Design and Planning of Repurposed/Reused Electric Vehicles Batteries in Isolated Microgrids

https://doi.org/10.1016/j.segan.2024.101303Get rights and content
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Highlights

  • The planning framework is based on a backward-forward propagation approach, and measures the microgrid adequacy in terms of Repurposed Electric Vehicle Battery (REVB) energy to power ratio.

  • A power sharing strategy is implemented to minimize investment costs while ensuring the microgrid’s adequacy requirements.

  • The effectiveness of the proposed approach is tested on the CIGRE isolated microgrid test system considering deterministic and stochastic case studies.

  • In order to determine the LOLP of the microgrid, the COPT has to be constructed, which will include the capacities and associated FORs. The COPT can be derived from the conditional probability relationship.

Abstract

Repurposed Electric Vehicle Batteries (REVBs) are gaining increasing attention as an alternate option to new Battery Energy Storage Systems (BESS) in microgrids. In this context, incorporating microgrid’s adequacy requirements as well as power sharing of multiple REVB-based units within the planning framework is essential. In this paper, a comprehensive multi-year, multi-unit REVB-based microgrid planning approach is proposed to determine the optimal power and energy sizes, time of commissioning, and year of replacement of REVB units, considering their capacity and calendar degradation effects. A power sharing strategy is proposed to enhance the battery useful life and delay the replacement of REVB units to minimize the total investment cost, while ensuring that microgrid’s adequacy requirements are met. The proposed planning framework is based on a heuristic backward-forward propagation approach, featuring the novel concept of measuring the adequacy level of the microgrid in terms of REVB energy to power ratio. The proposed approach is tested on the CIGRE isolated microgrid test system to verify its ability to properly plan and operate an REVB-Based isolated microgrid. Extensive studies considering deterministic, and stochastic cases are presented to demonstrate the effectiveness of the proposed approach. To keep the microgrid adequacy measure of the energy to power ratio to an acceptable level, the results shows an increase of 8% in the energy capacity size of the microgrid in the terminal years while having a proper power sharing strategy.

Keywords

Battery energy storage system
Battery degradation
Microgrid
Repurposed electric vehicle battery

Data availability

Data will be made available on request.

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