuri received B.Tech degree in Electrical and Electronics Engineering from Rajeev Gandhi Memorial College of Engineering and Technology, Nandyala in the year 2016. She is currently working towards the M.Tech degree in Power and Industrial Drives in JNTU College of Engineering & Technology, Ananatapur.

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Modular multilevel converter modelling, control and analysis under grid frequency deviations

Cited by 15 publications

References 6 publications

Sparse AC/AC Modular Multilevel Converter

Sparse AC/AC Modular Multilevel Converter

Daisy Chain PN Cell for Multilevel Converter using GaN for High Power Density

Simulation of 7- Level AC–AC Sparse Modular Multilevel Converter

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