Abstract
The reliable state of charge (SOC) estimation is indispensable for flow batteries to maintain the safe and reliable operation. The widely adopted Extended Kalman filter (EKF) algorithm is a model-based method, however, the uncertainties in battery model will cause large errors in SOC estimation. An accurate battery model is the essence to capture the behaviors of batteries. In this paper, a novel framework for the SOC estimation of Zinc-nickel flow batteries is proposed based on the fast recursive algorithm (FRA) and extended Kalman filter (EKF). The FRA is firstly used to determine the model structure and identify the model parameters. Due to merits of FRA, a compact and accurate model of flow battery is built. Then, the SOC is estimated using the EKF based on the proposed linear-in-the-parameter model. Experimental studies and resultant simulations manifest the modelling accuracy of the proposed SOC estimation framework.
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Acknowledgments
YH. LI would like to thank the China Scholarship Council (CSC) for sponsoring her research. S. LI, YX. LI and K. LI would like to thank the Macao Science and Technology Development Fund (FDCT) s support with the project (111/2013/A3)-Flow Battery Storage System Study and Its Application in Power System and Dr. CK Wong to provide the data and experimental resource.
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Li, Y., Li, K., Li, S., Li, Y. (2018). FRA and EKF Based State of Charge Estimation of Zinc-Nickel Single Flow Batteries. In: Li, K., Zhang, J., Chen, M., Yang, Z., Niu, Q. (eds) Advances in Green Energy Systems and Smart Grid. ICSEE IMIOT 2018 2018. Communications in Computer and Information Science, vol 925. Springer, Singapore. https://doi.org/10.1007/978-981-13-2381-2_17
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DOI: https://doi.org/10.1007/978-981-13-2381-2_17
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