3-PHASE TRANSIENT STABILITY FAULT ANALYSIS OF A SINGLE MACHINE CONNECTED TO AN INFINITE BUSBAR EMPLOYING MODIFIED HUMPAGE MODEL

Summary

Transient stability analysis has recently become a major issue in the operation of power system due to the
increasing stress on power system networks. Solving this problem requires evaluation of power system’s
ability to withstand disturbances while maintaining the quality of service. This paper provides a study of
power system stability with the aim of overcoming and preventing disturbances or perturbations in power
system networks. The stability of an interconnected power system network is its ability to return to stable
state after been subjected to some form of disturbances. In this regard, a 3-phase fault is inflicted on the
generator bus bar of the power system network. The fault was cleared in 0.2 seconds. The swing equation
and the 4th order Runge Kutta integration method were used to apply to the equation of the system which
caused a change in the machine rotor angle. The static var compensator was introduced to enhance the
stability of the system. The tendency of the rotor angle versus time curves was used to determine the stability
or instability of test case using MATLAB code. This work employed the modified Humpage Model of power
system in which a single machine connected to an infinite bus bar via the transmission network. The results
so obtained is effective in planning or operation of power system because in all stability studies, the aim is to
determine the machine rotor angle being disturbed returns to constant speed operation for maximum power
transfer.

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