On the Multi-Body Modeling and Validation of a Full Scale Wind Turbine Nacelle Test Bench

2018 ◽  
Author(s):  
Meghashyam Panyam ◽  
Amin Bibo ◽  
Samuel Roach
Keyword(s):  
Wind Turbine ◽  
Test Bench ◽  
Low Voltage ◽  
Coupled System ◽  
Field Testing ◽  
Full Scale ◽  
Test Rig ◽  
Extreme Loads ◽  
Multi Body ◽  
The Impact

Ground testing of full-scale wind turbine nacelles has emerged as a highly favorable alternative to field testing of prototypes for design validation. Currently, there are several wind turbine nacelle test facilities with capabilities to perform repeated and accelerated testing of integrated turbine components under loads that the machine would experience during its nominal lifetime. To perform accurate and efficient testing, it is of significant interest to understand the interaction between coupled test rig/dynamometer and nacelle components, particularly when applying extreme loads. This paper presents a multi-body simulation model that is aimed at understanding the responses of a coupled test rig and nacelle system during specific tests. The validity of the model is demonstrated by comparing quasi-static and dynamic simulation responses of key components with experimental data obtained on an actual 7.5 MW test rig. A case study is conducted to analyze a transient grid-loss event; a Low Voltage Ride Through (LVRT) test on the dynamometer and drivetrain components. It is shown that the model provides an efficient way to predict responses of the coupled system during transient/dynamic tests before actual implementation. Recommendations for mitigating the impact of such tests on the test bench drive components are provided. Additionally, observations of differences between transient events in the field and ground based testing are made.

Numerical Towing Model for LNG Carrier Approach in Exposed Environment Calibrated With Full-Scale Measurements and Operability Criterion

2021 ◽  
Author(s):  
Erwan Auburtin ◽  
Quentin Delivré ◽  
Jason McConochie ◽  
Jim Brown ◽  
Yuriy Drobyshevski
Keyword(s):  
Numerical Model ◽  
Degrees Of Freedom ◽  
Line Tension ◽  
Full Scale ◽  
Model Parameters ◽  
Wave Loads ◽  
Simplified Approach ◽  
Large Matrix ◽  
Multi Body ◽  
The Impact

Abstract The Prelude Floating Liquefied Natural Gas (FLNG) platform is designed to offload liquefied natural and petroleum gas products to carrier vessels moored in a Side-by-Side (SBS) configuration. Prior to the mooring operation, the carrier vessel is escorted and held alongside the FLNG with the assistance of tugs connected to her bow and stern to ensure sufficient control over the vessel in this critical phase. In order to better understand the impact of environmental conditions, to determine the optimum length, strength, material and configuration of the towline stretcher, and to estimate the maximum operable environments, coupled multi-body simulations have been performed in time domain. The numerical model, which considered both the LNG carrier and the forward tug, was calibrated using full-scale measurements of tug motions and tow line tension recorded during a real approach and berthing manoeuvre at Prelude FLNG. The measured environment effects were generated numerically and the model parameters were adjusted to reproduce the recorded behavior as accurately as possible. Since actions of the tug master are difficult to model numerically and only the statistical environment parameters are known, a simplified approach has been adopted for modelling the tug propulsion and steering using a combination of static forces, stiffness and linear and quadratic damping for relevant horizontal degrees of freedom. The calibrated numerical model was first subjected to several sensitivity assessments of the modelling level (single- or multi-body, inclusion of second-order wave loads, inclusion of forward speed). Then sensitivity studies were performed to help address operational requirements related to the wave height and direction, and the stretcher length and strength. The conclusions have been taken into consideration for the selection of the tow line configurations for future operations. Finally, the calibrated coupled LNG carrier and tug model was used to derive Prelude-specific tug operability criteria that may be used for decision-making based on weather forecasts, prior to the SBS offloading operations. A large matrix of swell and wind driven waves was simulated over a range of wave heights, periods, directions and static towing forces to allow a criterion to be developed based on a stochastic extreme tow line tension. Such criterion considers relevant wave parameters while remaining simplified enough for easy use in operations. This paper describes the assumptions and process to numerically model the towing configuration and calibrate the different coefficients, discusses the results obtained for the various sensitivities, and explains the operability criteria. Important conclusions and lessons learnt are also shared.

