Development of a torque calibration procedure under rotation for nacelle test benches

Weidinger, Paula; Foyer, Gisa; Kock, Stefan; Gnauert, Jonas; Kumme, Rolf

doi:10.1088/1742-6596/1037/5/052030

Cited by 11 publications

(14 citation statements)

References 1 publication

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“…Using this easily applicable synchronization signal, the temporal shift between the two data sets was corrected. A more detailed description can be found in Weidinger et al (2018a).…”

Section: Data Synchronizationmentioning

confidence: 99%

“…To determine the zero signal S zero,rot , the signal was averaged over six full rotations (Eq. 3) with a prior settling time of t settling = 20 s to minimize control effects on the signal (Weidinger et al, 2018a). The zero signal was then used to tare the measurement signal in the following load cycle in post-processing; an active hard taring of the torque signals via an offset correction must be avoided during or after the calibration measurements since it would make the calibration invalid.…”

Section: Zero Signal Determinationmentioning

confidence: 99%

“…To rectify the omission of torque losses along the drive train and enable a traceable torque measurement under rotation directly at the WTTB's rotor hub flange, a 5 MN m torque transducer was acquired and characterized to allow it to be used as a torque transfer standard (TTS). The calibration procedure developed, which is described in Weidinger et al (2018a), was successfully performed on the WTTB of the Center for Wind Power Drives (CWD) at RWTH Aachen.…”

Section: Introductionmentioning

confidence: 99%

“…5 MN m TTS, including its data acquisition system (DAQ) and telemetry system, mounted at the rotor hub flange of the wind turbine under test on the WTTB of the Center for Wind Power Drives at RWTH Aachen (edited fromWeidinger et al, 2018a).…”

mentioning

confidence: 99%

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Calibration of torque measurement under constant rotation in a wind turbine test bench

Weidinger

Foyer

Kock

et al. 2019

J. Sens. Sens. Syst.

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Abstract. To determine the efficiency of multi-MW wind turbines, the torque measurement in wind turbine test benches has to be performed with an accuracy better than 0.2 %. To this end, the torque measurement has to be traced to national standards in the MN m range. This can be done by using a novel torque transfer standard in combination with a newly developed torque calibration procedure under constant rotation, which are both presented and discussed in this paper. The calibration procedure was performed on a 4 MW wind turbine test bench and the evaluation of the calibration result, including a measurement uncertainty, is explained in detail.

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“…Using this easily applicable synchronization signal, the temporal shift between the two data sets was corrected. A more detailed description can be found in Weidinger et al (2018a).…”

Section: Data Synchronizationmentioning

confidence: 99%

Section: Zero Signal Determinationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Calibration of torque measurement under constant rotation in a wind turbine test bench

Weidinger

Foyer

Kock

et al. 2019

J. Sens. Sens. Syst.

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show abstract

“…Until adequate calibration capacity becomes available, the torque measurement can only be partially calibrated. Measurement behaviour beyond that has to be extrapolated . Using this concept, the PTB has developed a 5‐MN

\cdot

m reference torque transducer (also known as "torque transfer standard") .…”

Section: Introductionmentioning

confidence: 99%

Proposals for a practical calibration method for mechanical torque measurement on the wind turbine drive train under test on a test bench

et al. 2020

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The mechanical torque input into the wind turbine drive train is a very useful measurement for tests performed on a test bench. To ensure the accuracy and the reliability, an accurate calibration of the torque measurement must be carried out and repeated within a certain period of time. However, owing to the high torque level and large structure size, such a calibration is both expensive and time consuming. To overcome this challenge, a new calibration method is proposed here. The method is based on the electrical power measurement, where a high level of accuracy is much easier to achieve. With the help of a special test process, a relationship between the torque‐measuring signal and the electrical power can be established. The process comprises two tests with the drive train running in different operating modes. The calibration is possible by carrying out the same test process on several different torque levels. Detailed uncertainty analysis of the method is presented, whereby the uncertainty can be calculated by means of matrix operation and also numerically. As a demonstration, the implementation of the method on a test bench drive train that contains two 5‐MW motors in tandem with the motors operating in a back‐to‐back configuration is also presented. Finally, some variations on the method and possible ways of achieving better accuracy are discussed.

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Direktmessung der Eingangslasten für einen auf einem Gondelprüfstand getesteten Windenergieanlagen-Antriebsstrang

Zhang

Pieper

Heller

2023

Forsch Ingenieurwes

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Modern wind turbines have some of the highest levels of torque and non-torque loads of all industrial sectors. These high loads present a great challenge for the design of wind turbines. On a nacelle test bench, the wind turbine drivetrain can be tested and validated against the design. It is therefore important to measure the correct level of each load and all its dynamic behaviors during the test. The best way to achieve this is to measure the loads directly in front of the drivetrain. This paper presents a method of direct load measurement on the shaft adapter which connects the drivetrain to the test bench. The technical solution and some important details about the instrumentation on the adapter are also presented. Methods of signal nulling as well as signal conversion from raw signals to the loads are compared as well. The measurements obtained are then compared with the applied loads from the test bench which show good agreement. As a special case, the torque measurement is validated and calibrated up to 5 MN m by means of a state-of-the-art torque transducer.

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Development of a torque calibration procedure under rotation for nacelle test benches

Cited by 11 publications

References 1 publication

Calibration of torque measurement under constant rotation in a wind turbine test bench

Calibration of torque measurement under constant rotation in a wind turbine test bench

Proposals for a practical calibration method for mechanical torque measurement on the wind turbine drive train under test on a test bench

Direktmessung der Eingangslasten für einen auf einem Gondelprüfstand getesteten Windenergieanlagen-Antriebsstrang

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