Extension and improvement of synchronous linear generator based point absorber operation in high wave excitation scenarios

Autor:	Aitor Saenz-Aguirre, Gabriel Ibarra-Berastegui, Jon Sáenz, Alain Ulazia
Rok vydání:	2021
Předmět:	Physics Wavefront W2W model Environmental Engineering field weakening Ocean Engineering fluid dynamics linear generator Magnetic flux Power (physics) Control system Magnet Linear congruential generator point absorber Energy (signal processing) Excitation Marine engineering wave energy high waves
Zdroj:	Addi. Archivo Digital para la Docencia y la Investigación instname
Popis:	[EN]The exploitation of marine wave energy resource has led to the design of numerous Wave Energy Converter (WEC) configurations. The power absorption of a WEC is tightly related to its physical properties and the characteristics of the incoming wave front. Additionally, the operational range of a WEC is limited to certain characteristics of the incoming waves. These restrictions are usually related to limitations in the maximum force of the Power Take-off (PTO) system and the safety of the WEC. As a result, the power production of the WEC must be stopped during sea states of high wave elevation. With the objective of improving the operation of a WEC during these sea states, a Field Weakening (FW) control functionality is proposed to be implemented in the control system of a single-body linear in heave oscillating point absorber with a Permanent Magnet Synchronous Linear Generator (PMSLG) based electrical PTO system. The aim of the aforementioned functionality is to attenuate the magnetic flux in the PMSLG during sea states of high wave elevation. The influence of the size of a WEC on the benefits of the proposed FW functionality is also studied. To that end, two point absorbers with different size are analysed with NEMOH and a wave-to-wire (W2W) model of each WEC is developed. This W2W model enables analysis of the performance and power production of the WECs at different sea states of interest. The obtained results show a remarkable improvement of the operation of a WEC with the implementation of the FW strategy during sea states of high excitation, which leads to an extension of its operation and subsequent additional energy/hydrogen generation. Authors acknowledge financial support by the Spanish Ministry of Science and Innovation, Agencia Espanola de Investigacion (grant PID2020-116153RB-I00/AEI/10.13039/501100011033) and the University of the Basque Country under the contract (UPV/EHU, GIU20/008) .
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e54968de2a676d2d3970312a72128426 http://hdl.handle.net/10810/54235 Zobrazit plný text záznamu