Wake effects in a linear wind farm

Beyer, Hans Georg; Pahlke, Thomas; Schmidt, Wolfgang M.; Waldl, Hans-Peter; Witt, Ubbo de

doi:10.1016/0167-6105(94)90065-5

Cited by 23 publications

(10 citation statements)

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“…Therefore, downstream turbines in a wind farm/array are more likely to suffer from multiple wake effects. These effects could result in up to 23% losses in the total wind farm power production (Barthelmie, et al, 2009;Dahlberg & Thor, 2009;Beyer et al, 1994). Moreover, enhanced turbulence (due to the formation of tip vortices) levels in subsequent rows of wind farms/arrays could impose dynamic (fatigue) loads on the downstream wind turbines (Sanderse, 2009).…”

Section: Problem Backgroundmentioning

confidence: 99%

“…Wake interference effects in large arrays of wind turbines are of great importance for the wind farm power generation. Power losses due to these effects will go up to 23% depending on the spacing and alignment of wind turbines (Adaramola & Krogstad, 2011;Barthelmie, et al, 2009;Dahlberg & Thor, 2009;Beyer et al, 1994). Hence, there have been extensive studies on how to arrange wind turbines -spacing and layout -in such an organized pattern so as to minimize the wake interference effects.…”

Section: C) Power Output Performance Measurementsmentioning

confidence: 99%

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An experimental investigation on wind turbine aeromechanics and wake interferences among multiple wind turbines

Ozbay

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CHAPTER 1. OVERVIEW 1.1 Problem Background 1 1.2 Problem Description 2 1.3 Literature Review 3 1.4 Wind Tunnel Testing and Limitations 10 1.5 Research Objectives 12 CHAPTER 2. AN EXPERIMENTAL INVESTIGATION ON THE PERFORMANCES OF WIND TURBINES SITED OVER NON-FLAT (2D-RIDGE) TERRAINS 2.1 Introduction 13 2.2 Experimental Setup and Procedure 15 2.3 Results and Discussions 19 2.4 Conclusion 34 CHAPTER 3. THE EFFECTS OF THE ONCOMING (AMBIENT) FLOW CONDITIONS ON THE WAKE CHARACTERISTICS AND DYNAMIC WIND LOADS ACTING ON A WIND TURBINE MODEL 3.1 Introduction 36 3.2 Experimental Setup and Procedure 38 3.3 Results and Discussions 45 3.4 Conclusion 63 iii CHAPTER 4. AN EXPERIMENTAL INVESTIGATION ON THE INTERFERENCE OF THE MULTIPLE WIND TURBINES WITH DIFFERENT LAYOUT PATTERNS IN ATMOSPHERIC BOUNDARY LAYER WINDS 4.1 Introduction 4.2 Experimental Setup and Procedure 4.3 Results and Discussions 72 4.4 Conclusion CHAPTER 5. AN EXPERIMENTAL STUDY ON THE YAW OPTIMIZATION Huseynov, who helped me stay sane through my graduate study. My parents, Akif and Sema Ozbay, and my sister, Asli Ozbay, have been a constant source of support-emotional, moral and of course financial-during my years as a graduate student, and this thesis would certainly not have existed without them. My wife, Hilal has been, always, my pillar, my joy and my guiding light, and I thank her.

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Section: Problem Backgroundmentioning

confidence: 99%

Section: C) Power Output Performance Measurementsmentioning

confidence: 99%

An experimental investigation on wind turbine aeromechanics and wake interferences among multiple wind turbines

Ozbay

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“…for such a task, including the analysis of an existing WF in China. An example of a WF consisting of a straight line of WTs for wake effect analysis is presented by Beyer et al . A case with different layouts and the search for the optimum one can be read in Husien et al .…”

Section: Introductionmentioning

confidence: 99%

Contributions to wind farm power estimation considering wind direction‐dependent wake effects

Feijóo

Villanueva

2016

Wind Energy

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This paper presents a contribution to wind farm ouput power estimation. The calculation for a single wind turbine involves the use of the power coefficient or, more directly, the power curve data sheet. Thus, if the wind speed value is given, a simple calculation or search in the data sheet will provide the generated power as a result. However, a wind farm generally comprises more than one wind turbine, which means the estimation of power generated by the wind farm as a function of the wind speed is a more complex process that depends on several factors, including the important issue of wind direction. While the concept of a wind turbine power curve for a single wind turbine is clear, it is more subject to discussion when applied to a whole wind farm. This paper provides a simplified method for the estimation of wind farm power, based on the use of an equivalent wake effect coefficient.

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“…However, depending on the assumptions made (e.g., discretization of the available WT positions within the wind farm site as a function of a predefined minimum allowed distance between WTs), the WFDO problem may fall into the class of problems known as combinatorial optimization problems. Let us suppose the simplest version of the WFDO problem (the Linear Wind Farm Design and Optimization (LWFDO) problem [27,156,157]) where WTs are located in a flat discretized straight line, having n discretized segments, which is parallel to unidirectional wind speed. Note that the domain discretization can be uniform or non-uniform as long as the minimum safety distances between WTs are respected.…”

Section: The Computational Complexity Of the Wfdo Problemmentioning

confidence: 99%

“…The WT mechanical/electrical power conversion and the WT Annual Energy Production (AEP) are the basic metrics used to evaluate the performance of wind farms. More than one third of the reviewed works used one of these metrics as an objective function [11][12][13][14][15]27,156,157,159,163,. Most of the non-linear behavior of the wind farm planning process comes from the quantification of both [29,214,215].…”

Section: Objective Functionsmentioning

confidence: 99%

A Review of Methodological Approaches for the Design and Optimization of Wind Farms

et al. 2014

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This article presents a review of the state of the art of the Wind Farm Design and Optimization (WFDO) problem. The WFDO problem refers to a set of advanced planning actions needed to extremize the performance of wind farms, which may be composed of a few individual Wind Turbines (WTs) up to thousands of WTs. The WFDO problem has been investigated in different scenarios, with substantial differences in main objectives, modelling assumptions, constraints, and numerical solution methods. The aim of this paper is: (1) to present an exhaustive survey of the literature covering the full span of the subject, an analysis of the state-of-the-art models describing the performance of wind farms as well as its extensions, and the numerical approaches used to solve the problem; (2) to provide an overview of the available knowledge and recent progress in the application of such strategies to real onshore and offshore wind farms; and (3) to propose a comprehensive agenda for future research. OPEN ACCESSEnergies 2014, 7 6931

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Wake effects in a linear wind farm

Cited by 23 publications

References 1 publication

An experimental investigation on wind turbine aeromechanics and wake interferences among multiple wind turbines

An experimental investigation on wind turbine aeromechanics and wake interferences among multiple wind turbines

Contributions to wind farm power estimation considering wind direction‐dependent wake effects

A Review of Methodological Approaches for the Design and Optimization of Wind Farms

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