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A Vertical Flux-Switching Permanent Magnet Based Oscillating Wave Power Generator with Energy Storage

Author

Listed:
  • Yu Zou

    (Power Electronics Research Center, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong)

  • Ka Wai Eric Cheng

    (Power Electronics Research Center, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong)

Abstract

In this paper, an effective low-speed oscillating wave power generator and its energy storage system have been proposed. A vertical flux-switching permanent magnet (PM) machine is designed as the generator while supercapacitors and batteries are used to store the energy. First, the overall power generation system is established and principles of the machine are introduced. Second, three modes are proposed for the energy storage system and sliding mode control (SMC) is employed to regulate the voltage of the direct current (DC) bus, observe the mechanical input, and feedback the status of the storage system. Finally, experiments with load and sinusoidal mechanical inputs are carried out to validate the effectiveness and stability of power generation for wave energy. The results show that the proposed power generation system can be employed in low-speed environment around 1 m/s to absorb random wave power, achieving over 60% power efficiency. The power generation approach can be used to capture wave energy in the future.

Suggested Citation

  • Yu Zou & Ka Wai Eric Cheng, 2017. "A Vertical Flux-Switching Permanent Magnet Based Oscillating Wave Power Generator with Energy Storage," Energies, MDPI, vol. 10(7), pages 1-19, June.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:7:p:887-:d:103246
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    References listed on IDEAS

    as
    1. Henderson, Ross, 2006. "Design, simulation, and testing of a novel hydraulic power take-off system for the Pelamis wave energy converter," Renewable Energy, Elsevier, vol. 31(2), pages 271-283.
    2. Ningjun Feng & Haitao Yu & Minqiang Hu & Chunyuan Liu & Lei Huang & Zhenchuan Shi, 2016. "A Study on a Linear Magnetic-Geared Interior Permanent Magnet Generator for Direct-Drive Wave Energy Conversion," Energies, MDPI, vol. 9(7), pages 1-12, June.
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    Citations

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    Cited by:

    1. Gimara Rajapakse & Shantha Jayasinghe & Alan Fleming & Michael Negnevitsky, 2017. "A Model Predictive Control-Based Power Converter System for Oscillating Water Column Wave Energy Converters," Energies, MDPI, vol. 10(10), pages 1-17, October.
    2. Gimara Rajapakse & Shantha Jayasinghe & Alan Fleming & Michael Negnevitsky, 2018. "Grid Integration and Power Smoothing of an Oscillating Water Column Wave Energy Converter," Energies, MDPI, vol. 11(7), pages 1-19, July.
    3. Siyang Li & Kwok Ho Lam & Ka Wai Eric Cheng, 2017. "The Thermoelectric Analysis of Different Heat Flux Conduction Materials for Power Generation Board," Energies, MDPI, vol. 10(11), pages 1-14, November.

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