Assessing the accuracy of loss estimation methods for supercapacitor energy storage devices operating under constant power cycling

Kulsangcharoen, Ponggorn and Klumpner, Christian and Rashed, Mohamed and Asher, Greg and Chen, George Z. and Norman, Stuart A. (2014) Assessing the accuracy of loss estimation methods for supercapacitor energy storage devices operating under constant power cycling. In: 2014 16th European Conference on Power Electronics and Applications (EPE'14-ECCE Europe), 26-28 August 2014, Lappeenranta, Finland.

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Abstract

This paper assesses different energy loss estimation methods using the supercapacitor model parameters extracted from the electrochemical impedance spectroscopy (EIS). Two energy loss estimation methods are applied to two similar supercapacitors from different manufacturers operating under constant power charge-discharge cycling. The simpler loss method uses only the impedance data that corresponds to the cycle frequency and the instantaneous current data whilst the more complex method uses the detailed impedance vs frequency dependency and the corresponding current harmonics available from the FFT. The experimental loss data (the benchmark) uses integration of instantaneous power processed by the supercapacitor. By comparing the difference between the estimated and the experimental losses, the performance of each method is assessed and the factors that influence the accuracy of the two loss estimation methods as well as their limitations are highlighted.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Doi:10.1109/EPE.2014.6911043
Keywords: Efficiency, Energy storage, Estimation technique, Power cycling, Supercapacitors
Schools/Departments: University of Nottingham UK Campus > Faculty of Engineering > Department of Electrical and Electronic Engineering
Identification Number: https://doi.org/10.1109/EPE.2014.6911043
Depositing User: Klumpner, Dr Christian
Date Deposited: 12 Jul 2016 09:37
Last Modified: 13 Sep 2016 14:13
URI: http://eprints.nottingham.ac.uk/id/eprint/34811

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