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Testing and Measurement

The research group test and measurement deals with all measurements related to wind energy. A data acquisition system and a meteorological measurement tower with a total height of up to 120 m are available for standard power performance testing and load measurements according to IEC 61400-12/-13. In collaboration with the German wind energy Institute DEWI certification tests of the prototype M 5000 of the company AREVA Wind (5MW, 116 m rotor diameter) as well as of the prototype SDD110 of the company Schuler (2,7MW, 110 m rotor diameter) have been carried out.

Another area of work focuses on the detection of wind fields using the lidar technology (Light Detection and Ranging). This technology is becoming more and more important through the increased cost of masts and the demand for higher temporal and spatial resolution of the wind field. Lidar measurements have been carried out from the ground in flat and mountainous terrain as well as offshore (North Sea, Baltic Sea and Mediterranean Sea). The group is working on the development of a floating lidar buoy as well. For lidar applications from the nacelle of a wind turbine (WT), a scanner was specifically developed by the group.  The system allows scanning the incoming wind field or the wake of a wind turbine at discrete points.  The measured data is used for nacelle-based power performance testing and load estimation as well as for predictive control (see research group Control, Optimization and Monitoring). In cooperation with the Danish DTU further investigations of the wake of wind turbines have been performed. In Task 32 "LIDAR" of the International Energy Agency the group is working closely with the DTU and the American Research Centre NREL. There, the SWE contributes in the Subtask I "Calibration and classification of lidar devices" (lead by DTU) and the Subtask II "Procedures for site assessment" (lead by NREL). The Subtask III "Procedures for turbine assessment" is conducted by the SWE itself.

Team

Stefan Baehr
Oliver Bischoff
Francesca Calarco
Florian Haizmann
Martin Hofsäß
Christian Molter
David Schlipf
Maayen Wigger
Ines Würth (team leader)

 

Research Projects

MALIBU - Model-based approach for floating lidar based offshore wind potential measurements: Determination of the uncertainty

Content

Floating lidar buoys provide a flexible and, particularly, cost-effective approach for assessing the wind resources at offshore sites. However, since the buoy motions have an impact on the lidar measurements, it is supposed that a detailed recording and understanding of this impact is an essential pre-requisite for applying the technology at a fully commercial level, in order to utilize the full potential of lidar buoys. It is already recommended practice to monitor external influences – as e.g. relevant sea conditions or atmospheric measurement parameters – in parallel to a lidar-buoy measurement and relate these values to the measurement performance of the system.

The MALIBU project shall go a step further: it is planned to develop a simulation environment for floating lidar buoys and, in a second step, link this simulation model to an uncertainty assessment for floating lidar measurements. Following research and project scope shall be investigated:

  • Development of a simulation environment for floating lidar systems by coupling a reduced buoy model with a simulation environment for lidar measurements, which fulfills the necessary accuracies and is ready for fast simulations and data analysis
  • Validation of the simulation environment for different environmental conditions with measurement data of the „Fraunhofer IWES Wind-Lidar-Boje“ and measurement data of the research platform “FINO I”
  • Determination and forecasting of uncertainties related to wind ressource assessment with floating lidar systems for different site conditions
  • Analysis of optimization methods for different buoy configurations to reduce measurement uncertainty
  • Demonstration of the approach by assessing the effects of uncertainty on wind yield assessments and cost of energy.

Coordination

Universität Stuttgart, SWE

Partners

Fraunhofer IWES

Funding

BMWi_Office_Farbe_de_WBZ

Duration

July 2017 - June 2020

Contact

Dipl.-Ing. Oliver Bischoff

WINSENT (Wind Science & Engineering Test Site)

Realisierung und Charakterisierung einer süddeutschen Forschungsplattform für Windenergie im bergig-komplexen Gelände

 winsent_logoLogo_WindForS_mitText_EN_RGB_2015_300dpi

Content

Within the framework of the project a fully functional wind energy test site in complex mountainous terrain is constructed. The test site location has already been identified within the KonTest project (Fkz. 0325656 A-D). The test site offers both a real and a virtual environment as well as testing new technologies and control strategies. The open platform supports the use of wind energy in complex terrain through improved prediction of performance and turbine load as well as through yield increase and load reduction. Besides the Coordination the project includes: Construction and Operation, Microclimate and FoWEA.

