Topic
Wave power
About: Wave power is a research topic. Over the lifetime, 2671 publications have been published within this topic receiving 41439 citations. The topic is also known as: wind wave energy & sea wave energy.
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TL;DR: In this article, an offshore dual-chamber oscilating water colum (OWC) system composed of two closely connected 3D circular sub-units aligned in the direction of wave propagation is proposed and investigated under the framework of CFD toolbox OpenFOAM.
16 citations
TL;DR: Experimentation demonstrates that both the voltage control accuracy and system robustness can be guaranteed with the proposed complementary power generation control scheme.
16 citations
TL;DR: In this paper, a high efficient relativistic backward wave oscillator with coaxial non-uniform slow-wave structures (SWSs) and depth-tunable extractor is presented.
Abstract: A high efficient relativistic backward wave oscillator with coaxial nonuniform slow-wave structures (SWSs) and depth-tunable extractor is presented. The physical mechanism to increase the power efficiency is investigated theoretically and experimentally. It is shown that the nonuniform SWSs, the guiding magnetic field distribution, and the coaxial extractor depth play key roles in the enhancement of the beam-wave power conversion efficiency. The experimental results show that a 1.609 GHz, 2.3 GW microwave can be generated when the diode voltage is 890 kV and the beam current is 7.7 kA. The corresponding power efficiency reaches 33.6%.
16 citations
15 May 2005
TL;DR: In this article, an impulse turbine is used to convert differential air pressure due to the oscillating water column into mechanical shaft power, which is rectified to DC by a diode bridge.
Abstract: Despite several wave energy plants based on oscillating water column concept having been tested worldwide, wave energy has not yet gained popularity as a renewable energy source because of highly intermittent nature of available wave power. Still maintaining a constant voltage and frequency at the output, requires embedding of energy storage devices of sufficient capacity into the system. As the first stage, an impulse turbine is used to convert differential air pressure due to the oscillating water column into mechanical shaft power. A permanent magnet based alternator driven by this turbine generates variable voltage variable frequency AC, which is rectified to DC by a diode bridge. At the second stage, a DC motor - alternator set converts this into fixed frequency, fixed voltage AC acceptable as a utility AC supply. Employing MATLAB-Simulink based steady-state model of the plant and assuming an adjustable load, PID control of the output load is carried out in order to estimate the energy storage requirement especially under different climatic conditions
16 citations
TL;DR: In this article, an intermediate marine substation is proposed to grid-connect an offshore wave power farm, and the control procedure for grid connection of the WECs is described step-by-step.
16 citations