Thematische Bibliographien / Blade pitch control

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Auswahl der wissenschaftlichen Literatur zum Thema „Blade pitch control“

Autor: Grafiati

Veröffentlicht am 29. Juni 2021

Zuletzt aktualisiert am 9. Februar 2022

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Zeitschriftenartikel zum Thema "Blade pitch control"

Chen, Lei, und Zhen Luo. „The Realization of Individual Pitch Control“. Applied Mechanics and Materials 291-294 (Februar 2013): 477–80. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.477.

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This paper describes the classical individual pitch control algorithm. Firstly, transform the out-of-plane bending moment of each blade in the rotational coordinate to the hub loads proportional to the tilt and yaw moment in the fixed coordinate. Secondly, design the PI controllers to minimize the load. And then attach the increment pitch angle to the collective one. Simulations in the Bladed show that the individual pitch control can minimize the loads not only in hub tilt and yaw, but also in blade root.

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Samani, Arash E., Jeroen D. M. De Kooning, Nezmin Kayedpour, Narender Singh und Lieven Vandevelde. „The Impact of Pitch-To-Stall and Pitch-To-Feather Control on the Structural Loads and the Pitch Mechanism of a Wind Turbine“. Energies 13, Nr. 17 (01.09.2020): 4503. http://dx.doi.org/10.3390/en13174503.

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This article investigates the impact of the pitch-to-stall and pitch-to-feather control concepts on horizontal axis wind turbines (HAWTs) with different blade designs. Pitch-to-feather control is widely used to limit the power output of wind turbines in high wind speed conditions. However, stall control has not been taken forward in the industry because of the low predictability of stalled rotor aerodynamics. Despite this drawback, this article investigates the possible advantages of this control concept when compared to pitch-to-feather control with an emphasis on the control performance and its impact on the pitch mechanism and structural loads. In this study, three HAWTs with different blade designs, i.e., untwisted, stall-regulated, and pitch-regulated blades, are investigated. The control system is validated in both uniform and turbulent wind speed. The results show that pitch-to-stall control enhances the constant power control for wind turbines with untwisted and stall-regulated blade designs. Stall control alleviates the fore-aft tower loading and the blades flapwise moment of the wind turbine with stall-regulated blades in uniform winds. However, in turbulent winds, the flapwise moment increases to a certain extent as compared to pitch-to-feather control. Moreover, pitch-to-stall control considerably reduces the summed blade pitch movement, despite that it increases the risk of surface damage in the rolling bearings due to oscillating movements with a small amplitude.

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Liu, Liqun, Chunxia Liu und Xuyang Zheng. „Modeling, Simulation, Hardware Implementation of a Novel Variable Pitch Control for H-Type Vertical Axis Wind Turbine“. Journal of Electrical Engineering 66, Nr. 5 (01.09.2015): 264–69. http://dx.doi.org/10.2478/jee-2015-0043.

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Abstract It is well known that the fixed pitch vertical axis wind turbine (FP-VAWT) has some disadvantages such as the low start-up torque and inefficient output efficiency. In this paper, the variable pitch vertical axis wind turbine (VP-VAWT) is analyzed to improve the output characteristics of FP-VAWT by discussing the force of the six blade H type vertical axis wind turbine (VAWT) under the stationary and rotating conditions using built the H-type VAWT model. First, the force of single blade at variable pitch and fixed pitch is analyzed, respectively. Then, the resultant force of six blades at different pitch is gained. Finally, a variable pitch control method based on a six blade H type VP-VAWT is proposed, moreover, the technical analysis and simulation results validate that the variable pitch method can improve the start-up torque of VAWT, and increase the utilization efficiency of wind energy, and reduce the blade oscillation, as comparable with that of FP-VAWT.

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Stol, Karl A., Wenxin Zhao und Alan D. Wright. „Individual Blade Pitch Control for the Controls Advanced Research Turbine (CART)“. Journal of Solar Energy Engineering 128, Nr. 4 (26.07.2006): 498–505. http://dx.doi.org/10.1115/1.2349542.

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Pitching the individual blades of a horizontal-axis wind turbine allows control of asymmetric aerodynamic loads, which in turn influences structural loads in the nonrotating frame such as tower side-side bending. These loads are not easily controlled by traditional collective pitch algorithms. This paper presents the design of individual pitch control systems for implementation on the Controls Advanced Research Turbine (CART) in Colorado to verify controller performance for load attenuation. The control designs are based on linear time-periodic state-space models of the turbine and use optimal control methods for gain calculation. Comparisons are made between new individual pitch, new collective pitch, and baseline controller performance in both above rated and below rated wind conditions. Results from simulations show the potential of individual pitch to reduce tower side-side fatigue damage in above rated wind speeds (by 70% compared to baseline control) but with no improvement over collective pitch in below rated wind speeds. Fatigue load reductions in tower fore-aft, shaft torsion, and blade flap are also observed. From 13h of field testing, both collective and individual pitch controllers achieve a reduction in fatigue damage. However, the superior performance of individual pitch control observed in simulation was not verified by the field test results.

