Supercapacitor testing for power smoothing in a variable speed offshore wave energy converter

Dónal B. Murray; J. G. Hayes; M. G. Egan; D. L. O'Sullivan

doi:10.1109/APEC.2011.5744860

Supercapacitor testing for power smoothing in a variable speed offshore wave energy converter

Dónal B. Murray
, J. G. Hayes
, M. G. Egan
, D. L. O'Sullivan

School of Biological, Earth and Environmental Sciences

University College Cork

Research output: Chapter in Book/Report/Conference proceedings › Conference proceeding › peer-review

Abstract

This paper investigates power smoothing in a full-scale offshore Oscillating Water Column (OWC) Wave Energy Converter (WEC) by integrating supercapacitors (SCs) with the inertia of a Wells turbine controlled at variable speed. A Simulink model is developed for the WEC system utilising sea state data and a SC system is sized to smooth and reduce the grid peak power for a 570 kW (peak) system. Long component lifetime is a requirement for offshore WECs, so a computer-controlled test rig has been built to validate SC lifetimes to manufacturer's specifications and determine application lifetime. Cycle testing is carried out on individual SCs utilising GPIB controlled test equipment programmed by Matlab. The application testing is carried out using time-compressed scaled-power profiles from the model to allow a comparison of lifetime degradation. The SCs under standard testing and application testing have to date undergone over 750,000 cycles and 85,000 cycles respectively corresponding to almost six months of continuous operation.

Original language	English
Title of host publication	2011 26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011
Pages	1933-1939
Number of pages	7
DOIs	https://doi.org/10.1109/APEC.2011.5744860
Publication status	Published - 2011
Event	26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011 - Fort Worth, TX, United States Duration: 6 Mar 2011 → 10 Mar 2011

Publication series

Name	Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC

Conference

Conference	26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011
Country/Territory	United States
City	Fort Worth, TX
Period	6/03/11 → 10/03/11

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Access to Document

10.1109/APEC.2011.5744860

Cite this

Murray, D. B., Hayes, J. G., Egan, M. G., & O'Sullivan, D. L. (2011). Supercapacitor testing for power smoothing in a variable speed offshore wave energy converter. In 2011 26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011 (pp. 1933-1939). Article 5744860 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). https://doi.org/10.1109/APEC.2011.5744860

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title = "Supercapacitor testing for power smoothing in a variable speed offshore wave energy converter",

abstract = "This paper investigates power smoothing in a full-scale offshore Oscillating Water Column (OWC) Wave Energy Converter (WEC) by integrating supercapacitors (SCs) with the inertia of a Wells turbine controlled at variable speed. A Simulink model is developed for the WEC system utilising sea state data and a SC system is sized to smooth and reduce the grid peak power for a 570 kW (peak) system. Long component lifetime is a requirement for offshore WECs, so a computer-controlled test rig has been built to validate SC lifetimes to manufacturer's specifications and determine application lifetime. Cycle testing is carried out on individual SCs utilising GPIB controlled test equipment programmed by Matlab. The application testing is carried out using time-compressed scaled-power profiles from the model to allow a comparison of lifetime degradation. The SCs under standard testing and application testing have to date undergone over 750,000 cycles and 85,000 cycles respectively corresponding to almost six months of continuous operation.",

author = "Murray, \{D{\'o}nal B.\} and Hayes, \{J. G.\} and Egan, \{M. G.\} and O'Sullivan, \{D. L.\}",

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language = "English",

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pages = "1933--1939",

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note = "26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011 ; Conference date: 06-03-2011 Through 10-03-2011",

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Murray, DB, Hayes, JG, Egan, MG & O'Sullivan, DL 2011, Supercapacitor testing for power smoothing in a variable speed offshore wave energy converter. in 2011 26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011., 5744860, Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, pp. 1933-1939, 26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011, Fort Worth, TX, United States, 6/03/11. https://doi.org/10.1109/APEC.2011.5744860

Supercapacitor testing for power smoothing in a variable speed offshore wave energy converter. / Murray, Dónal B.; Hayes, J. G.; Egan, M. G. et al.
2011 26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011. 2011. p. 1933-1939 5744860 (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC).

Research output: Chapter in Book/Report/Conference proceedings › Conference proceeding › peer-review

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AB - This paper investigates power smoothing in a full-scale offshore Oscillating Water Column (OWC) Wave Energy Converter (WEC) by integrating supercapacitors (SCs) with the inertia of a Wells turbine controlled at variable speed. A Simulink model is developed for the WEC system utilising sea state data and a SC system is sized to smooth and reduce the grid peak power for a 570 kW (peak) system. Long component lifetime is a requirement for offshore WECs, so a computer-controlled test rig has been built to validate SC lifetimes to manufacturer's specifications and determine application lifetime. Cycle testing is carried out on individual SCs utilising GPIB controlled test equipment programmed by Matlab. The application testing is carried out using time-compressed scaled-power profiles from the model to allow a comparison of lifetime degradation. The SCs under standard testing and application testing have to date undergone over 750,000 cycles and 85,000 cycles respectively corresponding to almost six months of continuous operation.

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Murray DB, Hayes JG, Egan MG, O'Sullivan DL. Supercapacitor testing for power smoothing in a variable speed offshore wave energy converter. In 2011 26th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2011. 2011. p. 1933-1939. 5744860. (Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC). doi: 10.1109/APEC.2011.5744860

Supercapacitor testing for power smoothing in a variable speed offshore wave energy converter

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