Wave Power Output Smoothing through the Use of a High-Speed Kinetic Buffer

Brenda Rojas-Delgado, Monica Alonso, Hortensia Amaris and Juan de Santiago
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Brenda Rojas-Delgado: Electrical Engineering Department, Universidad Carlos III de Madrid, 28911 Madrid, Spain
Monica Alonso: Electrical Engineering Department, Universidad Carlos III de Madrid, 28911 Madrid, Spain
Hortensia Amaris: Electrical Engineering Department, Universidad Carlos III de Madrid, 28911 Madrid, Spain
Juan de Santiago: Division of Electricity, Department of Engineering Sciences, The Angstrom Laboratory, P.O. Box 534, SE-75121 Uppsala, Sweden

Energies, 2019, vol. 12, issue 11, 1-28

Abstract: In this paper, a new control strategy for power output smoothing in a hybrid wave energy installation coupled to a flywheel energy storage system (FESS) is proposed. The control scheme is composed by three stages: a wave generator clustering process at the farm connection point; a power filtering process; and the control of the flywheel energy storage in order to improve the power output of the hybrid wave farm. The proposed control is validated at the existing Lysekil Wave Energy Site located in Sweden, by using real generator measurements. Results show that the application of the flywheel energy storage system reduces the maximum peak power output from the wave energy installation by 85% and the peak/average power ratio by 76%. It is shown that the proposed system can reduce grid losses by 51%, consequently improving the energy efficiency of the power network. The application of the proposed control strategy allows the hybrid wave power plant to follow a power reference signal that is imposed by the grid operator. In addition, the study demonstrates that the application of the proposed control allows the hybrid wave power plant to follow a power reference signal that is imposed by the grid operator. In addition, the study demonstrates that the application of the proposed control enables a wave farm with flywheel energy storage to be a controllable, flexible resource in order to fulfill future grid code requirements for marine energy installations.

Keywords: wave energy; energy storage; flywheel; power take off (PTO); flywheel energy storage system (FESS) (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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