The test bench for the assessment of the impact of wind turbine noise on human performance

2021 ◽  
Vol 263 (4) ◽  
pp. 2629-2633
Author(s):  
Dariusz Pleban ◽  
Grzegorz Szczepański ◽  
Jan Radosz ◽  
Łukasz Kapica
Keyword(s):  
Wind Turbine ◽  
Human Performance ◽  
Test Bench ◽  
Test Chamber ◽  
Wind Farms ◽  
Test System ◽  
Test Method ◽  
Pilot Studies ◽  
Wind Turbine Noise ◽  
The Impact

Among the factors related to the operation of wind farms, wind turbine noise has to be seen as a source of annoyance for both people living and working near wind farms. A method and a test bench to conduct noise annoyance tests of different types of wind turbine noise in laboratory conditions have been developed. The test bench is based on a multi-channel sound reproducing system using the DANTE network (in which digital acoustic signals are broadcast over Ethernet) and is compiled in the acoustic test chamber. The test bench consists of 19 speakers, including 17 Avantone MixCube studio monitors and 2 LS600 woofers. During the tests a study subject is assessed in terms of efficiency and performance using a computer-based ALS test from the Vienna Test System. The paper describes the test method, the test bench and the results of the pilot studies carried out to assess the impact of wind turbine noise on human performance.

Low Voltage Ride through (LVRT) Control of Double-Fed Wind-Driven Generator

2012 ◽  
Vol 499 ◽  
pp. 400-404
Author(s):  
Jian Hong Zheng ◽  
Jie Feng Li ◽  
Yu Zhi Gao
Keyword(s):  
Power System ◽  
Wind Turbine ◽  
Wind Power ◽  
Control Method ◽  
Low Voltage ◽  
Voltage Drop ◽  
Power Grid ◽  
Rapid Development ◽  
Low Voltage Ride Through ◽  
The Impact

With the rapid development of the wind power, it is no longer an isolated power system and gradually incorporated in the local power grid. However, as the increasing proportion of the installed wind power capacity in the power grid, the affection of the wind turbine to the region power system is getting heavier, which inevitably bring some new problems to the power system. The low voltage ride through (LVRT) is the direct embodiment of the power quality. In this paper, we fist analyze the impact of the voltage drop on the double-fed wind turbine. Then, a LVRT control method is proposed based on hardware realization. The detailed explanation of the proposed control method is given at last.

Characterizing the Influence of Abstraction in Full-Scale Wind Turbine Nacelle Testing

2016 ◽  
Author(s):  
Ryan Schkoda ◽  
Amin Bibo ◽  
Yi Guo ◽  
Scott Lambert ◽  
Robb Wallen
Keyword(s):  
Dynamic Response ◽  
Wind Turbine ◽  
Case Studies ◽  
Individual Component ◽  
Test Bench ◽  
Full Scale ◽  
Main Shaft ◽  
Main Bearing ◽  
Component Testing ◽  
Yaw Bearing

In recent years, there has been a growing interest in full-scale wind turbine nacelle testing to complement individual component testing. As a result, several wind turbine nacelle test benches have been built to perform such testing with the intent of loading the integrated components as they are in the field. However, when mounted on a test bench the nacelle is not on the top of a tower and does not have blades attached to it — this is a form of abstraction. This paper aims to quantify the influence of such an abstraction on the dynamic response of the nacelle through a series of simulation case studies. The responses of several nacelle components are studied including the main bearing, main shaft, gearbox supports, generator, and yaw bearing interface. Results are presented to highlight the differences in the dynamic response of the nacelle caused by the abstraction. Additionally, the authors provide recommendations for mitigating the effects of the abstraction.

Numerical Modeling of the Effects of Leading-Edge Erosion and Trailing-Edge Damage on Wind Turbine Loads and Performance

2020 ◽  
Author(s):  
Francesco Papi ◽  
Lorenzo Cappugi ◽  
Alessandro Bianchini ◽  
Sebastian Perez-Becker
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Prolonged Exposure ◽  
Turbine Blades ◽  
Leading Edge ◽  
Future Generation ◽  
Operating Conditions ◽  
Wind Speeds ◽  
Extreme Loads ◽  
The Impact

