Modeling and controller implementation of tidal turbine for Indian remote islands
18 Jul 2016-pp 279-284
TL;DR: In this paper, the development and implementation of a control strategy for a horizontal axis turbine using the Blade Element Momentum (BEM) approach as the hydrodynamic model and generator (DFIG) control is discussed.
Abstract: Marine tidal energy extraction faces multi-fold challenges during design, installation, operation and grid-connection. The control of turbine speed with tidal variation is vital to get a steady power output from the turbines during the operation phase throughout the year. This paper deals with the development and implementation of a control strategy for a horizontal axis turbine using the Blade Element Momentum (BEM) approach as the hydrodynamic model and generator (DFIG) control. A control efficiency of 71% is achieved between the system's overall and the hydrodynamic power of a small scale turbine. It is also shown that the generator speed can be well maintained to operate in a super-synchronous mode.
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01 Dec 2020
TL;DR: In this paper, the present scenario and future prospects of the energy sources for all the Indian islands are discussed, and data collected from different buoys of INCOIS are analyzed, and a location near Minicoy has been chosen for further study.
Abstract: The islands in the Indian Ocean as other remote islands are often challenged to meet their energy needs, and constantly getting electricity from the mainland is expensive. In this article, the present scenario and future prospects of the energy sources for all the Indian islands are discussed. Data collected from different buoys of INCOIS are analysed, and a location near Minicoy has been chosen for further study. This paper also provides the preliminary analysis of marine current energy feasibility in that location.
6 citations
TL;DR: In this article, the authors investigated the hydrodynamic performance of a dual-rotor horizontal axis marine turbine (HAMCT) for the power gain in operating the rear rotor without blade-pitch control.
Abstract: The hydrodynamic performance of a dual-rotor horizontal axis marine turbine (HAMCT) is investigated for the power gain in operating the rear rotor without blade-pitch control. This kind of turbine can be advantageous for a rectilinear tidal current of reversing directions, where each rotor blade is optimally fixed-pitched towards its upstream velocity. The blade element momentum (BEM) method is coupled with the Park wake model. A generic three-blade turbine is shown to gain up to 20% in the coefficient of power CP as relative to the front rotor CP when operating the rear rotor at the same tip speed ratio (TSR) as the front one, gaining overall CP up to 0.55. Analytic model is derived to backup the estimate of power gain. Plots for turbine performance variation with TSR and profile hydrodynamic efficiency are given, and analysed for lab and small-medium size turbines.
3 citations
Cites background from "Modeling and controller implementat..."
...One way is to leave the rear rotor stationary, another option is to use rotational speed control that is common in marine turbines (Benelghali et al 2007, Singha et al 2016 and Zhu et al 2017) in order to maximise energy extraction from the rear rotor....
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01 Dec 2020
2 citations
References
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Book•
01 Jan 2010
TL;DR: Marine Propellers and Propulsion as discussed by the authors provides comprehensive and cutting edge coverage to equip marine engineers, naval architects and anyone involved in propulsion and hydrodynamics with the knowledge needed to do the job.
Abstract: Propulsion technology is a complex, multidisciplinary topic with design, construction, operational and research implications Bringing together a wealth of disparate information from the field, "Marine Propellers and Propulsion" provides comprehensive and cutting edge coverage to equip marine engineers, naval architects and anyone involved in propulsion and hydrodynamics with the knowledge needed to do the job Drawing on experience from a long and varied career in consultancy, research, design and technical investigation, author John Carlton breaks the subject into three main sections-hydrodynamic theory, materials and mechanical considerations, and design, operation and performance Connecting essential theory to practical problems in design, analysis and operational efficiency, "Marine Propellers and Propulsion" is an invaluable resource, packed with hard-won insights, detailed specifications and data This is the most complete book available on marine propellers, fully updated and revised, with new chapters on propulsion in ice and high speed propellers It gathers together otherwise disparate material on the theory and practice of propulsion technology from the past 40 years' development, including the latest developments in improving efficiency It is written by a leading expert on propeller technology, essential for students, marine engineers and naval architects involved in propulsion and hydrodynamics
632 citations
"Modeling and controller implementat..." refers background in this paper
...It can extract tidal current energy from bi-directional tidal flow by changing the pitch angle of the tidal turbines by 180° when the flow reverses itself [7]....
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01 Jul 2000
TL;DR: In this article, a stator flux linkage oriented control scheme for power and speed control with and without the use of a rotor position encoder is examined. And a sensorless speed control mechanism for the doubly-fed induction machine (DFM) is presented.
Abstract: The control of a doubly-fed induction machine (DFM) with and without the use of a rotor position encoder is examined. First, a stator flux linkage oriented control scheme for power and speed control with a position encoder, shows the high performance control capabilities of this control arrangement and serves as foundation for the sensorless scheme. The power-control method is then applied to a sensorless method, based on a previous control arrangement. This method is then extended to derive a sensorless speed-control mechanism for the DFM. All control schemes are implemented and performed on an experimental test system, comprising two 80C167 microcontrollers and a 2.25 kW wound rotor induction machine.
321 citations
"Modeling and controller implementat..." refers methods in this paper
...There are several methods by which this can be done [13]....
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TL;DR: In this paper, the concept of array layouts is discussed and an appropriate and clear classification that can aid developers in understanding how arrays operate is proposed, supported by experimental studies conducted using several arrangements of multiple actuator disks to simulate early generation marine current energy converter arrays.
185 citations
01 Nov 1999
TL;DR: In this article, the use of vector control principles to control torque, speed, active and reactive power of a brushless doubly-fed induction machine (CDFM) is investigated.
Abstract: A cascaded doubly-fed induction machine (CDFM) is a connection of two wound rotor induction machines. In comparison to a single doubly-fed induction machine (SDFM) brushes are obsolete. Due to recent developments in brushless doubly-fed machine design, there is a renewed interest in associated control. Theoretical and experimental studies of a stator flux oriented control method for a CDFM are presented. The use of vector control principles to control torque, speed, active and reactive power is investigated. It is found that the additional closed rotor circuit of the CDFM introduces a cross coupling between the d-axis and the q-axis. Nevertheless, the cross coupling effect remains small in relation to the overall control concept so that the control of the CDFM resembles that of the SDFM. List of symbols Abbreviations: SDFM - CDFM - SF-CDFM = - single doubly-fed induction machine cascaded doubly-fed induction machine single frame cascaded doubly-fed induc- tion machine brushless doubly-fed induction machine doubly-fed reluctance machine microcontroller pulse width modulation
126 citations
01 Jun 2004
TL;DR: In this article, an investigation has been carried out into the lift, drag and cavitation characteristics of two-dimensional foil sections which may typically be used as a starting point in the design of blade sections for marine current turbines.
Abstract: An investigation has been carried out into the lift, drag and cavitation characteristics of two-dimensional foil sections which may typically be used as a starting point in the design of blade sections for marine current turbines. Cavitation tunnel experiments and numerical predictions using a panel code were carried out on four representative sections derived from the NACA series 4415, 6615, 63-215 and 63-815. The experimental lift and drag results show reasonable correlation with published wind tunnel data. The sections were modelled numerically using the 2-D panel code XFoil. The numerical cavitation predictions in most cases showed satisfactory agreement with the experiments and it is considered that such predictions could be used with reasonable confidence for predicting cavitation at the preliminary design stage. Overall, the results of the investigation provide detailed information which should assist in the design and operation of marine current turbines
102 citations