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Power Management of an Oscillating Water Column Wave Energy Converter with Battery/Supercapacitor Hybrid Energy Storage

Citation

Rajapakse, G and Jayasinghe, S and Fleming, A, Power Management of an Oscillating Water Column Wave Energy Converter with Battery/Supercapacitor Hybrid Energy Storage, Proceedings of 2018 8th International Conference on Power and Energy Systems (ICPES), 21-22 December 2018, Colombo, Sri Lanka, pp. 1-6. ISBN 978-1-5386-6029-4 (2018) [Refereed Conference Paper]

Copyright Statement

Copyright 2018 IEEE

DOI: doi:10.1109/ICPESYS.2018.8626942

Abstract

—This paper focuses on developing a power management system (PMS) for a grid connected oscillating water column (OWC) wave energy converter with a battery/supercapacitor hybrid energy storage system. The main objective of the PMS is to transfer large power pulses present in the input to the energy storage elements and thereby maintain smooth power delivery to the grid. In addition, maintaining state of charge (SOC) of the battery and supercapacitor within safe limits and ensuring sufficient reserves are other objectives of the PMS. In the proposed PMS, power sharing between energy storage elements is determined based on the deviation of the supercapacitor SOC from the mid-point and its rate of change. Moreover, the power commitment to the grid is adjusted based on the deviation of battery SOC from the mid-point and its rate of change. Successful operation of the proposed PMS is verified using MATLAB/Simulink simulations. Apart from that, the variable speed operation of the turbine is also simulated to observe its effect on the supercapacitor sizing. Simulation results show that the variable speed operation help reduce required capacity of the supercapacitor.

Item Details

Item Type:Refereed Conference Paper
Keywords:Hybrid energy storage system, Li-Ion battery energy storage, oscillating water column wave energy converter, power management system, supercapacitor energy storage
Research Division:Engineering
Research Group:Electrical and Electronic Engineering
Research Field:Renewable Power and Energy Systems Engineering (excl. Solar Cells)
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in Engineering
UTAS Author:Rajapakse, G (Mrs Gimara Rajapakse)
UTAS Author:Jayasinghe, S (Dr Shantha Jayasinghe Arachchillage)
UTAS Author:Fleming, A (Dr Alan Fleming)
ID Code:130824
Year Published:2018
Deposited By:Seafaring
Deposited On:2019-02-14
Last Modified:2019-10-23
Downloads:0

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