Design, Modeling and Optimization of an Ocean Wave Power Generation Buoy

Ocean waves provide an abundant, clean, and renewable source of energy. Existing systems, typically hydraulic turbines powered by high-pressure fluids, are very large in size and costly. Additionally, they require large ocean waves in which to operate. This paper details the design, development, and laboratory prototype testing of a wave power generation system comprising a buoy that houses a set of mechanical devices and a permanent magnetic generator. The buoy, floating on the surface of the ocean, utilizes the vertical movement of ocean waves to pull on a chain anchored to the ocean floor. The linear motion is translated into rotation, which rotates a shaft to move armature coils within the generator to produce an electric current. The amount of energy generated increases with wave height and input frequency. The flywheel inertia, shaft rotation speed, and electrical load are optimized to provide maximize electricity production. The paper addresses the design, analysis, and implementation of mechanical and electrical systems, together with resistive load control, system optimization, and performance analysis. Both simulation and experimental results are provided and compared.