A. J. Garrido

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The worldwide demand for energy requires alternatives to fossil fuels and nuclear fission, so renewable resources, particularly ocean energy, are called to play a relevant role in a near future. In particular, the oscillating water column (OWC) is one of the most promising devices to harness energy from the sea, as it is the case of the Nereida project(More)
In this paper, an oscillating water column-based wave energy conversion plant is modeled and controlled by means of two complementary control strategies in order to improve the conversion of wave energy into electric power. This wave power generation system consists of a capture chamber, a Wells turbine, and an induction generator. The improvement relays on(More)
In this paper, a data acquisition module meeting the specifications of a wideband multistandard receiver test system is presented. It provides a high resolution over large bandwidth with only a low-jitter wideband sample-and-hold and an intermediate frequency analog-to-digital converter by means of subsampling. Using commercial devices on a multilayer(More)
Nuclear fusion has arisen as an alternative energy to avoid carbon dioxide emissions, being the tokamak a promising nuclear fusion reactor that uses a magnetic field to confine plasma in the shape of a torus. However, different kinds of magnetohydrodynamic instabilities may affect tokamak plasma equilibrium, causing severe reduction of particle confinement(More)
The Oscillating Water Column concept consists of two key elements, a turbine located in a pneumatic energy collection chamber and a doubly fed induction generator that converts energy extracted by the turbine into a form that can be returned to the network. Since the turbo-generator control requires the rotor angular velocity, removing the rotor speed(More)
The present work deals with the improvement of OWC-Wells turbine-generator systems by adequately choosing the applied control scheme. For this purpose, two different control strategies are presented and compared. In the first one, the control system does appropriately adapt the slip of the induction generator according to the pressure drop entry. The second(More)
Within the different types of on-shore wave-based ocean energy devices, Oscillating Water Column (OWC) converters are one of the widely used ones. This work deals with the modeling and simulation of OWC on-shore wave power plants. The study is particularized for the case of the Mutriku's MOWC power plant. The model for the wave, chamber and turbo-generator(More)
One of the main problems arising when dealing with Oscillating Water Column-based wave power generation plants equipped with Doubly-Fed Induction Generator, is the need of an adequate Fault-Ride-Through during voltage drops. In this paper it is proposed an innovative Fault-Ride-Through solution consisting of a control scheme that suitably coordinates the(More)
The suitability of distributed power generation systems working at medium and high capacity as it is the case of wave power generation plants, requires a reliable Fault-Ride-Through capability. When a grid fault occurs on the transmission system, the speed of the turbo-generator group increases uncontrolled, the induction generator injects large peak(More)
As a consequence of the continued increase in the worldwide demand of energy the need to achieve new sources of power has come out as a very important issue. In this sense, nuclear fusion has arisen to be a promising source of energy which has entailed an increasing interest in solving the different control problems existing in the nuclear fusion reactors(More)