Wave Energy Converter Concepts : Design Challenges and Classification

Czech, Balazs; Bauer, Pavol

doi:10.1109/mie.2012.2193290

Cited by 175 publications

(76 citation statements)

References 30 publications

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“…Its energy density is more available than either solar and wind energy [1]. Whereas, it has some design challenges because of the irregular sea or ocean wave characteristics and extreme weather conditions [2]. A wave energy converter (WEC) used for harvesting energy form the waves.…”

Section: Introductionmentioning

confidence: 99%

A PSO Tuned Fractional-Order PID Controlled Non-inverting Buck-Boost Converter for a Wave/UC Energy System

Şahin

2016

ijisae

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Abstract:In this study, a fractional order PID (FOPID) controller is designed and used to control a DC-DC non-inverting buck-boost converter (NIBBC) for a wave/ultra-capacitor (UC) energy system. Because of the energy discontinuities encountered in wave energy conversion systems (WECS), an UC is integrated to the WECS. In order to obtain the best controller performance, particle swarm optimization (PSO) is employed to find the optimum controller parameters. Integral of time weighted absolute error (ITAE) criteria is used as an objective function. Also, an optimized PID controller is designed to test the performance of the FOPID controller. The whole system is developed in Matlab/Simulink/SimPower environment. The simulation results show that the FOPID controller provides lower value performance indices than the PID controller in terms of reducing the output voltage sags and swells.

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Section: Introductionmentioning

confidence: 99%

A PSO Tuned Fractional-Order PID Controlled Non-inverting Buck-Boost Converter for a Wave/UC Energy System

Şahin

2016

ijisae

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“…There is also opportunity for technological integration between wave and wind energy [2]. Current wave energy converters (WECs) fall under four main categories: 1) oscillating water column (OWC); 2) attenuator; 3) overtopping; and 4) point absorber [3]- [6]. The RTI (Rohrer Technologies Inc.) F2 can be classified as an attenuator device, meaning the structure is oriented normal to oncoming waves.…”

Section: Introductionmentioning

confidence: 99%

Analysis of a Wave Front Parallel WEC Prototype

Sproul

Weise

2015

IEEE Trans. Sustain. Energy

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Nowadays, clean renewable energy extraction solutions are becoming a crucial practice in society. Many different sources are being developed including ocean energy and in specific, ocean waves. In deep water conditions, ocean waves can become very power dense, continuous, and forecastable. Wave height, velocity, and frequency are all variable wave characteristics making it challenging to capture wave power economically. The RTI F2 is a promising wave energy conversion device that is currently under research. Its method of power capture is a buoyant vessel oriented normal to oncoming waves. This paper discusses known control methods implemented on the RTI F2, the experimental setup used for control of the device, and wave tank testing done at the University of New Hampshire's Chase Laboratory. Experimental data was obtained across various wave conditions, plate angles, vessel weights, and control strategies. The results of these tests are presented in the subject matter.

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“…Although energy generation from ocean wave is not so cost competitive compared to wind and solar particularly, it has a huge potential in future and research is being carried out to explore various cost effective options. Research has been progressed well in designing several types of wave energy conversion (WEC) devices [1], designed to convert the wave energy into useful mechanical energy. Their design mostly depends on location of its installation in sea.…”

Section: Introductionmentioning

confidence: 99%

“…A reciprocating hydraulic compressor connected directly with the WEC device can pump fluid into a hydraulic accumulator [1] and the pressurized fluid can be released into a turbine to drive a generator. However, for power rating of several hundred kilowatts the hydraulic system can be complex and expensive.…”

Section: Introductionmentioning

confidence: 99%

Operation of doubly fed induction generator in ocean wave energy conversion system by stator phase sequence switching

Hazra

Bhattacharya

2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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This paper presents operation of a Doubly Fed Induction Generator (DFIG) to extract oscillatory power from ocean wave energy converter (WEC). DFIG has the advantage of generating power at both sub-synchronous and supersynchronous speed with only slip power to be handled by power converter at rotor side. At super-synchronous speed the rotor generates slip power along with the stator to take the net power generation above the generator power rating. Due to power generation capability above its rating, DFIG is a good candidate for WEC system. However, to operate DFIG in an oscillatory system where direction of rotor speed keeps changing it requires controlled supply from stator side as well. In this paper, a rotor side control method is proposed to operate the DFIG in oscillatory system with a low cost stator phase sequence switching circuit to adapt to the change of direction of the rotor speed. A suitable control scheme is proposed to control the machine flux during start up and speed reversal to eliminate current inrush at the stator side. The DFIG current is controlled in vector control method with control axes orientated along stator flux axis. The current controllers are designed to control the rotor side currents to produce power and to regulate machine flux in accordance with the wave energy converter dynamics. The system is modeled and simulated in MATLAB-Simulink platform to validate the proposed scheme. All the corresponding results are presented and discussed.

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Wave Energy Converter Concepts : Design Challenges and Classification

Cited by 175 publications

References 30 publications

A PSO Tuned Fractional-Order PID Controlled Non-inverting Buck-Boost Converter for a Wave/UC Energy System

A PSO Tuned Fractional-Order PID Controlled Non-inverting Buck-Boost Converter for a Wave/UC Energy System

Analysis of a Wave Front Parallel WEC Prototype

Operation of doubly fed induction generator in ocean wave energy conversion system by stator phase sequence switching

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