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Impact of Intermittent Wind Generation on Power System Small Signal Stability [chapter]

Libao Shi, Zheng Xu, Chen Wang, Liangzhong Yao, Yixin Ni
2011 From Turbine to Wind Farms - Technical Requirements and Spin-Off Products  
of the rotor; V w denotes the wind speed; and β is the blade pitch angle; V cut-in and V cut-offt are the cut-in and cut-off wind speed of wind turbine; V rated is the wind speed at which the mechanical  ...  ratio (v t /v w ), the ratio between blade tip speed, v t (m/s), and wind speed at hub height upstream of the rotor, v w (m/s); A wt = R 2 is the area covered by the wind turbine rotor, R is the radius  ...  Impact of Intermittent Wind Generation on Power System Small Signal Stability, From Turbine to Wind Farms -Technical Requirements and Spin-Off Products, Dr.  ... 
doi:10.5772/15281 fatcat:43ugaacqdzdk3bgxd56v4l5rie

Comparative Assessment of SVC and TCSC Controllers on the Small Signal Stability Margin of a Power System Incorporating Intermittent Wind Power Generation

T. R. Ayodele
2014 Journal of Wind Energy  
The result also reveals that allocation of power system stabilizer (PSS) using probabilistic method is more effective and robust compared to deterministic approach.  ...  Wind power is highly variable due to the stochastic behavior of wind speeds.  ...  Figure 13 : 13 3D plot of speed when PSS is allocated using (a) deterministic method and (b) probabilistic method.  ... 
doi:10.1155/2014/570234 fatcat:vgj4wjdgqbbohnundggqlujqku

Quantification and Analysis of Uncertainties in Parameters of Rotors Supported by Bearings

Caio C. O. Da Costa, Cesar Da Costa
2021 European Journal of Engineering and Technology Research  
This method is used to obtain means and standard deviations of the system responses, given the means and standard deviations of the inputs.  ...  The uneven distribution of mass on the structure of the rotors creates heavy spots, which must be eliminated to avoid generating excessive stress on the rotor bearings.  ...  Fig. 6 . 6 Histogram of critical speeds for 4000, 6000, and 8000 objects. Fig. 7 . 7 Campbell's graph for deterministic parameters of the rotor with an unbalance disc.  ... 
doi:10.24018/ejers.2021.6.2.2361 fatcat:owwzdgvypbaprlp5iayl6qx66u

Application of the lifting line vortex wake method to dynamic load case simulations

K. Boorsma, M. Hartvelt, L.M. Orsi
2016 Journal of Physics, Conference Series  
Results are presented for yawed flow, extreme transient shear, half wake and turbulent inflow conditions.  ...  Within the EU AVATAR project, the added benefit of using the vortex line method is researched by calculating aero-elastic response for a variety of IEC load cases.  ...  Acknowledgements Financial support for this work was given in part by the EU AVATAR project.  ... 
doi:10.1088/1742-6596/753/2/022030 fatcat:csxwmztvcndlhoarcc6dobpifa

Wind Turbines Control: Features and Trends

Ali Oudah, Izzeldin I.Mohd, A. Hameed
2014 Modern Applied Science  
We provide in this tutorial paper an overview brief of basic wind turbine energy control systems and an optimistic or reflective area in a recent industry developments and research in wind turbine control  ...  systems for more grid performance and frequency stability.  ...  objects, and the methods of deterministic analysis and design cannot yield accurate and good results.  ... 
doi:10.5539/mas.v8n6p272 fatcat:h4wqenjslzekdfjsdyvuvkdo5i

Digital Twins-Assisted Design of Next-Generation Advanced Controllers for Power Systems and Electronics: Wind Turbine as a Case Study

Meisam Jahanshahi Zeitouni, Ahmad Parvaresh, Saber Abrazeh, Saeid-Reza Mohseni, Meysam Gheisarnejad, Mohammad-Hassan Khooban
2020 Inventions  
internal coefficients of HIL controller are adjusted based on DDPG for the regulation of WT plant, and (ii) the difference between the rotor speed waveforms in HIL and SIL are reduced by DDPG to obtain  ...  To highlight the applicability of the suggested methodology, the regulation control of a horizontal variable speed wind turbine (WT) is considered for the design and assessment purposes.  ...  the instability of DDPG learning.  ... 
doi:10.3390/inventions5020019 fatcat:bvvvmoefrvdlfbxnbzrk34jode

Identifying Structural Parameters of an Idling Offshore Wind Turbine Using Operational Modal Analysis [chapter]

Paul L. C. van der Valk, Marco G. L. Ogno
2014 Dynamics of Civil Structures, Volume 4  
Initially, in order to evaluate the feasibility of this method for the identification of an OWT, it was applied to simulated data.  ...  This turbine (BB16) is a 3.6MW geared Horizontal-Axis Wind Turbine (HAWT) with a 107m rotor diameter.  ...  Evaluation of the identification results for the rotor stops data Comparison between morning and afternoon RS identifications The statistical values of the selected modal clusters are presented in the  ... 
doi:10.1007/978-3-319-04546-7_31 fatcat:5s636db3zfcplico34pix64cyi


2016 Journal of Engineering Science and Technology  
In this article, the performance of Latin Hypercube Sampling (LHS) technique is explored and compared with SRS in term of accuracy, robustness and speed for small signal stability application in a wind  ...  The reduced sample size required by LHS gives it computational speed advantage (about six times) over the conventional method.  ...  statistic were evaluated using equations ( 10 ) and ( 16 ) in a repeated MCS.  ... 
doaj:07e4272a6e834980a43142e0f8e581f1 fatcat:ftc63czszrcn3ot3lta7najlhq

