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Energies 2013, 6(12), 6352-6372; doi:10.3390/en6126352
Article

Effect of Tower Shadow and Wind Shear in a Wind Farm on AC Tie-Line Power Oscillations of Interconnected Power Systems

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Received: 4 November 2013; in revised form: 27 November 2013 / Accepted: 28 November 2013 / Published: 4 December 2013
(This article belongs to the Special Issue Wind Turbines 2014)
Download PDF [1740 KB, uploaded 4 December 2013]
Abstract: This paper describes a frequency domain approach for evaluating the impact of tower shadow and wind shear effects (TSWS) on tie-line power oscillations. A simplified frequency domain model of an interconnected power system with a wind farm is developed. The transfer function, which relates the tie-line power variation to the mechanical power variation of a wind turbine, and the expression of the maximum magnitude of tie-line power oscillations are derived to identify the resonant condition and evaluate the potential risk. The effects of the parameters on the resonant magnitude of the tie-line power are also discussed. The frequency domain analysis reveals that TSWS can excite large tie-line power oscillations if the frequency of TSWS approaches the tie-line resonant frequency, especially in the case that the wind farm is integrated into a relatively small grid and the tie-line of the interconnected system is weak. Furthermore, the results of the theoretical analysis are validated through time domain simulations conducted in the two-area four-generator system and the Western Electric Coordinating Council 127 bus system.
Keywords: wind power integration; interconnected power systems; tie-line power oscillations; forced power oscillation; low frequency oscillations; tower shadow and wind shear (TSWS) wind power integration; interconnected power systems; tie-line power oscillations; forced power oscillation; low frequency oscillations; tower shadow and wind shear (TSWS)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Tan, J.; Hu, W.; Wang, X.; Chen, Z. Effect of Tower Shadow and Wind Shear in a Wind Farm on AC Tie-Line Power Oscillations of Interconnected Power Systems. Energies 2013, 6, 6352-6372.

AMA Style

Tan J, Hu W, Wang X, Chen Z. Effect of Tower Shadow and Wind Shear in a Wind Farm on AC Tie-Line Power Oscillations of Interconnected Power Systems. Energies. 2013; 6(12):6352-6372.

Chicago/Turabian Style

Tan, Jin; Hu, Weihao; Wang, Xiaoru; Chen, Zhe. 2013. "Effect of Tower Shadow and Wind Shear in a Wind Farm on AC Tie-Line Power Oscillations of Interconnected Power Systems." Energies 6, no. 12: 6352-6372.


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