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Fundamental Study of Oscillations in the Nigerian Power System

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posted on 02.08.2021, 03:57 by Nnaemeka Sunday UGWUANYINnaemeka Sunday UGWUANYI, Uma Uzubi Uma, Arthur Obiora Ekwue
The power systems in developing countries are usually stressed and operated near their stability limits. Consequently, accurate sources of oscillations and their controls can present a challenge. This paper reports a comprehensive study of the oscillations in the Nigerian 48-bus power system. The dominant modes, sensitive locations for faults, and the most responsible generators were identified by modal analysis. Uniquely, the potential for nonlinear modal interaction of these modes was carefully investigated. The low-frequency modes identified are 1 Hz, 1.14 Hz, and 1.37 Hz, and they are associated mainly with the generators at Kainji, Afam, and Delta power stations. The results indicate the existence of inter-area phenomena and nonlinear modal interactions among these modes. Also, the analysis revealed that the generator at the Kainji power station is most affected by the nonlinear interactions.

History

Email Address of Submitting Author

nnaemeka.ugwuanyi@univ-lille.fr

ORCID of Submitting Author

0000-0002-8578-8962

Submitting Author's Institution

University of Lille, F-59000 Lille, France

Submitting Author's Country

Nigeria