Measurements of harmonic emission versus active power from wind turbines

Yang, Kai; Bollen, M.H.J.; Larsson, Ellinor; Wahlberg, Mats

doi:10.1016/j.epsr.2013.11.025

Cited by 43 publications

(23 citation statements)

References 11 publications

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“…When the operating point varies, different PDFs are observed in [15]. Furthermore, in [6], the individual harmonics or inter-harmonics can be either dependent on or independent of the active power production. These various cases of harmonic generation imply that the stochastic characteristics of harmonic generation are different from case to case.…”

Section: The Relationship Between the Wind Turbine Operating Point Anmentioning

confidence: 99%

“…In particular, increasing attention has been drawn to power quality concerns: harmonics and the output harmonic impedance of wind turbines (WTs) and the aggregating WPP are stochastic due to the inherent intermittency of the wind and wide control bandwidth of the power electronics interfaces [6,7]. These wideband stochastic harmonic emissions from modern converter-based WTs may adversely interact with the grid via vast underground or submarine cable systems, leading to many series and parallel resonance points that significantly change with the harmonic filters, feeder configuration and reactive power compensation devices associated with the number of WTs in operation [1,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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A Framework to Analyze the Stochastic Harmonics and Resonance of Wind Energy Grid Interconnection

et al. 2016

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This paper addresses a modeling and analysis methodology for investigating the stochastic harmonics and resonance concerns of wind power plants (WPPs). Wideband harmonics from modern wind turbines (WTs) are observed to be stochastic, associated with real power production, and they may adversely interact with the grid impedance and cause unexpected harmonic resonance, if not comprehensively addressed in the planning and commissioning of the WPPs. These issues should become more critical as wind penetration levels increase. We thus propose a planning study framework comprising the following functional steps: First, the best fitted probability density functions (PDFs) of the harmonic components of interest in the frequency domain are determined. In operations planning, maximum likelihood estimations (MLEs) followed by a chi-square test are used once field measurements or manufacturers' data are available. Second, harmonic currents from the WPP are represented by randomly-generating harmonic components based on their PDFs (frequency spectrum) and then synthesized for time domain simulations via inverse Fourier transform. Finally, we conduct a comprehensive assessment by including the impacts of feeder configurations, harmonic filters and the variability of parameters. We demonstrate the efficacy of the proposed study approach for a 100-MW offshore WPP consisting of 20 units of 5-MW full converter turbines, a realistic benchmark system adapted from a WPP under development in Korea and discuss lessons learned through this research.

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Section: The Relationship Between the Wind Turbine Operating Point Anmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Framework to Analyze the Stochastic Harmonics and Resonance of Wind Energy Grid Interconnection

et al. 2016

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“…Al incrementar la producción de potencia de un aerogenerador, el total de interarmonicos también aumenta. Los armónicos no dependen de la potencia activa de producción, mientras que los interarmonicos tienen una relación de dependencia con la potencia activa de producción (Yang et al, 2014), (Yeh & Huang, 2014).…”

Section: Transitoriosunclassified

Influencia de las ráfagas de viento en la calidad de la energía de los parques eólicos

2014

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(Recibido: 2014/04/30 - Aceptado: 2014/09/22)La matriz energética mundial está cambiando debido a que el consumo de energía en los últimos años se ha duplicado. En muchos países la instalación de centrales de energías renovables no convencionales se ha convertido en la solución a este crecimiento. La integración de este tipo de energías a la red eléctrica causa interés en el estudio de las propiedades eléctricas que afectan la producción de energía. Este documento es una revisión de los conceptos y fenómenos de calidad de energía y cómo estos se generan en parques eólicos. La eficiencia de los aerogeneradores se ve afectada por diversos factores, entre los cuales se destacan: las maniobras en subestaciones y los factores climáticos como las ráfagas de viento causantes de variaciones en la curva de potencia. El monitoreo constante en los sistemas eléctricos y el análisis de datos ofrece un alto potencial en la mejora de los procesos de producción y distribución de la energía.

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“…This assumption is demonstrated to be valid when the interharmonic source is an EAF which mainly produces modulation of the fundamental voltage in the frequency range from 0 to 20 Hz, that is to say modulations produced by interharmonics in the frequency range from 20 to 80 Hz. Recent studies have demonstrated that modern distributed energy resources, in particular wind turbines, are able to produce interharmonics in a wide range of frequency from DC to some kilohertz [15]. Moreover, in [16][17][18], it was demonstrated that interharmonic components produced by adjustable speed drives can cover all the frequency range from DC.…”

Section: Introductionmentioning

confidence: 99%

A new frequency approach for light flicker evaluation in electric power systems

Feola

Langella

Testa

2015

EURASIP J. Adv. Signal Process.

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In this paper, a new analytical estimator for light flicker in frequency domain, which is able to take into account also the frequency components neglected by the classical methods proposed in literature, is proposed. The analytical solutions proposed apply for any generic stationary signal affected by interharmonic distortion. The light flicker analytical estimator proposed is applied to numerous numerical case studies with the goal of showing i) the correctness and the improvements of the analytical approach proposed with respect to the other methods proposed in literature and ii) the accuracy of the results compared to those obtained by means of the classical International Electrotechnical Commission (IEC) flickermeter. The usefulness of the proposed analytical approach is that it can be included in signal processing tools for interharmonic penetration studies for the integration of renewable energy sources in future smart grids.

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Measurements of harmonic emission versus active power from wind turbines

Cited by 43 publications

References 11 publications

A Framework to Analyze the Stochastic Harmonics and Resonance of Wind Energy Grid Interconnection

A Framework to Analyze the Stochastic Harmonics and Resonance of Wind Energy Grid Interconnection

Influencia de las ráfagas de viento en la calidad de la energía de los parques eólicos

A new frequency approach for light flicker evaluation in electric power systems

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