Operation Limits of the Hybrid DC/DC Modular Multilevel Converter for HVdc Grids Connections

Razani, Ramin

doi:10.1109/jestpe.2020.3017206

Cited by 8 publications

(1 citation statement)

References 27 publications

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“…Îp and Îs can be minimized by maximizing ac arm voltages Vp and Vs [26], [27]. Note that if the generated arm ac voltage is greater than arm dc voltage, solely FBSMs are employed in that arm to ensure SM capacitor balance can be satisfied [28].…”

Section: A Current Stresses and Semiconductor Effortmentioning

confidence: 99%

Comparative Assessment of Multi-Port MMCs for High-Power Applications

Kish

2022

IEEE Access

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Multi-port converters can interconnect different dc and ac systems while reducing semiconductor requirements and losses by eliminating redundant power conversion stages. Modular multilevel converter (MMC)-based multiport systems are well suited for application in mixed ac-dc grids containing high-voltage dc (HVDC) and medium-voltage dc (MVDC) systems. This paper conducts a detailed comparative assessment of multi-port dc-dc-ac MMCs for high power applications. Four representative topologies are chosen for study due to their contrasting internal power processing characteristics. Three different network scenarios are investigated that include HVDC and MVDC applications, covering several different power flow cases. The multi-port MMCs are compared in terms of losses, semiconductor effort, internal energy storage and magnetics requirements. The results are extensively discussed and general conclusions are summarized. INDEX TERMS Ac and dc grids, dc-dc modular multilevel converter, multi-port converter.NOMENCLATURE

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Section: A Current Stresses and Semiconductor Effortmentioning

confidence: 99%