Power Generation Optimization From Sea Waves by Using a Permanent Magnet Linear Generator Drive

Kimoulakis, N.M.; Kladas, Antonios G.; Tegopoulos, J.A.

doi:10.1109/tmag.2007.914854

Cited by 62 publications

(24 citation statements)

References 6 publications

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“…The turbines drive three induction generators to produce a three-phase AC output at 200 Volts. More research has been done by Cunha et al (2009), Elwood et al (2010, Eriksson et al (2005), Haniotis et al (2002), Kimoulakis et al (2008), Leonard et al (2000), Leijon et al (2005), Mueller and Baker (2002), Rhinefrank et al (2006), and Wolfbrandt (2006). These systems all share the same difficulty in converting the oscillatory motion of waves to the rotation of a permanent magnet generator.…”

Section: Existing Wave Power Generation Technologiesmentioning

confidence: 99%

“…Intuition suggests that the load should be applied while the shaft RPM is high above some threshold, and it should be disconnected while it becomes low. Furthermore, the electrical load should be controlled such that: 1. least load is applied in the down stroke when there is no wave force and 2. the oscillating velocity of the system is in phase with the wave's excitation force acting on the system (Kimoulakis & Kladas, 2008). Usually the oscillating velocity of the buoy is out of phase with the wave's excitation force.…”

Section: Electrical Load Control Optimizationmentioning

confidence: 99%

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

Velez¹,

Qu²,

Lin³

et al. 2014

mar technol soc j

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A B S T R A C TOcean 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.

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Section: Existing Wave Power Generation Technologiesmentioning

confidence: 99%

Section: Electrical Load Control Optimizationmentioning

confidence: 99%

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

Velez¹,

Qu²,

Lin³

et al. 2014

mar technol soc j

View full text Add to dashboard Cite

show abstract

“…In Fig. 5 is given the flux linkage variation in one stator coil of the linear generator in respect to the current of the coil and the displacement of the translator, where the effect of the magnetic saturation is visible [1].…”

Section: Construction Of Electromechanical Systemmentioning

confidence: 99%

Modeling and control of a coupled electromechanical system exploiting heave motion, for energy conversion from sea waves

Kimoulakis

Kladas

2008

2008 IEEE Power Electronics Specialists Conference

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The paper presents the design procedure and the modelling of performance for a special coupled electromechanical system, for use in sea wave energy extraction applications. The system is consisted of a specific linear permanent magnet generator combined with a cylindrical floating buoy moving due to the sea wave incidence. The system analysis requires particularly developed electromagnetic -mechanical -hydraulic simulation models. The proposed models suitability has been checked through measurements in a 16 kW prototype power plant.

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“…Because of this, there are significant challenges for power grids to manage the stability, security and reliability while smoothing the generated power and thus make the best use of renewable energy sources [4]. At present, the major linear generators used for wave energy extraction are permanent magnet (PM) linear synchronous machines that usually have PMs on the translator [5], [6]. The traditional linear generators have the disadvantages of complex translator structure and unexpected translator temperature rise, which might cause irreversible demagnetization of magnets and mechanical damage [7].…”

Section: Introductionmentioning

confidence: 99%

Analysis and design of a novel linear generator for harvesting oceanic wave energy

Farrok

Islam

Sheikh

et al. 2015

2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD)

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Abstract-In almost every permanent magnet linear generator (PMLG), demagnetization would greatly degrade the electricity generation capability over time. This paper proposes a novel PMLG which consists of a permanent magnet excitation generator (PMEG) to supply electrical excitation to the field winding of an electromagnetic linear generator (EMLG) which functions as the main power generator. The proposed generator can reduce the demagnetization problem of the conventional PMLG. The finite element Analysis is performed by using the commercial software package ANSYS/ANSOFT for designing the proposed PMLG, and the genetic algorithm has been used to find the optimal pole size, pole pitch, air gap length and load variation to maximize the output power. Special m-shaped stator core is designed for the PMEG to minimize the leakage flux and cogging force. The voltage, current, power, magnetic flux density, force components and applied force are also analyzed and discussed.

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Power Generation Optimization From Sea Waves by Using a Permanent Magnet Linear Generator Drive

Cited by 62 publications

References 6 publications

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

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

Modeling and control of a coupled electromechanical system exploiting heave motion, for energy conversion from sea waves

Analysis and design of a novel linear generator for harvesting oceanic wave energy

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