Construction and Operation includes the specification, acquisition, commissioning and maintenance of the necessary measurement equipment as well as data collection and storage. It also comprises the acquisition and construction of the research turbine inclusive of license and the necessary modifications, including the hardware-in-the-loop test stand for operational and supervisory control.
The overall objective of Microclimate is to characterize the location. To this end, measurements are carried out at the test site location, initially without the impact of the research turbines. After two thirds of the project duration the research turbines are constructed and their influence on the microclimate is investigated. Wind conditions, acoustic and avifauna are investigated with four instrumented met masts, long-range lidar devices, UAV and other sensors. The findings and data are then fed into numerical calculation models which are thus extended, enhanced and coupled.
In FoWEA the geometric and structural turbine data are processed and a new open source turbine controller is designed, tested on the HIL and implemented in the research wind turbine. Consistent numerical models of the research turbines in various simulation environments are provided and validated by comparing them with data measured at the real turbines and used for quantification of design margins.

WindForS-Testfeld - Source 2Dmedia                     [Quelle: 2Dmedia]

SWE-contribution

Construction and Operation

  • Design and test of the sensors and the measuring system
  • Creating a database structure
  • Data collection, quality assurance and plausibility checks
  • Support for data management

Microclimate

  • Evaluation of statistical quantities of the simulations and comparison with the measurements
  • Investigation of the interaction of the research wind turbine (FWEA) with the varying meteorological boundary conditions
  • Measurements of the vertical velocity and turbulence profiles for the location characterization and validation of numerical simulations
  • Flow characterization by comparison of spatially recorded wind data
  • Performance curve comparison in different meteorological conditions
  • Acoustic characterization of the site at different stages of the project

FoWEA

  • Development and implementation of a Research Baseline Controller and conception of a supervisory control strategy in MATLAB-Simulink and compilation of both for the use within different simulation tools
  • Development of test procedures for future research controllers in a hardware-in-the-loop test bed in order to represent the real behavior of the FWEA in the laboratory
  • Development of consistent numerical simulation models of the FWEA throughout different aero-elastic simulation tools ranging from reduced to high-fidelity models
  • IEC conform load case simulations with realistic inflow conditions in flat and complex terrain and comparison between simulation models
  • Comparison of measurement data from the FWEA with simulation results and improvement of models

Coordination

Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW)

Partners

Funding

BMWi_Office_Farbe_de_WBZ

Duration

December 2016 – May 2020

Contact

Martin Hofsäß

 

ANWIND - Application-oriented research and measurement of windfields
for wind turbinesAnwind Logo PNG 500x192


Content

  1. Creating new knowledge about windfields and their characteristics
  2. Development of new measurement devices and testing of new measurement techniques for sensing the windfield in front of and at the wind turbine
  3. Analysing the influence of the wind field on the operation of the turbine through measurement campaigns on- and offshore
  4. Testing of new control strategies using the new knowledge about wind fields and the newly developed measurement devices

Coordination

University of Stuttgart, SWE

Partners

Senvion GmbH

Funding

Duration

Januar 2016 bis Dezember 2018

Contact

Florian Haizmann

 

TremAc

Objective criteria for vibration and sound emissions of onshore wind turbines

 

Content

  • Identification of the main parameters and thresholds for an objective assessment of turbine sound and vibration emissions taking into account turbine design, topography and distance from the place of immission.
  • Development of prognosis and simulation models for the emission and propagation of airborne sound (especially infrasound) and vibration (structure-borne sound) interacting with structures, initially for flat terrain and subsequently for complex mountainous terrain and different subsoil strengths.
  • Development of strategies for optimising wind turbines through adaptable constructive designs with a view to reducing sound and vibration emissions, this applies, for example, to the positioning of the drive train or of the tower and to shielding procedures.
  • Increasing acceptance and creation of a sound data base in terms of environmental health and environmental psychology in order to promote an objective discussion of potential health risks of wind turbines.

