SoC-Temperature Based Power Sharing Algorithm for Battery Racks in Grid Ancillary Services

Prashant Pant*, Holger Hesse, Vivek Teja Tanjavooru, Martin Cornejo, Thomas Hamacher, Vedran S. Peric

*Corresponding author for this work

Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearchpeer-review

Abstract

The battery pack lifetime is severely affected by the State-of-Charge (SOC) and operating temperature. This paper proposes a real-time SoC-Temperature balance power-sharing algorithm for the battery racks to optimize the battery life. The control scheme takes into account the SoC disparity and temperature deviation simultaneously to calculate the active power set-points for battery energy storage system (BESS) units. The proposed algorithm can serve as an alternative to the state of the health (SoH) based power sharing algorithms, which require complex SoH estimation procedures and extensive data for battery age prediction. This method can be particularly useful for second-life batteries, which often show significant heterogeneity in age, internal resistance, and capacity, necessitating a generic yet robust control strategy for their optimal utilization and to minimize degradation. Simulation results demonstrate (i) the suitability of the proposed control scheme for real-time implementation, (ii) the controller efficacy to limit high battery temperatures, which can help to slow down the ageing process. Overall, this research enables the easy integration of second-life batteries for grid ancillary services, obviating the need for complex SoH estimation procedures by considering battery temperature and SoC.

Original languageEnglish
Title of host publication2023 4th International Conference on High Voltage Engineering and Power Systems (ICHVEPS)
Number of pages6
PublisherIEEE
Publication date2023
Pages422-427
ISBN (Electronic)979-8-3503-1867-8, 979-8-3503-1868-5
DOIs
Publication statusPublished - 2023
Externally publishedYes
Event4th International Conference on High Voltage Engineering and Power Systems, ICHVEPS 2023 - Denpasar Bali, Indonesia
Duration: 6 Aug 202310 Aug 2023

Conference

Conference4th International Conference on High Voltage Engineering and Power Systems, ICHVEPS 2023
Country/TerritoryIndonesia
CityDenpasar Bali
Period06/08/202310/08/2023
SponsorIEEE Indonesia Section, IEEE ITB Student Branch, IEEE Power and Energy Society Indonesia Chapter (PES), Institut Teknologi Bandung

Keywords

  • grid support
  • second life batteries
  • SOC balance
  • state of health
  • Temperature control

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