Author

College of Engineering Sulaimaniya University Iraq

Abstract

This is one of a series of papers interested mainly in the overall transient behaviour of integrated power systems. With a target of introducing the whole system in a synchronous machine-wise frame of reference: the subject paper is devoted for derivation of an expression for the long line as a machine-terminal constraint. Five versions for long line representation are proposed in an operational impedance matrix form. These can be left for further investigation for selection of the optimum, although the author recommends the fifth one.Modification of line parameters due to inclusion of other distributed and lumped parameter series or shunt elements are discussed. Besides, available methods in literature for calculations of voltage and current vectors at any point along the line are given.

Main Subjects