Dynamic performance of a point absorber WEC considering nonlinear hardening spring under irregular waves
Wave energy is a kind of clean renewable energy that is huge and still need further research. Point absorber wave energy converter (PA-WEC) is widely utilized for offshore power devices. The PA-WEC utilizes the heave motion to drive linear electric generator or a hydraulic motor to generator using p...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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European Wave and Tidal Energy Conference
2023-03-01
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| Series: | International Marine Energy Journal |
| Subjects: | |
| Online Access: | https://marineenergyjournal.org/imej/article/view/131 |
| _version_ | 1797850985098379264 |
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| author | Zongyu Chang Zhenhua Hou Zhongqiang Zheng |
| author_facet | Zongyu Chang Zhenhua Hou Zhongqiang Zheng |
| author_sort | Zongyu Chang |
| collection | DOAJ |
| description | Wave energy is a kind of clean renewable energy that is huge and still need further research. Point absorber wave energy converter (PA-WEC) is widely utilized for offshore power devices. The PA-WEC utilizes the heave motion to drive linear electric generator or a hydraulic motor to generator using power take off (PTO) system. And the PTO system usually is assumed to be a linear spring and a linear damper. Because of the larger motion, the PTO system, which exhibited non-linear behavior, is considered as linear spring with the nonlinear hardening spring and a linear damper. Through the time domain method, the dynamic model of the PA-WEC is developed under irregular waves. The state space model replaced the convolution term in the frequency domain equation. The dynamic response of the PA-WEC is researched considering different environmental parameters by Runge-Kutta method. Then the power and power ratio performance of the system is obtained. Compare with the linear WEC, the results show that the nonlinear WEC can increase the power captured in irregular waves.
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| first_indexed | 2024-04-09T19:10:25Z |
| format | Article |
| id | doaj.art-a3028fba018a48c5a5fc1ac3c24b60d8 |
| institution | Directory Open Access Journal |
| issn | 2631-5548 |
| language | English |
| last_indexed | 2024-04-09T19:10:25Z |
| publishDate | 2023-03-01 |
| publisher | European Wave and Tidal Energy Conference |
| record_format | Article |
| series | International Marine Energy Journal |
| spelling | doaj.art-a3028fba018a48c5a5fc1ac3c24b60d82023-04-06T19:59:14ZengEuropean Wave and Tidal Energy ConferenceInternational Marine Energy Journal2631-55482023-03-016110.36688/imej.6.19-25Dynamic performance of a point absorber WEC considering nonlinear hardening spring under irregular wavesZongyu ChangZhenhua HouZhongqiang Zheng0Ocean University of ChinaWave energy is a kind of clean renewable energy that is huge and still need further research. Point absorber wave energy converter (PA-WEC) is widely utilized for offshore power devices. The PA-WEC utilizes the heave motion to drive linear electric generator or a hydraulic motor to generator using power take off (PTO) system. And the PTO system usually is assumed to be a linear spring and a linear damper. Because of the larger motion, the PTO system, which exhibited non-linear behavior, is considered as linear spring with the nonlinear hardening spring and a linear damper. Through the time domain method, the dynamic model of the PA-WEC is developed under irregular waves. The state space model replaced the convolution term in the frequency domain equation. The dynamic response of the PA-WEC is researched considering different environmental parameters by Runge-Kutta method. Then the power and power ratio performance of the system is obtained. Compare with the linear WEC, the results show that the nonlinear WEC can increase the power captured in irregular waves. https://marineenergyjournal.org/imej/article/view/131wave energy converter, nonlinear hardening spring, PTO, irregular waves, state space model, dynamic performance |
| spellingShingle | Zongyu Chang Zhenhua Hou Zhongqiang Zheng Dynamic performance of a point absorber WEC considering nonlinear hardening spring under irregular waves International Marine Energy Journal wave energy converter, nonlinear hardening spring, PTO, irregular waves, state space model, dynamic performance |
| title | Dynamic performance of a point absorber WEC considering nonlinear hardening spring under irregular waves |
| title_full | Dynamic performance of a point absorber WEC considering nonlinear hardening spring under irregular waves |
| title_fullStr | Dynamic performance of a point absorber WEC considering nonlinear hardening spring under irregular waves |
| title_full_unstemmed | Dynamic performance of a point absorber WEC considering nonlinear hardening spring under irregular waves |
| title_short | Dynamic performance of a point absorber WEC considering nonlinear hardening spring under irregular waves |
| title_sort | dynamic performance of a point absorber wec considering nonlinear hardening spring under irregular waves |
| topic | wave energy converter, nonlinear hardening spring, PTO, irregular waves, state space model, dynamic performance |
| url | https://marineenergyjournal.org/imej/article/view/131 |
| work_keys_str_mv | AT zongyuchang dynamicperformanceofapointabsorberwecconsideringnonlinearhardeningspringunderirregularwaves AT zhenhuahou dynamicperformanceofapointabsorberwecconsideringnonlinearhardeningspringunderirregularwaves AT zhongqiangzheng dynamicperformanceofapointabsorberwecconsideringnonlinearhardeningspringunderirregularwaves |