Report - J. Usman, M.W. Mustafa, G. Aliyu and A. M. Abdilahi · W W i STABi sT sT sT sT sT sT U K (1 )(1) (1 )(1 ) 1 2 4 1 31 (3) Where Ui is the PSS output signal at the ith machine, TW is

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