E.C. Obinabo  , C.S. Ikpeazu  , 
    The Construction of Rational Transfer Function Matrices for Inverse Multimachine Power Systems with Defined Input-Output Parameters,
    International Journal of Electrical and Power Engineering,
    Volume 2,Issue 6,
    2008,
    Pages 403-408,
    ISSN 1990-7958,
    ijepe.2008.403.408,
    (https://makhillpublications.co/view-article.php?doi=ijepe.2008.403.408)
    Abstract: A method for computing rational transfer function matrices for linear constant multimachine power systems defined by the relation <IMG SRC="http://www.medwelljournals.com/fulltext/IJEPE/Image12.gif"> directly from the Markov parameters is presented, where, <IMG SRC="http://www.medwelljournals.com/fulltext/IJEPE/Image13.gif">

represents the plant and <IMG SRC="http://www.medwelljournals.com/fulltext/IJEPE/Image14.gif"> the controller. Since, computational modeling provides a potentially powerful way of integrating structural properties of dynamic systems given in state space, an algorithm is described which enables transfer function matrices of constant multimachine power systems to be obtained by inversion. The result of this study confers several advantages over the other methods reported in the literature and can be applied directly to differential systems with input-output parameters without having to derive state space realization.
    Keywords: Transfer function matrices;linear constant multivariable systems;Markov parameters