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Paraschivoiu, I., O. Trifu und F. Saeed. „H-Darrieus Wind Turbine with Blade Pitch Control“. International Journal of Rotating Machinery 2009 (2009): 1–7. http://dx.doi.org/10.1155/2009/505343.

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A procedure for computing the optimal variation of the blades' pitch angle of an H-Darrieus wind turbine that maximizes its torque at given operational conditions is proposed and presented along with the results obtained on a 7 kW prototype. The CARDAAV code, based on the “Double-Multiple Streamtube” model developed by the first author, is used to determine the performances of the straight-bladed vertical axis wind turbine. This was coupled with a genetic algorithm optimizer. The azimuthal variation of the blades' pitch angle is modeled with an analytical function whose coefficients are used as variables in the optimization process. Two types of variations were considered for the pitch angle: a simple sinusoidal one and one which is more general, relating closely the blades' pitch to the local flow conditions along their circular path. A gain of almost 30% in the annual energy production was obtained with the polynomial optimal pitch control.

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Navalkar, S. T., J. W. van Wingerden und G. A. M. van Kuik. „Individual blade pitch for yaw control“. Journal of Physics: Conference Series 524 (16.06.2014): 012057. http://dx.doi.org/10.1088/1742-6596/524/1/012057.

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Kong, Yi Gang, Hao Gu, Jie Wang und Zhi Xin Wang. „Hydraulic Variable Pitch Control and Aerodynamic Load Analysis for Wind Turbine Blades“. Advanced Materials Research 201-203 (Februar 2011): 590–93. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.590.

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This paper reviews the principle of power production, and analyses the influnece on aerodynamic load and output power due to the variation of pitch angle. For three-bladed upwind horizontal axis wind turbine, the blade pitch control is used primarily to adjust the power coefficient and obtain the optimal power at high wind speed, but it also make aerodynamic load, such as edgewise, flapwise and torsion moment, change during variable pitch control. Hydraulic mechanism is used in a process requiring large driving forces and torques, fast response and high stiffness. Therefore, the variable pitch mechanism is operated using electro-hydraulic proportional technology in this paper. Simulation results are presented and analysed to show that aerodynamic load and output power are sensitivity to pitch angle for wind turbine blade. These works lay foundation for the further studying of individual pitch, power control, fatigue and dynamical stability for wind turbine.

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Stanisławski, Jarosław. „Simulation of Boundary States of Helicopter Flight“. Journal of KONES 26, Nr. 2 (01.06.2019): 137–44. http://dx.doi.org/10.2478/kones-2019-0042.

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Abstract Results of simulation of main rotor blade loads and deformations, which can be generated during boundary states of helicopter flight, are presented. Concerned cases of flight envelope include hover at maximum height, level flight at high velocity, pull-up manoeuvres applying cyclic pitch and mixed collective and cyclic control. The simulation calculations were executed for data of light helicopter with three-bladed articulated rotor. For analysis, the real blades are treated as elastic axes with distributed masses of blade segments. The model of deformable blade allows for out-of-plane bending, in plane bending, and torsion. For assumed flight state of helicopter, the equations of rotor blades motion are solved applying Runge-Kutta method. According to Galerkin method, for each concerned azimuthal position of blade the parameters of its motions are assumed as a combination of considered bending and torsion eigen modes of the blade. The loads of rotor blades generated during flight depend due to velocity of flight, helicopter mass, position of rotor axis in air and deflections of swashplate that correspond to collective and cyclic pitch angle applied to rotor blades. The results of simulations presenting rotor loads and blade deformations are shown in form of time-runs and as plots of rotor-disk distributions. The simulations of helicopter flight states may be useful for prediction the conditions of flight-tests without exceeding safety boundaries or may help to define limitations for manoeuvre and control of helicopter.

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Liang, Ying-bin, Li-xun Zhang, Er-xiao Li und Feng-yue Zhang. „Blade pitch control of straight-bladed vertical axis wind turbine“. Journal of Central South University 23, Nr. 5 (Mai 2016): 1106–14. http://dx.doi.org/10.1007/s11771-016-0360-0.

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McNerney, G. „Unintended Stalling of the USW 56-100 During Optimum Pitch Control Operation“. Journal of Solar Energy Engineering 116, Nr. 3 (01.08.1994): 153–57. http://dx.doi.org/10.1115/1.2930075.

