Research on energy conversion system of floating wave energy converter

Abstract

A wave power device includes an energy harvesting system and a power take-off system. The power take-off system of a floating wave energy device is the key that converts wave energy into other forms. A set of hydraulic power take-off system, which suits for the floating wave energy devices, includes hydraulic system and power generation system. The hydraulic control system uses a special “self-hydraulic control system” to control hydraulic system to release or save energy under the maximum and the minimum pressures. The maximum pressure is enhanced to 23 MPa, the minimum to 9 MPa. Quite a few experiments show that the recent hydraulic system is evidently improved in efficiency and reliability than our previous one, that is expected to be great significant in the research and development of our prototype about wave energy conversion.

This is a preview of subscription content, access via your institution.

References

  1. Falcao, A., 2008. The Development of Wave Energy Utilization, Annual Report 2008 of International Energy Agency Implementing Agreement on Ocean Energy System, 30–37.

    Google Scholar 

  2. Salter, S. H., 1974. Wave power, Nature, 249, 720–724.

    Article  Google Scholar 

  3. Henderson, R., 2006. Design, simulation, and testing of a novel hydraulic power take-off system for the Pelamis wave energy converter, Renewable Energy, 31(1): 271–283.

    Article  Google Scholar 

  4. Minerals Management Service, Renewable Energy and Alternate Use Program, U.S. Department of Interior, 2006. Technology White Paper on Wave Energy Potential on the U.S. Outer Continental Shelf, http://www.camelottech.com/CMFiles/Docs/OCS_EIS_WhitePaper_Wave.pdf.

    Google Scholar 

  5. Davis, S., 2010. Energy from ocean to supply scotland homes with utility power, http://powerelectronics.com/images/OceanWaveEnergy910.pdf.

    Google Scholar 

  6. Ocean Power Technologies, Inc., 2013. Ocean Power Technologies Annual Report, http://phx.corporate-ir.net/phoenix.zhtml?c=155437&p=irol-IRHome.

    Google Scholar 

  7. Yang, Q. B., Li, H., Li, D. S., Jiang, H. R., Li, X. Y. and Liu, S. Q., 2000. Research on 30 kW Pendulum Wave Power Station in Daguan Island, National Ocean Technology Center, Tianjin, China. (in Chinese)

    Google Scholar 

  8. You, Y. G., Zheng, Y. H., Ma, Y. J., Wu, B. J., Yan, X. W., Sheng, S. W., Li, C. L. and Li, H. J., 2006. Report on Key Technology Research of Ocean Wave Energy Stand-alone Power Generation System, Research Report of GuangZhou Institute of Energy Conversation, Chinese Academy of Sciences, Guangzhou, China. (in Chinese)

    Google Scholar 

  9. Zheng, Y. H., You, Y. G., Sheng, S. W., Wu, B. J., Zhang, Y. Q., Wang, K. L., Li, H. J., Li, C. L. and He, Y. Q., 2008. An Stand-alone Stable Power Generation System of Floating Wave Energy, Research Report of GuangZhou Institute of Energy Conversation, Chinese Academy of Sciences, Guangzhou, China. (in Chinese)

    Google Scholar 

  10. Yi, M. L., Zhu, F., Zou, Z. J. and Du, J. M., 1997. An energy-saving hydraulic system with a self-regulated and servo-valve-controlled variable displacement pump, Journal of Huazhong University of Science and Technology, 25(3): 57–59. (in Chinese)

    Google Scholar 

  11. Whittaker, T. J. T., 1997. Learning from the Islay wave power plant, Proceedings of IEE Colloquium on Wave Power: An Engineering and Commercial Perspective (Digest No. 1997/098).

    Google Scholar 

  12. Wang, C. X., 1989. Hydraulic Servo Control System, Beijing, China Machine Press. (in Chinese)

    Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to Ya-ge You 游亚戈.

Additional information

This subject was financially supported by Marine Renewable Energy Funds Projects (Grant Nos. GHME2010GC01 and GHME2011BL06).

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Zhang, Yq., Sheng, Sw., You, Yg. et al. Research on energy conversion system of floating wave energy converter. China Ocean Eng 28, 105–113 (2014). https://doi.org/10.1007/s13344-014-0008-5

Download citation

Key words

  • hydraulic power take-off system (PTO)
  • second transfers
  • conversion efficiency
  • hydraulic control