State-of-Charge Balancing Control in Grid-Connected Single-Phase Cascaded H-Bridge Multilevel Converter Based Battery Storage Systems

Eroğlu, Fatih; Kurtoğlu, Mehmet; Eren, Ahmet; Vural, Ahmet Mete

doi:10.1109/gpecom55404.2022.9815791

Cited by 3 publications

(2 citation statements)

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“…For the CFBMC, the output voltage is the one to equalize [22][23][24][25]. This last converter has been widely explored in recent times for energy storage systems, where the State-Of-Charge (SOC) of batteries is the variable to equalize [26,27]. In this case, since the output current is the same for all the cells, the modulation index for the output voltage of one cell can be increased/decreased if more/less power is to be transferred from or to the battery supplying this module.…”

Section: Introductionmentioning

confidence: 99%

“…The present article applies to the CFBMC, proposing a decentralized controller based on [3,21] that differs from most of the works found in the literature, where the balancing is achieved by means of a controller that finds the error comparing the control variable of one cell with the average of all the other cell variables. This task needs to be assumed by a supervisor in a centralized way, either for the SOC [26,27], the DC link voltage [28] or the output power [29]. With this control approach, the average computation of the state variables is strongly dependent on the reliability of all the connections with respect to obtaining the measurements, meaning that if one measurement is lost or mistaken, all the control signals will be erratic.…”

Section: Introductionmentioning

confidence: 99%

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Decentralized Control for the Cell Power Balancing of a Cascaded Full-Bridge Multilevel Converter

Vivert¹,

Díez²,

Cousineau³

et al. 2023

Preprint

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In modern inverter applications, multilevel converters are used thanks to their capability of reducing the passive fi lter volumes, improving the overall THD, sharing the power sources across the several converter cells, and providing a reconfi guration ability in case of failure. However, increasing the number of cells makes more complex the control of the converter. This article proposes a decentralized control technique based on the use of elementary modular controllers, associated with each converter cell and communicating with their close neighbors to obtain the balancing of the powers they supplied. Each modular controller can be dynamically removed or added to allow reconfi guration of the converter for functional safety purpose. This method is applied to a 240V/3A 5-cells Cascaded Full-Bridge Multilevel Converter. The response of the system to load transients and cell voltage disturbances demonstrates the robustness of the proposed decentralized control method. Thanks to the use of modular controllers, the number of levels of the converter can be extended to the order N without adding complexity to its control.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Decentralized Control for the Cell Power Balancing of a Cascaded Full-Bridge Multilevel Converter

Vivert¹,

Díez²,

Cousineau³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

A novel adaptive state-of-charge balancing control scheme for cascaded H-bridge multilevel converter based battery storage systems

et al. 2023

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Decentralized Control for the Cell Power Balancing of a Cascaded Full-Bridge Multilevel Converter

et al. 2023

View full text Add to dashboard Cite

This article presents a decentralized control technique applied to a Cascaded Full-Bridge Multilevel Converter (CFBMC) to balance the amount of power provided by its independent cells connected in series. It is based on the use of elementary modular controllers, associated with each converter cell, communicating with their close neighbors to obtain the appropriate power balancing. A complete theoretical study of the system is provided in terms of modal responses, feedback loop bandwidth and stability criteria and the design method of the correctors is explained as well. Each modular controller can be dynamically removed or added to allow reconfiguration of the number of converter cells during operation for functional safety purposes. This method is illustrated with a five-cell CFBMC, studied both with simulations and experimental tests. The response of the system to load transients and cell voltage disturbances demonstrates the robustness of the proposed control method. Thanks to its modularity, the number of voltage levels of the converter can be easily increased by inserting new cells in series without adding complexity to the control part.

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State-of-Charge Balancing Control in Grid-Connected Single-Phase Cascaded H-Bridge Multilevel Converter Based Battery Storage Systems

Cited by 3 publications

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Decentralized Control for the Cell Power Balancing of a Cascaded Full-Bridge Multilevel Converter

Decentralized Control for the Cell Power Balancing of a Cascaded Full-Bridge Multilevel Converter

A novel adaptive state-of-charge balancing control scheme for cascaded H-bridge multilevel converter based battery storage systems

Decentralized Control for the Cell Power Balancing of a Cascaded Full-Bridge Multilevel Converter

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