SWE-contribution

  • Noise measurements and identification of wind turbines.
  • High-fidelity wind turbine modelling for the prediction of structure-borne sound, for example due to drive-train excitation.
  • Model validation and influence of model fidelity.

Coordination

Karlsruhe Institute of Technology (KIT) , Institute of Soil Mechanics and Rock Mechanics (IBF)

Partners

Karlsruhe Institute of Technology (KIT) Universität Stuttgart Technische Universität München (TUM) Universität Bielefeld               Martin-Luther-Universität Halle-Wittenberg (MLU) MesH Engineering GmbH (MEG)

Funding

BMWi_Office_Farbe_de_WBZ

Duration

February 2016 – January 2019

Contact

Birger Luhmann

 

VORKAST : Optimisation of design and operational management for hybrid power plants and energy storage technologies by means of wind and PV power nowcasting


Content

Nowcasting of PV and wind power feed-in provides important parameters for the operation of hybrid power plants (HPP). In the frame of the proposed endeavour we aim to develop forecasts for these two parameters for forecast horizons of 0 to 60 minutes with high temporal resolution. These nowcasts, together with short range and medium PV and wind power predictions stemming from weather forecasts, as well as load predictions, serve as essential input parameters for the ZSW-developed P2IONEER model. The model allows us to compute an optimal mix of energy sources for a given HPP and operate it efficiently. After developing and testing the new forecast and operation procedures we will carry out a multi-month online test using real wind and PV power plants within a test region, jointly with power plant operators and regional utilities. A concluding workshop comprising all stakeholders is planned at the end of the project.

SWE-contribution

  • Nowcasting strategies using an ultra-long range lidar with a measurement distance up to 10km
  • Predicting the wind power in a time range up to 60 min considering the dynamic variability of the wind speed
  • Online testing of the developed nowcasting strategies on a large scale wind turbine

Partners

  • Centre for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW)
  • University of Stuttgart – Stuttgart Wind Energy (SWE)

Funding

 

Duration

September 2014 - February 2017

Contact

I.Wuerth

 

LUI: Ludwigsburg intermodal. Development of the train station in Ludwigsburg to an intermodal mobility hub as part and step to a "comfortable station"


Content

Within the development proposal „rebuilding station of Ludwigsburg to a comfortable station“ the Institute for Urban Development applied for the project „LUI Ludwigsburg intermodal“. The project „LUI“ is part of  „Schaufenster Elektromobilität“ [showcase electro mobility] and will be connected to “LivingLab BWe mobil” with other projects in the region.The Institute for Urban Development is responsible for structuring a set-up for car and pedelec sharing. Within the Project “LUI” an innovative business model for electro mobile car sharing is to be tested. Therefor the integration of car sharing in intermodal mobility chains and intermodal infrastructure (station, park and ride, charging management and parking management etc.) as well as the integration of the innovative car sharing in fleet management of municipalities / businesses and in the management of private commuter traffic will be tested.Besides potential locations for charging stations the expansion of renewable energies in the periphery of the station will be verified to guarantee a zero-carbon energy supply for alternative mobility concepts. A climate protection concept still to be designed will consider the installation of renewable energies.

Source (in german, shortened): institute for urban development

SWE-contribution

  • Measurement of the wind potential at the station in Ludwigsburg
  • Analysis of potential for energy production using wind power

Partners

  • University of Stuttgart – Institute of Urban Development (Städtebau-Institute (SI), project management)
  • University of Stuttgart – Stuttgart Wind Energy (SWE)

Funding

Contract research

Duration

November 2014 - February 2016 (SWE only)

Contact

M. Wigger

 

KonTest – Conception of a wind energy test site in mountainous - complex terrain


Content

The aim of the BMWi - funded joint research project is the conception of a Southern German wind energy test site in mountainous - complex terrain. This includes the basic concept as well as finding a suitable location in Baden - Württemberg or Bavaria. Following the “KonTest” project, a test site with two 600-900 kW research wind turbines shall be realized on the basis of this conception. The test site’s aim is the preparation, the testing and validation of new technologies in terms of materials, methods of construction, aerodynamics, load control, noise reduction, production engineering, operations management and measurement and monitoring of wind turbines. Further investigations are the storage and the integration of renewable electric energy in the grid. Subjects of landscape aesthetics and ecological monitoring are also considered in the future research on the planned test site.