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The U.S. Windpower 56-100 is a three-bladed, free yaw wind turbine, using full span blade pitch control for power regulation. It is theoretically possible to increase the energy capture of the 56-100 by adjusting the blade angle to the optimum pitch angle on a continuing basis at below rated speeds. This concept was field tested on the 56-100, but it was found that the optimum pitch control logic opens a pathway for the 56-100 to fall into stall operation when the winds are above the rated wind speed. The 56-100 then operates as a stall-regulated wind turbine with an overall reduction of energy capture and an increase in system loads.

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Dissertationen zum Thema "Blade pitch control"

Lio, Wai Hou. „Blade-pitch control for wind turbine load reductions“. Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/16527/.

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Large wind turbines are subjected to the harmful loads that arise from the spatially uneven and temporally unsteady oncoming wind. Such loads are the known sources of fatigue damage that reduce the turbine operational lifetime, ultimately increasing the cost of wind energy to the end users. In recent years, a substantial amount of studies has focused on blade pitch control and the use of real-time wind measurements, with the aim of attenuating the structural loads on the turbine blades and rotor. However, many of the research challenges still remain unsolved. For example, there exist many classes of blade individual pitch control (IPC) techniques but the link between these different but competing IPC strategies was not well investigated. In addition, another example is that many studies employed model predictive control (MPC) for its capability to handle the constraints of the blade pitch actuators and the measurement of the approaching wind, but often, wind turbine control design specifications are provided in frequency-domain that is not well taken into account by the standard MPC. To address the missing links in various classes of the IPCs, this thesis aims to investigate and understand the similarities and differences between each of their performance. The results suggest that the choice of IPC designs rests largely with preferences and implementation simplicity. Based on these insights, a particular class of the IPCs lends itself readily for extracting tower motion from measurements of the blade loads. Thus, this thesis further proposes a tower load reduction control strategy based solely upon the blade load sensors. To tackle the problem of MPC on wind turbines, this thesis presents an MPC layer design upon a pre-determined robust output-feedback controller. The MPC layer handles purely the feed-forward and constraint knowledge, whilst retaining the nominal robustness and frequency-domain properties of the pre-determined closed-loop. Thus, from an industrial perspective, the separate nature of the proposed control structure offers many immediate benefits. Firstly, the MPC control can be implemented without replacing the existing feedback controller. Furthermore, it provides a clear framework to quantify the benefits in the use of advance real-time measurements over the nominal output-feedback strategy.

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Harson, Andrew. „A blade angle control system for large variable pitch fans“. Thesis, Queen's University Belfast, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334529.

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Namik, Hazim. „Individual blade pitch and disturbance accommodating control of floating offshore wind turbines“. Thesis, University of Auckland, 2012. http://hdl.handle.net/2292/11198.

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Floating wind turbines offer a feasible solution for going further offshore into deep waters. However, using a floating platform introduces additional motions that must be taken into account actively or passively. Therefore, the control system becomes an important component in controlling these motions. In this work, the development, implementation, and simulation of multi-objective state feedback and disturbance accommodating controllers applied on the three main floating concepts are described. The three concepts are the barge, tension leg, and spar-buoy floating platforms. These controllers utilise individual blade pitching to create asymmetric aerodynamic loads in addition to the symmetric loads created by collective blade pitching to increase the platform restoring moments. Simulation results, according to design load case 1.2 of the IEC 61400-3 standard for offshore wind turbines, show that state feedback controllers improve the performance relative to a collective blade pitch gain scheduled proportional-integral controller in terms of power and rotor speed regulation as well as reducing tower fore-aft and side-side bending loads. However, the magnitude of the improvements depends on the dynamics of each platform, its responsiveness to individual blade pitching and sensitivities to external wind and wave disturbances. Furthermore, interesting physical phenomena, such as the platform roll to pitch coupling caused by the controller, are identified. Disturbance accommodating controllers for rejecting wind speed perturbations further improve rotor speed regulation and reduce tower fore-aft bending loads except on the barge platform; the barge platform motion is dominated by incident waves and therefore rejecting wind speed perturbations has no noticeable impact. Wave moment disturbance rejection is also investigated but in a limited case study. While the approach taken can theoretically cancel the effects of incident wave moments, practically, the required actuation force cannot be generated by the wind turbine blades. Furthermore, using the blades for rejecting wave moments increases the tower bending due to the load path of the restoring moment through the tower. Out of the three investigated platforms, the tension leg platform with a disturbance accommodating controller has the best overall performance with fatigue loads close or less than that of an onshore wind turbine. The other two platforms, in their current design form, experience large tower fore-aft bending loads that would prevent them from being deployed in rough sea conditions.

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Bhattarai, Kripesh. „On the Use of a Digital Communication Channel for Feedback in a Position Control System“. University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1353512595.

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Den, Heijer Francois Malan. „Development of an active pitch control system for wind turbines / F.M. den Heijer“. Thesis, North-West University, 2008. http://hdl.handle.net/10394/2635.

