Impact of wind shear and tower shadow on the small signal stability of power systems incorporating wind turbines

Author(s): Ayodele T. R.a , Soile. A b, Munda J. L.c
a c Department of Electrical Engineering, Tshwane University of Technology, Pretoria, South Africa
b Department of Electrical and Electronic Engineering, University of Ibadan, Nigeria
International Journal of Smart Grid and Clean Energy, vol. 9, no. 1, January 2020: pp. 52-60
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.9.1.52-60

Abstract: This paper investigates the influence of 3p oscillations caused by wind shear and tower shadow on the power output of wind turbines and small signal stability of power systems incorporating wind turbines. First, the time-domain inputs of factors that affect 3p oscillations are modelled and its effect on power system small signal stability are determined via modal analysis. The whole system is modelled using power system toolbox in Matlab environment. Some of the key results reveal that 3p oscillations could result into fluctuating electric power fed to the grid, however, it may not necessarily result into small signal instability of the grid.

Keywords: Wind shear, tower shadow, small signal stability, wind turbine
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