Journal of Drive and Control (드라이브 ㆍ 컨트롤)

The Korean Society for Fluid Power and Construction Equipment (유공압건설기계학회)
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Application of Secondary Control Hydrostatic Transmission in A Multi-Point Absorbing Wave Energy Converter

다수의 가동물체형 파력발전기에 있어서의 2차측 제어 정유압변속기 응용

  • Do, H.T. (School of Mechanical Engineering, University of Ulsan) ;
  • Ahn, K.K. (School of Materials Science and Engineering, University of Ulsan)
  • Received : 2014.01.07
  • Accepted : 2014.02.25
  • Published : 2014.03.01
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Abstract

This paper presents a novel concept of wave energy converter for electric generation from the ocean wave energy. In this paper, a Multi-Point Absorbing Wave Energy Converter, shortened as MPAWEC by using Secondary Control Hydrostatic Transmission (SCHST) was proposed. The power take-off (PTO) system in the proposed MPAWEC includes multi heaving buoys to drive hydraulic pumps placed at different points. The application of SCHST in MPAWEC gives some advantages, such as longevity of hydraulic components; more energy is harvested; the variation of the pressure in the accumulator limited; therefore the accumulator volume is reduced and the output speed is more stable, etc. A PID controller was designed for speed control of the hydraulic motor. The simulation results indicated that the speed of the generator was ensured with the relative error as 0.67%; the efficiency of the proposed system was 71.4%.

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References

  1. G. Nielsen, M. Andersen, K. Argyriadis, S. Butterfield, N. Fonseca, T. Kuroiwa, M. L. Boulluec, S.J. Liao, S.R. Turnock, J. Waegter, 2006. Specialist Committee V.4: Ocean Wind and Wave Energy Utilization, 16th Int. Ship and Offshore Structures Congress (2006), UK, 165-211.
  2. S. Chandrasekaran, Harender, 2011. Design and Efficiency Analysis of a Mechanical Wave Energy Converter, Proc. of ASME 30th Int. Conf. on Ocean, Offshore and Arctic Engineering, 673-678.
  3. H. H. Tien, D. Q. Truong, K. K. Ahn, 2011. A study on wave energy harvesting using hydrostatic transmission, 11th Int. Conf. on Control, Automation and Systems, Korea, 1600-1605.
  4. M. Vantorre, R. Banasiak, R. Verhoeven, 2004. Modelling of hydraulic performance and wave energy extraction by a point absorber in heave, Applied Ocean Research 26, 61-72. https://doi.org/10.1016/j.apor.2004.08.002
  5. J.M. Alsina, T.E. Baldock, 2007. Improved representation of breaking wave energy dissipation in parametric wave transformation models, Coastal Engineering 54, 765-769. https://doi.org/10.1016/j.coastaleng.2007.05.005
  6. L. Margheritini, L. Victor, J. P. Kofoed, P. Troch, 2009. Geometrical Optimization for Improved Power Capture of Multi-level Overtopping Based Wave Energy Converters, Proc.of the 19th Int. Offshore and Polar Eng. Conf., Japan, 339-344.
  7. A. G. Santana, D. E. M. Andrade, A. V. Jaen, 2010. Control of Hydrodynamic Parameters of Wave Energy Point Absorbers using Linear Generators and VSC-based Power Converters Connected to the Grid, Int.l Conf. on Renewable Energies and Power Quality, Spain.
  8. A. F. de O. Falco, 2007. Phase control through load control of oscillating body wave energy converters with hydraulic PTO system, Ocean Engineering, vol. 35, 358-366.
  9. A. Babarit, M. Guglielmi, and A. H. Clement, 2009. Declutching control of a wave energy converter, Ocean Engineering, vol. 36, 1015-1024. https://doi.org/10.1016/j.oceaneng.2009.05.006
  10. Y.M. Jen, C.B. Lee, 1993. Influence of an accumulator on the performance of a hydrostatic drive with control of the secondary unit, IMechME, vol. 207, 173-184.
  11. T. H. Ho, K.K. Ahn, 2010. Modeling and simulation of a hydrostatic transmission system with energy recuperation using a hydraulic accumulator, JMST, vol.24-5, 1163-1175.
  12. H. T. Do and K. K. Ahn, 2012. A Study of Energy Saving Hydraulic System by A Pressure Coupling Hydrostatic Transmission, Journal of The Korean Society for Fluid Power & Construction Equipments, vol. 9-1, 10-17. https://doi.org/10.7839/ksfc.2012.9.1.010
  13. H. T. Do and K. K. Ahn, 2013. A Study of Wind Energy Conversion System by a Secondary Control Hydrostatic Transmission, Journal of The Korean Society for Fluid Power & Construction Equipments, vol. 10-1, 21-28. https://doi.org/10.7839/ksfc.2013.10.1.021
  14. H. Berg, and M. Ivantysynova, 1999. Design and testing of a robust linear controller for secondary controlled hydraulic drive, IMechE, vol. 213, 375-386. https://doi.org/10.1243/0957650991537752
  15. C. S.Kim, C. O. Lee, 2000. Robust speed control of a variable-displacement hydraulic motor considering saturation nonlinearity, ASME, vol.122, 196-201. https://doi.org/10.1115/1.521457
  16. M. G. Rabie, 2009. Fluid Power Engineering, McGraw-Hill.
  17. M. J.Pinches, J. G. Ashby, 1988. Power Hydraulics, Englewood Cliffs, NJ: Prentice-Hall.
  18. J. Falnes, 2002. Ocean Waves and Oscillating Systems, Linear Interaction Including Wave-Energy Extraction, U.K.: Cambridge Univ., 184-191.