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Identification and Control of a River-Current-Turbine Generator—Application to a Full-Scale Prototype

Matthieu Hauck, Axel Rumeau, Antoneta Iuliana Bratcu, Seddik Bacha, Iulian Munteanu, Daniel Roye
2018 IEEE Transactions on Sustainable Energy  
Abstract--This paper reports on the operation assessment of an electrical power generation system based upon cross-flow water turbines.  ...  its rotational speed and to force its operation in the unstable region -the so-called active stall control.  ... 
doi:10.1109/tste.2017.2782759 fatcat:jkg674qqofgkxllr7b6jtmb2uy

Performance of an Ocean Energy Conversion System with DFIG Sensorless Control

I. Garrido, Aitor J. Garrido, M. Alberdi, M. Amundarain, O. Barambones
2013 Mathematical Problems in Engineering  
In this particular case, a Luenberger based observer is considered and the effectiveness of the proposed control is shown by numerical simulations.  ...  This is an experimental facility whose concept consists of a turbine located in a pneumatic energy collection chamber and a doubly fed induction generator that converts energy extracted by the turbine  ...  The bidirectional air flow is applied to a special kind of turbine, called Wells turbine, which provides unidirectional rotation despite of the air flow direction [5, 6] .  ... 
doi:10.1155/2013/260514 fatcat:l2alm6buzrhwhk3wlhfigmlcxq

An overview of wind energy-status 2002

Thomas Ackermann, Lennart Söder
2002 Renewable & Sustainable Energy Reviews  
This update was requested by Elsevier due to the large interest in wind power.   ...  The paper provides an overview of the historical development of wind energy technology and discusses the current world-wide status of grid-connected as well as stand-alone wind power generation.  ...  Acknowledgements The authors would like to thank ELFORSK (Swedish Electrical Utilities R&D Company), ABB Corporate Research and the Swedish Energy Authority for their sponsorship and collaboration in this  ... 
doi:10.1016/s1364-0321(02)00008-4 fatcat:5k4uinp6f5g5lagnqhnw34r3ym

Energy Conversion Strategies for Wind Energy System: Electrical, Mechanical and Material Aspects

Anudipta Chaudhuri, Rajkanya Datta, Muthuselvan Praveen Kumar, João Paulo Davim, Sumit Pramanik
2022 Materials  
The flow of power in WECS and its control strategies are also been described. The wind energy conversion is carried out with a suitable controlling mechanism for power grid integration.  ...  A maximum power-point tracking controller is an effective controlling method to extract the maximum possible power from the turbines.  ...  This strategy of control involves multiple stall controls for high wind speed regions.  ... 
doi:10.3390/ma15031232 pmid:35161176 pmcid:PMC8840529 fatcat:a643gaksevd4rcp57lp7lwmvmy

Analysis of Influence of Tilt Angle on Variable-Speed Fixed-Pitch Floating Offshore Wind Turbines for Optimizing Power Coefficient Using Experimental and CFD Models

Wongsakorn Wisatesajja, Wirachai Roynarin, Decha Intholo
2020 International Journal of Renewable Energy Development  
This study focused on optimization of the power coefficient of floating offshore wind turbines (FOWTs) to maintain their wind power performance in order to overcome problems with the tilt angle resulting  ...  The results of this study provide insights into a new concept of power coefficient optimization using variable tilt angle for small to medium fixed pitch FOWTs, to reduce the cost of pitch control systems  ...  I am grateful to the staff of the Energy Research and Service Centre (ERSC) of the Faculty of Engineering of RMUTT for allowing me to use the experiment resources.  ... 
doi:10.14710/ijred.2021.33195 fatcat:kwsadec4bzbcvgfe3bysx4lnvq

Flow Control in Wells Turbines for Harnessing Maximum Wave Power

Jon Lekube, Aitor Garrido, Izaskun Garrido, Erlantz Otaola, Javier Maseda
2018 Sensors  
It stands as the first wave power plant composed by more than one turbine and connected to the power grid [10] .  ...  Then, the control decisions are based on the pressure drop measured by pressure sensors located along the turbine.  ...  + 3 C t opt φ 2 opt + 1 ∂C t opt ∂ω t . (10) The turbine usually operates in a stalling-free region, that is to say, the flow coefficient should never overcome the value of 0.3 in normal operating conditions  ... 
doi:10.3390/s18020535 pmid:29439408 pmcid:PMC5855045 fatcat:kfhqwiyjwffjzjlj52o6usogsq

Simulation and Experimental Investigation of the Stay Vane Channel Flow in a Reversible Pump Turbine at Off-Design Conditions

Sandro Erne, Gernot Edinger, Anton Maly, Christian Bauer
2017 Periodica Polytechnica: Mechanical Engineering  
During simulation and measurement, a dominant rotating stall inception was observed near the design flow of the pump turbine.  ...  The focus is laid on transient CFD simulations of characteristic flow states in the stay vane channel when operating at off-design conditions in pump mode.  ...  Introduction Increasing the operational flexibility of a pumped storage power plant often involves an extension of the continuous operating range of the pump turbine.  ... 
doi:10.3311/ppme.9345 fatcat:65axvwpat5byzccl4bx6bsrk4i

Hydrodynamic changes imposed by tidal energy converters on extracting energy on a real case scenario

