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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.


Papers
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Journal ArticleDOI
TL;DR: A linear-generator-based direct power conversion plant model to generate the electrical energy from ocean waves by using a diode bridge rectifier and a dc-link capacitor and the reliable multilevel inverter is proposed.
Abstract: The huge untapped energy from ocean waves is one of the ideal solutions for world energy crisis. This paper proposes a linear-generator-based direct power conversion plant model to generate the electrical energy from ocean waves. The linear generator output is of variable magnitude and variable frequency in nature. In this paper, this variable output is converted to fixed dc voltage by using a diode bridge rectifier and a dc-link capacitor. The linear generator along with a diode bridge and a capacitor forms a wave power unit. These wave power units can be connected in series and parallel to meet the power ratings. A reliable multilevel inverter is fed from the wave power units to ensure uninterrupted tapping of power from this abundant renewable energy source. The reliable inverter operation is analyzed under open- and short-circuit faults in switches by reconfiguring the carrier waves of sine pulsewidth modulation during fault conditions. A fault detection algorithm using a single sensor at the output is also proposed to detect the faults in the switches of the proposed reliable inverter. The proposed plant model with a linear generator and a reliable inverter is simulated using ANSYS MAXWELL and MATLAB/Simulink. The plant model is tested using a programmable ac source for emulating the linear generator and the developed prototype of the diode bridge rectifier and the reliable multilevel inverter.

30 citations

Journal ArticleDOI
TL;DR: In this article, the statistical distribution of chorus wave power in the off-equatorial region was evaluated using data from the PWI Sweep Frequency Receiver (SFR) on board the Polar spacecraft.
Abstract: [1] The statistical distribution of chorus wave power in the off-equatorial region is evaluated using data from the Plasma Wave Instrument (PWI) Sweep Frequency Receiver (SFR) on board the Polar spacecraft. Maps of average wave power in the meridional plane divided into four local time sectors are presented. The geomagnetic dependence of wave power is examined, and substorm activity and enhanced solar wind speed result in distinctly different wave distributions. The maximum latitudinal extent of chorus as a function of latitude and L* is estimated within the orbit constraints of the spacecraft, and on the basis of this the corresponding minimum resonant energy for first-order relativistic cyclotron resonance is calculated using a realistic magnetic field model.

29 citations

Journal ArticleDOI
TL;DR: In this article, the use of optimal control techniques for improving the energy absorption by a wave-energy converter (WEC) is investigated, and an optimal control strategy based on variations of a Lagrange functional is determined, which gives a set of adjoint equations in addition to the state equations as a necessary condition for optimum.
Abstract: In this paper, the use of optimal control techniques for improving the energy absorption by a wave-energy converter (WEC) is investigated. A mathematical model is developed for a floating body, which is exposed to an irregular incident wave, and is moving relative to a fixed reference. This model includes a control force from the power take-off and control machinery, and a friction force which restricts the oscillation amplitude. This force models end-stop devices, which are necessary to protect the machinery. An optimal control strategy is determined, based on variations of a Lagrange functional. This gives a set of adjoint equations in addition to the state equations, as a necessary condition for optimum. An algorithm is given for solving the problem numerically by iteration, based on a gradient method. It is shown that the optimal motion in a sinusoidal wave is not sinusoidal when the excursion is constrained. Instead, the motion should be stopped in certain intervals. In irregular waves the constrained solution is close to the unconstrained solution when the excursion is small. Moreover, the timings of the extrema and of the zero crossings agree fairly well. When the excursion is constrained, the mean output power is reduced compared tomore » the unconstrained case, but the ratio between the output energy and the total energy passing through the machinery is increased. This means that the conversion efficiency of the machinery is less critical.« less

29 citations

Journal ArticleDOI
TL;DR: In this article, the authors evaluate the near future wave power resources (2021-2050) in the Black Sea, based on the results coming from a wave modelling system forced with wind fields provided by a Regional Climate Model (RCM).

29 citations

Journal ArticleDOI
TL;DR: In this article, the authors analyzed how changes in wave patterns, due to the effect of climate change, can affect wave energy power and yield around Menorca (NW Mediterranean Sea).

29 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202349
2022117
2021111
2020142
2019137
2018138