Modular Multilevel Series Parallel Converter Prototype Design for Li-ion Battery Management Systems

Konidaris, Nick; Karunathilake, Dulmini; Vilathgamuwa, D.M.; Mishra, Yateendra

doi:10.1109/isgtasia49270.2021.9715607

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…The additional parallel operating states lead to capacitor voltage ripple reduction and capacitance saving, which enables the MMSPC to be applied in STATCOMS and low-frequency scenarios such as motor drive [51], [57], [90]. Moreover, current literature also reports the application of different converters based on SM parallel connectivity in BESSs [91]- [93].…”

Section: Application Fieldsmentioning

confidence: 99%

Beyond the MMC: Extended Modular Multilevel Converter Topologies and Applications

Sun

Tian

Pou

et al. 2022

IEEE Open J. Power Electron.

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The unique advantages of modular multilevel converters (MMCs) have led to wide adoption of the converter topology in high voltage dc (HVDC) transmission systems, with great potential for use in medium voltage motor drive and dc grid applications. Inspired by the structure of the MMC, many extended converter topologies have been developed in the literature. These include, in addition to conventional parallel multiphase connection, a variety of series-connected topologies. Extended MMCs integrate the modular nature of cascaded SMs of the MMC but with different topology structure leading to substantially different operating principles. Given the growing number of such topologies, this paper provides a critical review of MMC derived topologies and summarizes individual advantages and disadvantages. The control schemes * : Common characteristics and advantages/disadvantages of the whole category.

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Section: Application Fieldsmentioning

confidence: 99%

Beyond the MMC: Extended Modular Multilevel Converter Topologies and Applications

Sun

Tian

Pou

et al. 2022

IEEE Open J. Power Electron.

View full text Add to dashboard Cite

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Degradation-Conscious Multiobjective Optimal Control of Reconfigurable Li-Ion Battery Energy Storage Systems

et al. 2023

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Lithium-ion battery energy storage systems are made from sets of battery packs that are connected in series and parallel combinations depending on the application’s needs for power. To achieve optimal control, advanced battery management systems (ABMSs) with health-conscious optimal control are required for highly dynamic applications where safe operation, extended battery life, and maximum performance are critical requirements. The majority of earlier research assumed that the battery cells in these energy storage systems were identical and would vary uniformly over time in terms of cell characteristics. However, in real-world situations, the battery cells might behave differently for a number of reasons. Overcharging and over-discharging are caused by an electrical imbalance that results from the cells’ differences in properties and capacity. Therefore in this study, a stratified real-time control scheme was developed for the dual purposes of minimizing the capacity fade and the energy losses of a battery pack. Each of the cells in the pack is represented by a degradation-conscious physics-based reduced-order equivalent circuit model. In view of the inconsistencies between cells, the proposed control scheme uses a state estimator such that the parametric values of the circuit elements in the cell model are determined and updated in a decentralized manner. The minimization of the capacity fade and energy losses is then formulated as a multiobjective optimization problem, from which the resulting optimal control strategy is realized through the switching actions of a modular multilevel series-parallel converter which interconnects the battery pack to an external AC system. A centralized controller ensures optimal switching sequence of the converter leading to the maximum utilization of the capacity of the battery pack. Both simulation and experimental results are used to verify the proposed methodologies which aim at minimizing the battery degradation by reconfiguring the battery cells dynamically in accordance with the state of health (SOH) of the pack.

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Modular Multilevel Series Parallel Converter Prototype Design for Li-ion Battery Management Systems

Cited by 2 publications

References 9 publications

Beyond the MMC: Extended Modular Multilevel Converter Topologies and Applications

Beyond the MMC: Extended Modular Multilevel Converter Topologies and Applications

Degradation-Conscious Multiobjective Optimal Control of Reconfigurable Li-Ion Battery Energy Storage Systems

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