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A wind turbine needs to be controlled to ensure its safe and optimal operation, especially during high wind speeds. The most common control objectives are to limit the power and rotational speed of the wind turbine by using pitch control. Aero Energy is a company based in Potchefstroom, South Africa, that has been developing and manufacturing wind turbine blades since 2000. Their most popular product is the AE1kW blades. The blades have a tendency to over-speed in high wind speeds and the cut-in wind speed must be improved. The objective of this study was to develop an active pitch control system for wind turbines. A prototype active pitch control system had to be developed for the AE1kW blades. The objectives of the control system are to protect the wind turbine from over-speeding and to improve start-up performance. An accurate model was firstly developed to predict a wind turbine’s performance with active pitch control. The active pitch control was implemented by means of a two-stage centrifugal governor. The governor uses negative or stalling pitch control. The first linear stage uses a soft spring to provide improved start-up performance. The second non-linear stage uses a hard spring to provide over-speed protection. The governor was manufactured and then tested with the AE1kW blades. The governor achieved both the control objectives of over-speed protection and improved start-up performance. The models were validated by the results. It was established that the two-stage centrifugal governor concept can be implemented on any wind turbine, provided the blades and tower are strong enough to handle the thrust forces associated with negative pitch control. It was recommended that an active pitch control system be developed that uses positive pitching for the over-speed protection, which will eliminate the large thrust forces. Keywords: pitch control, wind turbine, centrifugal governor, over-speed protection, cut-in wind speed, blade element-momentum theory, rotor, generator, stall, feathering.
Thesis (M.Ing. (Mechanical Engineering))--North-West University, Potchefstroom Campus, 2009.

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Zhang, Cheng. „A contribution to the nonlinear control of floating wind turbines“. Thesis, Ecole centrale de Nantes, 2021. http://www.theses.fr/2021ECDN0009.

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Les éoliennes flottantes permettent d’utiliser l’abondante ressource en vent présente au large des côtes, et sont considérées comme une source prometteuse d’énergie renouvelable. Cependant, en raison de dynamiques supplémentaires introduites par la plateforme flottante (notamment, le tangage), le contrôle d’une éolienne flottante doit être pensée afin de stabiliser le système tout en optimisant la production d’énergie. Ce travail est consacré à la commande non linéaire d’éoliennes flottantes dans la région III, la classe de lois de commande proposée nécessitant une connaissance réduite en terme de modélisation du système. Les objectifs de la commande sont de maintenir la puissance produite à sa valeur nominale, tout en li mitant le mouvement de tangage de la plateforme et les charges de fatigue sur la structure. Tout d’abord, une loi de commande adaptative basée sur le supertwisting est proposée, avec notamment une loi d’adaptation du gain très simple. Ensuite, en utilisant un contrôle collectif du pas des pales, ce nouvel algorithme de commande est appliqué sur un modèle d’éolienne flottante non linéaire et comparé à d’autres commandes adaptatives par modes glissants d’ordre 2. Dans un second temps, une machine synchrone à aimants permanents est supposée être installée dans l’éolienne flottante. L’utilisation du pas des pales (approche collective) et du couple du générateur permet d’atteindre les objectifs, à partir de lois de commande basées sur une approche adaptative par mode de glissement d’ordre 2. Une troisième partie est consacrée à l’étude d’une commande individuelle du pas des pales combinée à une commande collective. Il est montré qu’un tel algorithme limite la charge de fatigue des pales. Enfin, des lois de commande sont appliquées et comparées sur un système expérimental d’éolienne flottante placé dans un bassin à houle. Les performances des lois de commande basées sur les modes glissants sont évaluées par rapport à des approches de commande linéaire telles qu’un PI à gain variable, et une commande linéaire quadratique
Floating wind turbines allow the use of the abundant wind resource in ocean area and are considered as a promising solution of renewable energy. However, due to the additional dynamics (especially the platform pitch motion) introduced by the floating platform, the control of a floating wind turbine must take such pitch motion into consideration to stabilize the system meanwhile optimizing the power output. This work is dedicated to the nonlinear control of floating wind turbines in region III, this class of controllers requiring reduced knowledge of system modeling and parameter. The control objectives are to maintain the power output at its rated value, to reduce the platform pitch motion and to limit the fatigue load. Firstly, a simplified adaptive super-twisting is proposed. Then, by using collective blade pitch control, this algorithm and other adaptive high order sliding model algorithms are applied on a nonlinear floating wind turbine model. Secondly, a permanent magnet synchronous generator is supposed to be installed in the floating wind turbine. Both collective blade pitch control and generator torque control based on adaptive high-order sliding mode control are used to achieve the control objectives. Thirdly, individual blade pitch control combined with collective blade pitch control is employed. Such algorithm further reduces the fatigue load of blades. Finally, the proposed simplified adaptive super-twisting algorithm is validated on an experimental floating wind turbine set-up (with a spar-buoy platform) in a wave tank, and the control performances are evaluated versus linear control approaches such as gain-scheduled PI and linear–quadratic regulators

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Chen, Chien-I., und 陳建亦. „Development of Passive Wind Blade Pitch Control Mechanism“. Thesis, 2015. http://ndltd.ncl.edu.tw/handle/ece8p7.

