FOSWEC v2: System identification and control testing at Hinsdale Wave Research Laboratory

Abstract

This report summarizes the design and execution of a wave tank test of the floating oscillating surge wave energy converter (FOSWEC) in the O.H. Hinsdale Wave Research Laboratory Directional Wave Basin at Oregon State University. This device, which uses two "flaps" that pivot about a central platform when excited by waves, has a natural frequency within the range of the waves by which it is excited. The FOSWEC was originally considered to be a 1:33 scale device, however, for the current tests, no fixed relative scale is used (i.e., the WEC is considered to be scaled for the basin?s wave environment in which it operates). The primary goal of this test was to assess the degree to which previously developed modeling, experimentation, and control design methods could be applied to a broad range of wave energy converter designs. Testing was conducted to identify a dynamic model for the impedance and excitation behavior of the device. Using these models, a series of closed loop tests were conducted using a causal impedance matching controller. This report provides a brief description of the results, as well as a summary of the device and experimental design. The results show that the methods applied to this experimental device perform well and should be broadly applicable.

The data collected during testing is compressed into FOSWEC.zip. Please refer to Appendix C (pages 61-63) of the test report for descriptions of each test ID corresponding to the compressed files.

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Additional Info

DOE Project Name: WEC Co-design
DOE Project Number: FY20 AOP 2.1.2.705
DOE Project Lead: William McShane
DOI: 10.15473/1782587
Last Updated: 20 days ago
Feb
2020
Data from February, 2020
Submitted May 12, 2021

Contact

Sandia National Laboratories


505.845.9064

Status

Publicly accessible License 

Authors

Ryan Coe
Sandia National Laboratories
Giorgio Bacelli
Sandia National Laboratories
Dominic Forbush
Sandia National Laboratories
Steven Spencer
Sandia National Laboratories
Kevin Dullea
Sandia National Laboratories
Bret Bosma
Oregon State University
Pedro Lomonaco
Oregon State University

Keywords

MHK, Marine, Hydrokinetic, energy, power, control, system identification, foswec, wave tank, flap, closed loop control, surge converter, floating, oscillating, OSU, Oregon State University, O.H. Hinsdale Wave Research Laboratory, Directional Wave Basin, Hinsdale Wave Research Laboratory, causal, impedance matching, WEC, tank test, causal impedance

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