Identification of faulty load bus in a multi-bus power system

This paper deals with the identification of a faulty load bus, in a multi-bus power system, monitoring the inter-harmonic and sub-synchronous inter-harmonic operating point in P-δ plane, depending on passivity model based Gauss-Seidal iteration technique. In this analysis, real power, load angle and bus voltage have been calculated and the shifting of the various operating points in the inter-harmonic and sub-synchronous inter-harmonic P-δ curves have been assessed, for different feeders. The technique has been implemented in IEEE 30 bus system. Considerable change has been seen for fundamental and sub-synchronous inter-harmonic operating points in P-δ plane.