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

Energies

Jin Tan¹  Weihao Hu²  Xiaoru Wang¹ 

[1] School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China; E-Mail:;Department of Energy Technology, Aalborg University, Pontoppidanstraede 101, Aalborg DK-9220, Denmark; E-Mails:

关键词: wind power integration;    interconnected power systems;    tie-line power oscillations;    forced power oscillation;    low frequency oscillations;    tower shadow and wind shear (TSWS);   

DOI  :  10.3390/en6126352

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.