A. Pacheco, Ó. Ferreira
2016 Applied Energy  
loss by representing turbine characteristics close to the scale of the turbine. 30 31  ...  In the simulations, the drag coefficient is 25 set to be constant, which represents a fixed operational state of the turbine, and is a 26 limitation of coastal models of this type that cannot presently  ...  When the control system logs that the rotor is already operating in the stall regime and that the power is consistently 436 exceeding the maximum instantaneous output of around 50 kW then it will shut  ... 
doi:10.1016/j.apenergy.2016.07.132 fatcat:y7te63upjrco7b7udszmmfnm3q

Complementary Power Control for Doubly Fed Induction Generator-Based Tidal Stream Turbine Generation Plants

Khaoula Ghefiri, Soufiene Bouallègue, Izaskun Garrido, Aitor Garrido, Joseph Haggège
2017 Energies  
Analogously, when the system operates in power limitation mode, a pitch angle control is used to limit the power captured in the case of high tidal speeds.  ...  In this context, this paper presents a novel complementary control strategy aimed to maximize the output power of a Tidal Stream Turbine (TST) composed of a hydrodynamic turbine, a Doubly-Fed Induction  ...  Acknowledgments: This work was supported in part by the University of the Basque Country (Universidad  ... 
doi:10.3390/en10070862 fatcat:g2wyr4kjnrgq5b2pix4wfmbkdm

Wind Energy [chapter]

Markel Zubiaga
2012 Energy Transmission and Grid Integration of AC Offshore Wind Farms  
The regions around equator, at 0° latitude are heated more by the sun than the regions in the poles.  ...  The wind The unequal heat of the Earth surface by the sun is the main reason in the generation of the wind. So, wind energy is a converted form of solar energy.  ...  SCIGs directly connected to the grid do not have the capability of independent control of active and reactive power, therefore, the reactive power control is performed usually by mechanically switched  ... 
doi:10.5772/48891 fatcat:tufhqygo3zfgppo6hukj7d25wy

Hysteresis Characteristic in the Hump Region of a Pump-Turbine Model

Deyou Li, Hongjie Wang, Jinxia Chen, Torbjørn Nielsen, Daqing Qin, Xianzhu Wei
2016 Energies  
Finally, the type of the low-frequency vortices was analyzed through the cross power spectrum.  ...  When pump-turbines operate in the hump region, strong noise and serious fluctuations can be observed, which are harmful to their safe and stable operation and can even destroy the whole unit as well as  ...  of high level water of the reservoir or low frequency of the grid.  ... 
doi:10.3390/en9080620 fatcat:xucc2rsyznbspcd7ljyvk5afca

Influence of Clearance Flow on Dynamic Hydraulic Forces of Pump-Turbine during Runaway Transient Process

Xiaoxia Hou, Yongguang Cheng, Zhiyan Yang, Ke Liu, Xiaoxi Zhang, Demin Liu
2021 Energies  
The fluctuation of runner radial force is mainly caused by the flow evolution in MFC, however, the flow in CFC aggravates it.  ...  In CFC, strong rotating shear flow containing a velocity core region in the circumferential direction is formed, and rotational speed is the dominant factor.  ...  and spinning reserve in the power grid, to match with thermal, nuclear, wind and solar powers.  ... 
doi:10.3390/en14102830 fatcat:mdvjc7fhyneprejmsdxcvegdra

Application of particle image velocimetry to wind turbine wakes

J. Whale, Craig Anderson, J. M. Bessem, R. Booij, H. W. H. E. Godefroy, P. J. de Groot, K. K. Prasad, F. F. M. de Mul, E. J. Nijhof
1993 Fifth International Conference on Laser Anemometry: Advances and Applications  
This paper presents the results of a preliminary experimental study of the flow past a model turbine using Particle Image Velocimetry (PIV), a whole field velocimetry method, with a scanning beam system  ...  of flow illumination.  ...  Funding for this work was supplied by the Hackett Studentship of the University of Western Australia with additional financial support provided by the Overseas Research Award Scheme.  ... 
doi:10.1117/12.150563 fatcat:nc65wtqezjc7tfbjuork3g5qva

Geometric and Control Optimization of a Two Cross-Flow Turbine Array [article]

Isabel Scherl, Benjamin Strom, Steven L. Brunton, Brian L. Polagye
2020 arXiv   pre-print
Cross-flow turbines, also known as vertical-axis turbines, convert the kinetic energy in moving fluid to mechanical energy using blades that rotate about an axis perpendicular to the incoming flow.  ...  In this work, the performance of a two-turbine array in a recirculating water channel was experimentally optimized across sixty-four unique array configurations.  ...  The authors acknowledge Eric Clelland and the Bamfield Marine Science Centre for hosting experiments. The authors also acknowledge the support of their colleagues Noah Johnson and Hannah Ross.  ... 
arXiv:2007.09233v1 fatcat:7bb7o6c6cbhyvpfpghy52gr6de

The History and State of the Art of Variable-Speed Wind Turbine Technology

P. W. Carlin, A. S. Laxson, E. B. Muljadi
2003 Wind Energy  
to be of significance in the area of variable speed.  ...  ACKNOWLEDGEMENTS In assembling such a history no single author or source possesses all the necessary information.  ...  For the purposes of direct mechanical water pumping, this variable-speed operation works effectively.  ... 
doi:10.1002/we.77 fatcat:gnfvhiyxybeprke45ggrojrjxm
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