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

Yu Zou and Ka Wai Eric Cheng
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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

Energies, 2017, vol. 10, issue 7, 1-19

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.

Keywords: wave power; energy storage; super capacitor; vertical flux-switching machine; SMC (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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