Graduate Thesis Or Dissertation
 

Validation of Wave Energy Converter Models and the Development of Control Strategies in WEC-Sim

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/z316q655j

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  • 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. An advantage of ocean wave power is that it is generally more predictable. 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 coastline of length 50 km translates to 2 GW of capacity (approximately 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.
  • Keywords: Oscillating Water Column, Simulation, Validation, Control, Model Predictive Control, Wave Energy Converters, Experiment, WEC-Sim
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