Case study: Flicker emission and 3P power oscillations on fixed-speed wind turbines

Lazkano, A.; Redondo, K.; Saiz, P.; Gutiérrez, J.J.; Azcarate, I.; Leturiondo, L.A.; Barros, J.

doi:10.1109/ichqp.2012.6381241

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…In an off-grid hybrid system which consists of battery storage and diesel generators as backup, the harmonics generated from the tower shadow effect can be propagated to them and eventually reducing their lifetime. It is acknowledged that flicker presents one of the most complex testing procedure compared to other power quality disturbances [9]. Besides, it is costly and challenging to study only the tower shadow effect in the field due to the difficulty of isolating it from other non-ideal effects (for instance the wind shear and turbulence effect).…”

Section: Modeling and Characterization Of Downwind Tower Shadow Effecmentioning

confidence: 99%

Modeling and Characterization of Downwind Tower Shadow Effects Using a Wind Turbine Emulator

Gan

Shek

Mueller

2017

IEEE Trans. Ind. Electron.

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This paper presents the modeling and characterization of the tower shadow effects using a wind turbine emulator in a laboratory environment. In particular, the downwind wind turbines are considered here as their tower shadow effects are more significant compared to the upwind counterpart. Simulation and experimental results have shown that the wind speed deficit due to this non-ideal effect is significant. In addition, the tower shadow effects occur typically two to three times per revolution, depending on the number of blades. The modeling of the tower shadow profiles for tubular and four-leg tower configurations are presented. Typically, these towers are used in small wind turbine applications. The tower shadow profiles are emulated experimentally using a wind turbine emulator with its characteristics being explained. The limitations of emulating the tower shadow effects using a wind turbine emulator are demonstrated through the frequency response test performed in this work. In this research, the wind turbine emulator is connected to an isolated grid which is formed by three single-phase inverters. Finally, the paper concludes with a sensitivity analysis of the power oscillations for different widths and magnitudes of the tower shadow profile.

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Section: Modeling and Characterization Of Downwind Tower Shadow Effecmentioning

confidence: 99%

Modeling and Characterization of Downwind Tower Shadow Effects Using a Wind Turbine Emulator

Gan

Shek

Mueller

2017

IEEE Trans. Ind. Electron.

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“…Power oscillations are due to switching operations (cut-in, cut-out and switch between generators), power control strategy and, mainly, environmental features (wind speed changes, wind shear and tower shadow) [2]- [4].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Fictitious Grid on Flicker Assessment of Grid Connected Wind Turbine

Redondo¹,

Lazkano²,

Saiz³

et al. 2024

RE&PQJ

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Abstract. This work studies the influence of the signal processing method on the flicker measurement of grid connected wind turbine in continuous operation according to the procedure detailed in the IEC 61400-21 standard. Two different methods for solving the fictitious grid are analyzed: Zero Crossing Detection and Short Time Fourier Transform. The deviations in the flicker measurement results obtained by applying both methods to actual signals from a measurement campaign are discussed. And the results are compared taking into account the grid impedance angle and the wind condition.

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Instantaneous amplitude and phase signal modeling for harmonic removal in wind turbines

Zivanovic

Plaza

Iriarte

et al. 2023

Mechanical Systems and Signal Processing

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Case study: Flicker emission and 3P power oscillations on fixed-speed wind turbines

Cited by 3 publications

References 10 publications

Modeling and Characterization of Downwind Tower Shadow Effects Using a Wind Turbine Emulator

Modeling and Characterization of Downwind Tower Shadow Effects Using a Wind Turbine Emulator

Influence of the Fictitious Grid on Flicker Assessment of Grid Connected Wind Turbine

Instantaneous amplitude and phase signal modeling for harmonic removal in wind turbines

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