SWE-contribution

  • Project management „KonTest“
  • Specification of concept catalogue and finding of a research wind turbine
  • Specification of concept catalogue of measurement equipment and site infrastructure
  • Wind measurements at potentional sites

Partners

  • Universität Stuttgart
    • Stuttgarter Lehrstuhl für Windenergie (SWE)
    • Institut für Aerodynamik und Gasdynamik (IAG)
    • Institut für Leichtbau Entwerfen und Konstruieren (ILEK)
  • Technische Universität München
    • Lehrstuhl für Statik (LST)
    • Fachgebiet für Landschaftsarchitektur Regionaler Freiräume (LAREG)
    • Lehrstuhl für Windenergie
  • Karlsruher Institut für Technologie
    • Institut für Meteorologie und Klimaforschung (IMK)
    • Institut für Bodenmechanik und Felsmechanik (IBF)
    • Stahl- und Leichtbau Versuchsanstalt für Stahl, Holz und Steine (VAKA)
  • Universität Tübingen
    • Lehrstuhl für Umweltphysik am Zentrum für Angewandte Geowissenschaften (ZAG)
    • Physische Geographie und Geoinformatik (Geoinf)
  • Zentrum für Sonnenenergie- und Wasserstoff- Forschung Baden Württemberg

Funding

Duration

November 2013 - October 2015

Contact

Dipl.-Ing. J. Anger

 

LIDAR II - Entwicklung gondelbasierter LiDAR-Technologien für die Messung des Leistungsverhaltens und die Regelung von Windenergieanlagen


Projektinhalt

  1. Entwicklung/Erprobung robustes gondelbasiertes LiDAR
  2. Erprobung LiDAR-Regelung
  3. Leistungscharakteristik und -monitoring bei inhomogener Einströmung

SWE-Beitrag

  • Stationäres Leistungs- und Ertragsverhalten mit gondelbasiertem LiDAR im Offshore Testfeld
  • Untersuchung des einströmenden Windfeldes
  • Prädiktive Regelung mit gondelbasierter LiDAR-Technologie zur Böenkompensation und Ertragsoptimierung

Projektpartner

  • Universität Stuttgart – Stiftungslehrstuhl Windenergie
  • ForWind – Universität Oldenburg
  • Deutsches Windenergie Institut GmbH (DEWI)
  • Fördergesellschaft Windenergie e.V. (FGW)
  • AREVA Wind GmbH

Finanzierung

Laufzeit

November 2010 - Oktober 2014

Kontakt

Dipl.-Ing. S. Raach

 

Lidar complex – Development of LIDAR technologies for detecting wind field structures in the optimization of the use of wind energy in the mountainous, complex terrain


Content

  1. Measurements in complex terrain
  2. Wind field investigation and modeling
  3. Transfer the results on wind turbine parameters

SWE-
contribution

  • Meteorological measurements according to IEC on a complex site
  • LIDAR measurements in the IEC compliant and complex terrain
  • Development of measurement strategies for LiDAR measurements in complex terrain
  • Simulation and analysis of a real wind turbine model in the IEC compliant site
  • Simulation and evaluation of generic wind turbine models in complex terrain
  • Creating and validating a wind field generator

Partners

  • University of Stuttgart: Stuttgart Chair of Wind Energy, Institute of Aircraft Design, Institute of Aerodynamics and Gasdynamics
  • University of Tübingen: Center for Applied Geoscience (ZAG)
  • Institute for Meteorology and Climate Research (IMK), Karlsruher Institute of Technology (KIT)
  • Kenersys GmbH
  • Fördergesellschaft Windenergie e.V. (FGW)

Funding

Duration

October 2012 - September 2015

Contact

Dipl.-Ing. M. Hofsäß

 

KIC Inno Energy – NEPTUNE


Content

The main objective of this project is to develop a floating platform and a buoy for meteorological and oceanographic measurements at sea. For the measurements of the wind field for this purpose, a lidar device will be used. Other objectives for this project include

  1. the development of methods to compensate for the effects of motion of such a floating platform on the measurement of the wind field
  2. the processing of the collected data for potential users in the field of wind energy
  3. the development of methods which allow a more accurate prediction of wind and wave condition, based on measurement data gathered with this buoy.