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碩士
國立交通大學
機械工程系所
104
In this thesis, a passive wind blade pitch control mechanism is designed to increase the power generation of horizontal-axis wind turbines. This mechanism is able to adjust the pitch angles of wind blades before rotor speed attains the rated rotor speed and the turbine activates the safety braking system. In the passive wind blade pitch control mechanism, the root of the wind blade is housed in the circular rail of a ball bearing which is connected to two linear guide rails. The centrifugal force generated by the rotating blade is able to make the blade move on the linear guide rails in the axial direction. A cylindrical rod passing through the wind blade root acts as a guiding roller which rests on a pair of linear guide rails with different heights. With the help of the height difference, the guiding roller is able to make the blade root tilt an angle which can thus change the pitch angle of the wind blade. To meet the restriction of the wind power safety braking system, the pitch control mechanism is designed to achieve a pitch angle of 10 degree when the rotor speed reaches 110RPM. A set of compression springs of high stiffness is used to stabilize the movement of the blade in the mechanism during operation. Moreover, the compression springs are also used to prevent the pitch angle of the blade from occurring when the turbine is operated at low wind speed and make the blade rotate from the maximum pitch angle back to it’s the original position when the wind speed decreases below the rated value. Finally, the pitch control mechanism was fabricated for experimental investigation. The material testing system (MTS) has been used to test the motion of the mechanism and the test results have validated the suitability of the design.

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Hsu, Chih-Kai, und 許智凱. „Failure analysis of wind blade with passive pitch control mechanism“. Thesis, 2016. http://ndltd.ncl.edu.tw/handle/06351080882526469157.

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碩士
國立交通大學
機械工程系所
105
To enhance the efficiency of power generation and the safety of wind blades, a technique for designing a passive pitch angle control mechanism for a small blade was developed. This technique will make the wind load on the blade with pitch control capability different from that of the blade without. The purpose of this paper is to evaluate the safety of the wind blade with pitch control capability. First of all, the test results of a composite wind blade subjected to stroke-control testing are used to validate the finite element model of the blade. We construct the relationship between the force and the tip displacement and study the failure modes such as buckling and material failure of the blade. The finite element analysis program ANSYS is used to analyze the linear and nonlinear deformations of the blade. It has been shown that the nonlinear finite element method can produce more accurate results than the linear one when compared to the experimental results. Secondly, the pitch control mechanism is designed to achieve a pitch angel of 9.2 degree when the rotor speed reaches 200rpm. To understand the differences of wind forces on the blade with and without pitch control, strains on the skin of the rotating blade with/without pitch control capability are measured using a wireless transmission system for wind loads identification. In the case with pitch control mechanism, it has been shown the theoretical and experimental strains are different. A method is proposed to correct the wind load via the minimization of the sum of the squares of the differences of the theoretical and experimental strains. As for the case with 0 degree pitch angle, the experimental and theoretical results are similar. Next, the failure indices based on the Tsai-Wu criterion of the blade with pitch angles of 0 degree and 9.2 degree at wind speed of 8m/s are determined through the finite element analysis of the blade. It has been found that the failure index of the blade with 9.2 degree pitch angle is much lower than that of the case with zero pitch angle. The results show that at high wind speed, pitch control can enhance the safety of the blade and the pitch control mechanism does not fail. On the other hand, with the consideration of only one failure mode, it has been found that the first-ply failure of the blade with 0 degree pitch angle occurs at 23m/s. Finally, the main conclusions of this study are as follows. A method of correcting the force of blade is proposed for the case with pitch angle. Through the experiment and analysis, it has been demonstrated that the change of pitch angle can not only improve the power generation efficiency but also effectively reduce the failure index of the blade. In the case of zero degree pitch angle, the blade element theory can be used to evaluate the blade force.

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Su, Sin-Jhang, und 蘇信彰. „Application of Variable Blade Pitch Control on Improving the Performance of Vertical Axis Wind Turbine“. Thesis, 2012. http://ndltd.ncl.edu.tw/handle/986qz5.

