Derivation of an equivalent submodule per arm for modular multilevel converters

Barnklau, Hans; Gensior, Albrecht; Bernet, Steffen

doi:10.1109/epepemc.2012.6397407

Cited by 30 publications

(10 citation statements)

References 6 publications

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“…In this paper, an MMC with half-bridge cells, which is the most common configuration in HVDC applications, is considered. To simplify the analysis, the series connected cells of each arm are represented by an equivalent cell [6,29] as shown in Figure 1b.…”

Section: Modelingmentioning

confidence: 99%

Pareto Frontier of the Arm Energy Ripple and the Conduction Losses of a Modular Multilevel Converter

López¹,

Fehr²,

Pérez³

et al. 2021

Energies

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Modular multilevel converters can achieve high power quality and voltage ratings, becoming a good alternative for high-voltage direct-current applications. However, the circulating current and capacitor voltage ripple remain significant drawbacks, mainly due to the impact on efficiency and power density. In this work, a stationary operation of a modular multilevel converter is optimized by calculating the Pareto frontier of the arm energy ripple and the conduction losses for different operating conditions. From the set of optimal solutions, the best trade-off between energy ripple and power losses can be chosen depending on the application requirements. Therefore, an optimal operating point regarding capacitor voltage ripple and circulating current was found, optimizing efficiency and allowing a reduction of capacitance, hence size and cost. The theoretical analysis and results are validated experimentally on a prototype test-bench.

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Section: Modelingmentioning

confidence: 99%

Pareto Frontier of the Arm Energy Ripple and the Conduction Losses of a Modular Multilevel Converter

López¹,

Fehr²,

Pérez³

et al. 2021

Energies

Self Cite

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show abstract

“…For correct operation of the diode/switch assembly, the capacitor voltages need to be always positive, i.e. v C (t) ≥ 0, [29]. It follows from (29) and v C (t) ≥ 0 that the objective function defined by (30) is equivalent to that defined by (29).…”

Section: A Objectivementioning

confidence: 99%

“…The objective function (30) avoids any issues associated with the square root operator which would arise in (29).…”

Section: A Objectivementioning

confidence: 99%

Optimization Methods to Reduce Capacitor Stress in Modular Multilevel Converters

et al. 2020

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“…Then the fundamental relationship between the sum of submodule capacitor voltage and arm current can be obtained [6] .…”

Section: Analysis and Caculation Of The Circulating Currentmentioning

confidence: 99%

Circulating current analysis and suppression of modular multilevel converters

Zhang

Wang

2014

2014 17th International Conference on Electrical Machines and Systems (ICEMS)

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Derivation of an equivalent submodule per arm for modular multilevel converters

Cited by 30 publications

References 6 publications

Pareto Frontier of the Arm Energy Ripple and the Conduction Losses of a Modular Multilevel Converter

Pareto Frontier of the Arm Energy Ripple and the Conduction Losses of a Modular Multilevel Converter

Optimization Methods to Reduce Capacitor Stress in Modular Multilevel Converters

Circulating current analysis and suppression of modular multilevel converters

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