Advanced power control system for enhancing second-life battery energy storage systems integration and reliability

Poblete Durruty, Pablo Martin

Advanced power control system for enhancing second-life battery energy storage systems integration and reliability

Poblete Durruty, Pablo Martin

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Publication Type:: Thesis
Issue Date:: 2024

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Field	Value	Language
dc.contributor.author	Poblete Durruty, Pablo Martin
dc.date.accessioned	2025-01-30T03:05:01Z
dc.date.available	2025-01-30T03:05:01Z
dc.date.issued	2024
dc.identifier.uri	http://hdl.handle.net/10453/184611
dc.description	University of Technology Sydney. Faculty of Engineering and Information Technology.	en_US.UTF-8
dc.description.abstract	Electric power grids are rapidly transforming due to the increasing integration of variable renewable energy sources (RES), distributed generation, and new loads associated with electric vehicle (EV) charging stations. These changes bring several technical challenges related to grid stability and integrity, increasing the operational complexity of future grids. One of the most promising solutions to mitigate some of the issues related to RES is using battery energy storage systems (BESS). BESS can absorb active power when there is a surplus of RES power generation and output this power when it is most convenient. Moreover, BESS can also operate as an energy backup and provide ancillary services to the grid, increasing the power system flexibility. However, the high investment costs of Lithium-ion batteries impose a relevant cost barrier to the widespread adoption of this technology. Intending to provide a new energy storage alternative that can accelerate the transition towards RES, this thesis presents a novel Cascaded H-Bridge (CHB) converter control and modulation strategy for the effective integration of second-life BESS (SL-BESS) into the electrical grid. These systems use batteries that have reached the end of their first operational life but still retain sufficient capacity for another use in a less demanding application. In particular, this work gives special attention to optimal modulation techniques, and optimal current and state of charge control strategies for the CHB converter with battery packs directly connected to each H-Bridge sub-module. Simulation and experimental results are provided to verify the effectiveness of the proposed modulation and control strategies for a three-phase CHB converter-based SL-BESS prototype formed by second-life Lithium-ion battery packs.	en_US.UTF-8
dc.format	Thesis (PhD)
dc.language.iso	en_US	en_US.UTF-8
dc.relation	https://opus.lib.uts.edu.au/bitstream/10453/184611/1/thesis.pdf
dc.rights	info:eu-repo/semantics/openAccess
dc.rights	The author owns the copyright in this thesis including all reproduction and reuse rights for the work. The work may not be altered without the permission of the copyright owner. Attribution is essential when quoting or paraphrasing from this thesis.
dc.rights	© 2024 Pablo Martin Poblete Durruty
dc.rights	au.edu.uts.lib/cph
dc.title	Advanced power control system for enhancing second-life battery energy storage systems integration and reliability	en_US.UTF-8
dc.type	Thesis
utslib.copyright.status	open_access	*

Abstract:

Electric power grids are rapidly transforming due to the increasing integration of variable renewable energy sources (RES), distributed generation, and new loads associated with electric vehicle (EV) charging stations. These changes bring several technical challenges related to grid stability and integrity, increasing the operational complexity of future grids. One of the most promising solutions to mitigate some of the issues related to RES is using battery energy storage systems (BESS). BESS can absorb active power when there is a surplus of RES power generation and output this power when it is most convenient. Moreover, BESS can also operate as an energy backup and provide ancillary services to the grid, increasing the power system flexibility. However, the high investment costs of Lithium-ion batteries impose a relevant cost barrier to the widespread adoption of this technology. Intending to provide a new energy storage alternative that can accelerate the transition towards RES, this thesis presents a novel Cascaded H-Bridge (CHB) converter control and modulation strategy for the effective integration of second-life BESS (SL-BESS) into the electrical grid. These systems use batteries that have reached the end of their first operational life but still retain sufficient capacity for another use in a less demanding application. In particular, this work gives special attention to optimal modulation techniques, and optimal current and state of charge control strategies for the CHB converter with battery packs directly connected to each H-Bridge sub-module. Simulation and experimental results are provided to verify the effectiveness of the proposed modulation and control strategies for a three-phase CHB converter-based SL-BESS prototype formed by second-life Lithium-ion battery packs.

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http://hdl.handle.net/10453/184611