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碩士
國立虎尾科技大學
航空與電子科技研究所
100
In viewing that the Vertical Axis Wind Turbines (VAWT) have the advantages over the Horizontal Axis Wind Turbine (HAWT) in insensitive to changing wind directions, low noise and easy installation for buildings in urban and suburban areas, they are being favorably considered for current and future green living environment. On the other hand, the VAWTs are suffered from the inherent problems of no self-start, lower efficiency compared to HAWT, and structural vibration. These problems enlighten that more research efforts are needed, in order to improve the performance of the current commercial VAWT products. This study is intended to improve the performance a VAWT by controlling the pitch angles of the turbine blades while rotating. A single blade wind turbine simulation is performed firstly to investigate the unsteady aerodynamic characteristics and the relation between the tangent force corresponded to rotating angle. The NACA 0015 airfoil is chosen as the section of the rotor blade with chord length 9cm and the radius of the wind turbine is 45cm. The wind speed and tip speed ratio are 7m/s and 2.5. Several fixed and variable pitch angle models are applied to investigate the unsteady flow field of the wind turbine by the methods of computation fluid dynamics. Results show that these blade pitch control models reduced effectively the negative torque regime as well as increase the tangent force of the turbine blade about 8.18% comparing with the without pitch control model. A three blades model is proceeded to study the aerodynamic characteristics of the vertical axis wind turbine. The effects of turbine performance are carried out with varying design parameters including thickness, chord length and camber. Results show that, the average torque coefficient is increased at lower tip speed ratio for the blades of proper thickness. The camber airfoils have the potential to self-start; however, the average torque coefficient shows a reduction in peak efficiencies. The longer the chord length of the blade, the average torque coefficient is reduced. However the average torque is increased. And the point of maximum average torque occurs at lower tip speed ratio. For the pitch control consideration, the models of pitch control are related to tip speed ratio. An appropriate pitch control model can effectively decrease the range of negative torque and the vibration of the wind turbine. The average torque coefficient as well as the energy capture efficiency can be improved. Therefore, the efficiency of the wind turbines in power generation will be enhanced. The efficiency can be raised 243.16% with fixed pitch control. And the efficiency can be enhanced to 486.06% with variable pitch control.

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Αντωνιάδης, Ηλίας. „Μελέτη συμπεριφοράς συστήματος ανεμογεννητριών μεταβλητών στροφών με φορτίο επαγωγική μηχανή και σύνδεση με το δίκτυο“. Thesis, 2011. http://hdl.handle.net/10889/4899.

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Στο πρώτο κεφάλαιο αναφέρονται χαρακτηριστικά της αιολικής ενέργειας. Μελετάται η ισχύς του ανέμου όπου βλέπουμε στοιχεία όπως τον τρόπο που σχηματίζονται οι άνεμοι, και περιγράφονται τα στοιχεία τη ανεμογεννήτριας και τα χαρακτηριστικά της αιολικής απόδοσης. Παρουσιάζονται τέλος, συνοπτικά, μερικά εισαγωγικά στοιχεία για τις κατανεμημένες παραγωγές, για τις κατανεμημένες πηγές ενέργειας και τον τρόπο που διανέμεται η παραγωγή της ενέργειας. Στο δεύτερο κεφάλαιο της διπλωματικής εργασίας γίνεται περιγραφή των φορτίων που υπάρχουν στα ηλεκτρικά κινητήρια συστήματα. Μελετάμε τη δομή αυτών και τα κατηγοριοποιούμε με κριτήριο τη ροπή τους. Στο τρίτο κεφάλαιο μελετάμε το τριφασικό βραχυκύκλωμα και τον τριφασικό διακόπτη. Αναφέρουμε τις παραμέτρους που παίζουν ρόλο στο βραχυκύκλωμα, τον τρόπο που συμπεριφέρεται μία μηχανή σε αυτό και τις συνιστώσες συνεχούς μεταβαλλόμενου ρεύματος. Στο τέταρτο κεφάλαιο περιγράφουμε τον τριφασικό μετασχηματιστή. Μελετάμε τις συνθήκες σύνδεσης αυτών και τον τρόπο που συνδέονται. Στο πέμπτο κεφάλαιο μελετάμε τις ανεμογεννήτριες μεταβλητής ταχύτητας, τον έλεγχο που γίνεται στον ανεμοκινητήρα για την ισχύ , τα κατάλληλα ηλεκτρονικά που χρησιμοποιούμε στις ανεμογεννήτριες, τους μετατροπείς συχνότητας και τα είδη γεννητριών. Αναφέρονται οι συνδεσμολογίες τους και ο τρόπος που ελέγχουμε τάσεις, ενεργό και άεργο ισχύ μέσω συστημάτων αυτομάτου ελέγχου. Στο έκτο κεφάλαιο γίνεται ανάλυση του αιολικού συστήματος μεταβλητών στροφών , όπου βλέπουμε τον μετασχηματισμό Park για τη μετατροπή συστήματος αξόνων, αναλύουμε το μοντέλο της μηχανής σε άλλο πλαίσιο αναφοράς (d – q) και εφαρμόζουμε διανυσματικό έλεγχο. Στο έβδομο κεφάλαιο σχεδιάζουμε το σύστημα που μελετάμε με το πρόγραμμα MATLAB / Simulink, Γίνεται μία αναφορά στους ελέγχους που μελετήθηκαν στο πέμπτο κεφάλαιο, χρησιμοποιώντας τους για την εξομοίωση. Αναλύουμε τον τρόπο που αρχικοποιούμε το σύστημά μας και εξομοιώνουμε το σύστημα με τις ανεμογεννήτριες παραθέτοντας τις απαραίτητες κυματομορφές.
The first chapter indicates characteristics of wind energy. Studied the wind power, where we see how winds are formed, and we describe the elements of wind and the characteristics of wind performance. Presented finally, briefly, a few introductory information on distributed generation for distributed energy sources. In the second chapter, there is a description of the electric motor systems loads. We study their structure and categorize them according to their torque. In the third chapter we study the three-phase fault and three phase switch. We report the parameters that play a role in short and how it behaves a machine on it. The fourth chapter describes the three-phase transformer. We study the association of these conditions and it is connected. In the fifth chapter we study the variable wind speed control, in Wind Turbines, the power, electronics that we use, frequency inverters and types of generators. We specify the connections and the way we control voltages, active and reactive power through control systems. The sixth chapter is an analysis of the variable wind speed system, where we see Park transformation to convert the axis system, we analyze the model of the machine in another frame of reference (d - q) and apply vector control. In the seventh chapter we design the system with the program MATLAB / Simulink, simulating the system. We analyze the way that we do the initialization of our system in order to simulate in several wind speeds, giving the necessary waveforms.