Non-deterministic kinetic energy within the rotor wakes and boundary layers of low-speed axial fans: frequency-based decomposition of unforced unsteadiness and turbulence

J. M. Fernández Oro, K. M. Argüelles Diaz, E. Blanco Marigorta
2009 Journal of turbulence  
The present investigation shows that the presence of the unforced component is mainly related to instabilities of the rotor wakes and tip vortex structures, as well as wake-wake interactions.  ...  It is shown that typical values of unforced unsteadiness reach up to a 20% of the total unsteady energy, even for nominal conditions at midspan of the rotor passage.  ...  Acknowledgements This work was supported by the Research Project "Characterization of the Generation of Aerodynamic Noise due to the Interaction between the Rotor Blades and the Guide Vanes in Axial Flow  ... 
doi:10.1080/14685240902971097 fatcat:rsnpln2sjndo7pmw7rky23vuym

A 5MW direct-drive generator for floating spar-buoy wind turbine: Development and analysis of a fully coupled Mechanical model

Latha Sethuraman, Yihan Xing, Zhen Gao, Vengatesan Venugopal, Markus Mueller, Torgeir Moan
2014 Proceedings of the Institution of mechanical engineers. Part A, journal of power and energy  
A discussion on the development of the variable speed-variable pitch control system suitable for the directdrive system including modifications to avoid negative damping and blade-pitch instability are  ...  This work forms the first of a two-part investigation aimed at identifying the challenges and opportunities of implementing a direct-drive generator for a spar-buoy type floating wind turbine.  ...  In order to evaluate the performance and stability of the controller, time response simulations were carried out where the turbine was subjected to deterministic wind speeds as recommended by Larsen and  ... 
doi:10.1177/0957650914537262 fatcat:jvbmlnktkvao7bs23dq5ccubkq

Control and Estimation of a Variable Pitch Wind Turbine for Maximum Power Point Tracking [chapter]

Ranjan Vepa
2016 Wind Turbines - Design, Control and Applications  
In this chapter, the design of a nonlinear rotor-side controller is described for a variable pitch wind turbine based on nonlinear, H 2 optimal control theory.  ...  The algorithm uses a non-linear estimation technique and maximizes an estimate of the actual power transferred from the turbine to the generator.  ...  Author details Ranjan Vepa Address all correspondence to: School of Engineering and Material Science, Queen Mary University of London, London  ... 
doi:10.5772/62723 fatcat:kogmoslshfdhpfmuhb4p5zgsue

The effects of blade structural model fidelity on wind turbine load analysis and computation time

Ozan Gözcü, David R. Verelst
2020 Wind Energy Science  
Aero-servo-elastic analyses are required to determine the wind turbine loading for a wide range of load cases as specified in certification standards.  ...  The floating reference frame (FRF) formulation can be used to model the structural response of long and flexible wind turbine blades.  ...  The authors are grateful to Sergio González Horcas and Anders Melchior Hansen for their contribution to the HAWC2 solver.  ... 
doi:10.5194/wes-5-503-2020 fatcat:67ld3jptvrcxjgduhbhqyefecy

Grid Integration Challenges of Wind Energy: A Review

Shakir D. Ahmed, Fahad S. M. Al-Ismail, Md Shafiullah, Fahad A. Al-suliman, Ibrahim M. El-amin
2020 IEEE Access  
For more information, see  ...  wound rotor (type 2)) VOLUME 8, 2020 This work is licensed under a Creative Commons Attribution 4.0 License.  ...  ACKNOWLEDGMENT The authors would like to thank the Center of Research Excellence in Renewable Energy (CoRE-RE) and the Electrical Engineering Department at both King Fahd University of Petroleum & Minerals  ... 
doi:10.1109/access.2020.2964896 fatcat:cluy4udksvfklcsl253qee22au

Performance and Wake Characterization of a Model Hydrokinetic Turbine: The Reference Model 1 (RM1) Dual Rotor Tidal Energy Converter

Craig Hill, Vincent S. Neary, Michele Guala, Fotis Sotiropoulos
2020 Energies  
Performance was measured for a range of tip-speed ratios by varying rotor angular velocity.  ...  Peak power coefficients, CP= 0.48 (right rotor) and CP= 0.43 (left rotor), were observed at a tip speed ratio, λ= 5.1.  ...  The goals of the present study were to (a) evaluate dual-rotor power performance in an open-channel flow environment, (b) investigate wake flow recovery for dual-rotor axial-flow marine turbines, and (  ... 
doi:10.3390/en13195145 fatcat:nlywefnn7nbz3oqmyeyun4ctbi

Dynamic Analysis of Floating Wind Turbines During Pitch Actuator Fault, Grid Loss, and Shutdown

Erin E. Bachynski, Mahmoud Etemaddar, Marit I. Kvittem, Chenyu Luan, Torgeir Moan
2013 Energy Procedia  
Coupled non-linear aero-hydro-servo-elastic simulations of three types of floating wind turbines (spar, semi-submersible, and tension leg platform) are carried out for several fault cases over a range  ...  and aerodynamic braking), and 3) grid loss followed by shutdown.  ...  Thanks are extended to Zhiyu Jiang for his discussions and comments.  ... 
doi:10.1016/j.egypro.2013.07.174 fatcat:gnyioaqwxrdodlphuifvvn623u
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