Oregon State University

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PhD Final Examination – Ratanak So


Friday, April 28, 2017 12:00 PM - 2:00 PM

Validation of Wave Energy Converter Models and the Development of Control Strategies in WEC-Sim
When the term renewable energy is mentioned in a conversation, wind, solar, and hydro energy typically come to mind. However, there is one major resource that has remained mostly untapped, wave energy. Wind and solar power technologies are well established around the world but they cannot generate electricity all the time; wind is not always blowing and the sun is not always shining. In other words, they are less predictable compared to waves. Furthermore, water is significantly denser -- about 800 times -- compared to air, so it can carry more energy than wind per volume. A meter wide of incident wave front can provide about 40 kW (along the coast of Oregon or Washington) which can power about 20 homes; a 50 km stretch of coastline translates to 2 GW of capacity (1 million homes) which is equivalent to a large hydroelectric power plant in the U.S. The details of the work presented herein is 1) a comparison of a wave energy converter's (WEC) field test performance to a simulated expected results of the same device using WEC-Sim, an open-source simulator; 2) a comparison of a tank test performance of an oscillating water column and simulation results of a point absorber using WEC-Sim; and 3) development of model predictive control (MPC), latching & declutching, and linear quadratic Gaussian regulator (LQG) control strategies for WEC-Sim.

Major Advisor: Ted Brekken
Committee: Eduardo Cotilla-Sanchez
Committee: Julia Zhang
Committee: Belinda Batten
GCR: Janet Nishihara


Kelley Engineering Center (campus map)
1007
Calvin Highes
1 541 737 3168
Calvin.Hughes at oregonstate.edu
Sch Elect Engr/Comp Sci
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