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Bücher zum Thema "Blade pitch control"

Lio, Wai Hou. Blade-Pitch Control for Wind Turbine Load Reductions. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75532-8.

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Blade Pitch Control Unit. Salt Publishing, 2005.

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Lio, Wai Hou (Alan). Blade-Pitch Control for Wind Turbine Load Reductions. Springer, 2019.

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Lio, Wai Hou (Alan). Blade-Pitch Control for Wind Turbine Load Reductions. Springer, 2018.

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Center, Ames Research, Hrsg. Kinematics and constraints associated with swashplate blade pitch control. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 1993.

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Sharif-Razi, Ali-Reza. Discrete-time blade pitch control for wind turbine torque regulation with digitally simulated random turbulence excitation. 1986.

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Sharif-Razi, Ali-Reza. Discrete-time blade pitch control for wind turbine torque regulation with digitally simulated random turbulence excitation. 1986.

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Buchteile zum Thema "Blade pitch control"

Lio, Wai Hou. „Background of Wind Turbine Blade-Pitch Load Reduction Control“. In Springer Theses, 11–49. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75532-8_2.

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Guerrant, Daniel, und Dale Lawrence. „Heliogyro Attitude Control Moment Authority via Blade Pitch Maneuvers“. In Advances in Solar Sailing, 667–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-34907-2_41.

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Chaaban, Rannam, Daniel Ginsberg und Claus-Peter Fritzen. „Structural Load Analysis of Floating Wind Turbines Under Blade Pitch System Faults“. In Advances in Industrial Control, 301–34. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-08413-8_11.

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Chen, Chin-Fan, Chi-Jo Wang, Alireza Maheri und Terrence Macquart. „Wind Turbine Blade Load Alleviation Performance Employing Individual Pitch Control“. In Lecture Notes in Electrical Engineering, 215–24. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-17314-6_28.

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Ramakrishna, V., P. Bangaru Babu und Ch Suryanarayana. „Non-Cavitating Noise Control of a Marine Propeller by Optimizing Number and Pitch of Blades“. In Recent Developments in Acoustics, 207–17. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5776-7_19.

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„Individual blade pitch control design of wind turbine based on load optimization model“. In Power and Energy, 271–76. CRC Press, 2015. http://dx.doi.org/10.1201/b18409-48.

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Guha, Dipayan, Provas Kumar Roy und Subrata Banerjee. „Dynamic and Stability Analysis of Wind-Diesel-Generator System With Intelligent Computation Algorithm“. In Handbook of Research on Smart Power System Operation and Control, 56–95. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-8030-0.ch003.

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In this chapter, the dynamic performance of a wind-diesel-generator system has been studied against wind and load perturbations. The wind perturbation is modeled by simulating base, ramp, gust, and random wind. An optimized cascade tilt-integral-derivative (CC-TID) controller is provided to the test system for producing desired control signal to regulate the blade pitch angle of wind turbine. To confirm the efficacy of CC-TID controller, the output results are compared to that of PI- and PID-controller. The optimum gains of the proposed controllers are explored employing Levy-embedded grey wolf optimization, whale optimization algorithm, drone squadron optimization, and search group algorithm. To show the effectiveness, the output results are compared to the results of genetic algorithm and particle swarm optimization tuned controllers. A thyristor control series compensator (TCSC) is provided to WDG model for increasing the damping of system oscillations. Analysis of the presented results confirm the supremacy of CC-TID-TCSC controller over other controllers provided in this chapter.