SWE-
contribution

  • Consulting services to the order of the Lidar system, calibration, certification and evaluation for use on a floating platform.
  • Cooperation and support of field campaigns of the buoy and the lidar system
  • Analysis and processing of the acquired data in these campaigns
  • Development of methods to compensate for the motion of the buoy measurements and lidar
  • Development of software solutions for the treatment of the data collected for applications in the field of wind energy.

Partners

SWE, IREC, GasNatural, UPC-RSLab, UPC-LIM, CIEMAT, SIMO 

Funding

KIC InnoEnergy

Duration

December 2011-October 2014

Contact

Dipl.-Ing. O. Bischoff

 

MaRINETMarinet


Content

MARINET is an EC-funded network of research centres and organisations that are working together to accelerate the development of marine renewable energy technologies - wave, tidal & offshore-wind - by offering periods of free-of-charge access to their world-class testing facilities and conducting joint activities in parallel to standardise testing, improve testing capabilities and enhance training and networking.

SWE-
contribution

  • Coordination of requests to the facilities of the University of Stuttgart (http://www.fp7-marinet.eu/USTUTT.html)
  • Participation in the work packages „2 Ocean Energy System Testing – Standardisation and best practice” and “Research to innovate and improve Infrastructures, technologies and techniques.”

Partners

http://www.fp7-marinet.eu/about_network_partners.html

Funding

EU

Duration

April  2011 – March 2015

Contact

Dipl.-Ing.  A. Rettenmeier

 

InnWInd


Content

The overall objectives of the INNWIND.EU project are the high performance innovative design of a beyond-state-of-the-art 10-20MW offshore wind turbine and hardware demonstrators of some of the critical components.

SWE-
contribution

  • WP1: Conceptual Design
    • External conditions (floating lidar buoy,
    • Advanced contols and integrated innovative concept
  • WP4 Offshore support structures
    • Innovation and methods for floating structures
    • Structural Implementation

Partners

http://www.innwind.eu/Participants.aspx

Funding

EU

Duration

April  2011 – March 2015

Contact

Dipl.-Ing. Frank Sandner

 

IEA Annex 32 – Wind Lidar for Wind Energy Deployment


Content

Further development of the lidar technology regarding

  1. Subtask I - Calibration and classification of lidar devices
  2. Subtask II - Procedures for site assessment: Wind potential determination in mountainous terrain and on floating platforms, turbulence measurement and extreme wind events
  3. Subtask III - Procedures for turbine assessment: Applications for the certification of wind turbines using ground-based and nacelle based lidars (power performance testing and load estimation)

SWE-
contribution

  • Lead of Subtask III „Procedures for wind turbine assessment“
  • Participation in the othersubtasks

Partners

worldwide

Funding

International Energy Agency (IEA)

Duration

Mai 2012 - Mai 2015

Contact

Dipl.-Ing.  A. Rettenmeier

 

 

Baltic I


Content

The project aims to optimize the economical operation of large offshore wind farms and the production in the interconnected system. Ultimately, the project will help to reduce the potential risks of offshore wind farms as part of the specific meteorological conditions of the Baltic Sea. The research focus is on the grid integration of wind farms involving performance predictions and novel strategies for monitoring the operational behavior of the individual wind turbines and the wind farm as a whole.

SWE-
contribution

  • Further development of Load Monitoring procedures
  • Long-range LiDAR wind measurements for power performance testing and wake effect in an offshore wind farm

Partners

  • University of Stuttgart: Stuttgart Chair of Wind Energy,
  • ForWind – Universität Oldenburg
  • EnBW Erneuerbare Energien GmbH
  • Deutsches Windenergie Institut GmbH (DEWI)

Funding

Duration

March 2011 -  May 2014

Contact

Dipl.-Ing. J. Anger