Abstract Wind turbines often operate in challenging environmental conditions. In hot and dusty climates, wind turbine blades are constantly exposed to abrasive particles that, according to many field reports, cause significant damages to the blade’s leading edge. On the other hand, in cold climates similar effects can be caused by prolonged exposure to hail and rain. Quantifying the effects of airfoil deterioration on modern multi-MW wind turbines is crucial to correctly schedule maintenance and to forecast the potential impact on productivity. Analyzing the impact of airfoil damage on fatigue and extreme loading is also important to improve the reliability and longevity of wind turbines. However, this is a topic that has not yet been extensively investigated. In this work, a blade erosion model is developed and calibrated using Computational Fluid Dynamics (CFD). The DTU 10MW Reference Wind Turbine (RWT) is selected as the case study for the analysis, as it is representative of the typical size of the future generation wind turbines. Lift and Drag polars are generated using the developed model and a CFD numerical set-up. Power and torque coefficients are compared in idealized conditions at two wind speeds, i.e. the rated speed and one below it. Full aero-servo-elastic simulations of the turbine are conducted with the eroded polars using NREL’s BEM-based code OpenFAST. Sixty-six ten-minute simulations are performed for each stage of airfoil damage, reproducing operating conditions specified by the IEC 61400-1 power production DLC-group, including wind shear, yaw misalignment and turbulence. Performance data, fatigue and extreme loads are compared for the aeroelastic simulations, showing maximum decreases in CP of about 12% as well as reductions in fatigue and extreme loading.

Behavior Analysis of the DFIG Wind Turbine in Voltage Double-Dip

2013 ◽  
Vol 805-806 ◽  
pp. 382-386
Author(s):  
Yong Sun ◽  
Chen Chen ◽  
Rui Ming Wang ◽  
Shao Lin Li ◽  
Jin Ping Zhang
Keyword(s):  
Wind Turbine ◽  
Wind Power ◽  
Low Voltage ◽  
Initial Value ◽  
Low Voltage Ride Through ◽  
Voltage Dip ◽  
Voltage Dips ◽  
Safety And Reliability ◽  
Stator Flux ◽  
The Impact

At present, the research on wind turbine low voltage ride through (LVRT) behavior is one of hotspots in wind power industry. With increasing share of wind power in the grid, it is important to enhance the LVRT performance of wind turbines to guarantee the safety and reliability of the grid. The phenomenon of voltage double-dip is one of cases during the voltage dips. In this paper, the voltage double-dip phenomenon is described, and the stator flux attenuation of DFIG wind turbine in the voltage dip is analyzed. The results show that when the second voltage dip occurs, the initial value of the stator flux should be considered. Finally, by on-site testing results, the impact of voltage double-dip to the wind turbine is verified, if the initial value of the stator flux is not considered, and the interval of two voltage dips is different.

scholarly journals CertBench: conclusions from the comparison of certification results derived on system test benches and in the field

2021 ◽  
Author(s):  
Uwe Jassmann ◽  
Anica Frehn ◽  
Heiko Röttgers ◽  
Fritz Santjer ◽  
Christian Mehler ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Real Time ◽  
Test Bench ◽  
Impedance Control ◽  
Field Measurements ◽  
Quality Models ◽  
Measurement Results ◽  
The World ◽  
The Impact ◽  
Plant Behaviour

AbstractThis paper presents measurement results of the world wide first successful certification the electrical properties of a wind turbine, solely based upon measurements obtained at a system test bench with HiL-System and grid emulator. For all certification relevant tests the results are compared to field measurements. The impact of the real-time models in the HiL-System as well as the converter-based grid emulator are discussed in this paper. For full converter wind turbine, different requirements for the model depth could be determined depending on the tests. Nevertheless, higher-quality models that reflect the plant behaviour better are recommended to reduce uncertainties within the certification process. This paper also shows that especially for grid failure events grid emulators require real-time impedance control, in order to emulate grid failures properly. Based on these findings, recommendations for the requirements on test bench components are formulated in this paper, in order to contribute to new certification guidelines. Overall, we conclude that based on the experiences made at two different system test benches, the vast majority of certification measurements can be carried out without limitation at such system test benches.

Impact Test Method for Automobile Plastic Tank Research and Equipment Development

2013 ◽  
Vol 456 ◽  
pp. 345-348
Author(s):  
Ling Long Wang ◽  
Tian Qiang Du ◽  
Wei Liu
Keyword(s):  
Simple Structure ◽  
Impact Test ◽  
Test Bench ◽  
Impact Resistance ◽  
Test Method ◽  
Test Rig ◽  
Equipment Development ◽  
Temperature Impact ◽  
The Difference ◽  
The Impact

The automobile fuel tank is an important component of the car, and it played an important role in the safety. Its one of the parts of car must be test in china and another place such as Europe before this parts used in a new car. In this article, the difference of requirement of low-temperature impact resistance is compared in GB18296-2001 and 70/221/EEC or ECE R34, then discuss the simple structure of pendulum for impact test according to GB18296-2001 and find it is not suitable for the impact test which required in 70/221/EEC.After that, designed an impact test rig meeting the requirements of the standard of GB18296-2001 and regulations of 70/221/EEC.The impact test bench is easy to operate, efficiency and safety.

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