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Park, Sungsu, und Yoonsu Nam. „Two LQRI Based Blade Pitch Controls for Wind Turbines“. In Wind Turbine Technology, 199–226. Apple Academic Press, 2014. http://dx.doi.org/10.1201/b16587-13.

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Elyaalaoui, Kamal, Moussa Labbadi, Khalid Chigane, Mohammed Ouassaid und Mohamed Cherkaoui. „Operation and Startup of Three-Phase Grid-Connected PWM Inverter for an Experimental Test Bench With DSPACE Real-Time Implementation of PQ Control“. In Advances in Environmental Engineering and Green Technologies, 207–32. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-7447-8.ch008.

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The main objective of this chapter is the experimental validation of active and reactive power control at the connection point for a three-phase grid connected inverter. It gives an overview on the adopted vector control strategy, regulation of the angle of orientation of the blades (pitch control), synchronization grid side converter to the power network using phase closed loop (PLL). Once the experimental test bench is described, the authors devote a first part to the design of the block circuit diagram of the experimental platform and the control strategy implemented in the DSPace DS1104, and they suggest some steps to associate the inverter to the electrical network. Subsequently, they discuss the experimental results validating the proposed power control. The purpose of this experimental results is the DSPACE real-time implementation of PQ control using three-phase inverter and development of a startup algorithm of the experimental test bench.

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Konferenzberichte zum Thema "Blade pitch control"

Laks, Jason, Lucy Pao, Alan Wright, Neil Kelley und Bonnie Jonkman. „Blade Pitch Control with Preview Wind Measurements“. In 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-251.

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Paulos, James J., und Mark Yim. „Scalability of Cyclic Control without Blade Pitch Actuators“. In 2018 AIAA Atmospheric Flight Mechanics Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2018. http://dx.doi.org/10.2514/6.2018-0532.

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MacPhee, David, und Asfaw Beyene. „A flexible turbine blade for passive blade pitch control in wind turbines“. In 2011 IEEE Power Engineering and Automation Conference (PEAM). IEEE, 2011. http://dx.doi.org/10.1109/peam.2011.6134834.

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Wang, Na, Alan D. Wright und Kathryn E. Johnson. „Independent blade pitch controller design for a three-bladed turbine using disturbance accommodating control“. In 2016 American Control Conference (ACC). IEEE, 2016. http://dx.doi.org/10.1109/acc.2016.7525261.

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Stol, Karl, Wenxin Zhao und Alan Wright. „Individual Blade Pitch Control for the Controls Advanced Research Turbine (CART)“. In 44th AIAA Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2006. http://dx.doi.org/10.2514/6.2006-1367.

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Wang, Na, und Alan Wright. „Disturbance Accommodating Control based Independent Blade Pitch Control Design on CART2“. In 34th Wind Energy Symposium. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2016. http://dx.doi.org/10.2514/6.2016-1736.

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Liang, Yingbin, Jiandong Li und Jingjia Meng. „Blade vibration monitoring for a straight-bladed vertical axis wind turbine with pitch control“. In 2016 IEEE International Conference on Mechatronics and Automation. IEEE, 2016. http://dx.doi.org/10.1109/icma.2016.7558622.

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Paulos, James, und Mark Yim. „Cyclic Blade Pitch Control for Small UAV Without a Swashplate“. In AIAA Atmospheric Flight Mechanics Conference. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2017. http://dx.doi.org/10.2514/6.2017-1186.

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Thapa Magar, Kaman S., Mark J. Balas und Susan A. Frost. „Direct Adaptive Individual Blade Pitch Control for Large Wind Turbines“. In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-64817.

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In this paper a theory of Adaptive Disturbance Rejection Control is used to design an individual blade pitch controller for a utility scale wind turbine. The goal of the Adaptive Disturbance Rejection Control is to regulate the blade pitch angle individually to reduce the asymmetrical loading in blade due to vertical wind shear and also to reject the unnecessary disturbance introduced by the wind turbulence. The applicability of the theory is illustrated by implementing the controller in the National Renewable Energy Laboratory (NREL)s 5 MW wind turbine model and simulating it in MATLAB/Simulink.

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Zhang, Lixun, Yingbin Liang, Erxiao Li, Song Zhang und Jian Guo. „Vertical Axis Wind Turbine with Individual Active Blade Pitch Control“. In 2012 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE, 2012. http://dx.doi.org/10.1109/appeec.2012.6307108.

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Berichte der Organisationen zum Thema "Blade pitch control"

Dunne, F., E. Simley und L. Y. Pao. LIDAR Wind Speed Measurement Analysis and Feed-Forward Blade Pitch Control for Load Mitigation in Wind Turbines: January 2010--January 2011. Office of Scientific and Technical Information (OSTI), Oktober 2011. http://dx.doi.org/10.2172/1028529.

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