Model based fault detection analysis of transmission line switching and harmonics for resistive load

Abstract

In this work, firstly a simulation model has been developed for the characterization and harmonic analysis of the load voltage during the condition of the faults. For this, primary line, backup line and MOSFET have been considered in this model. The MOSFET is used in the model to transfer the control from primary to backup line automatically under the condition of the fault. Moreover, a hybrid approach, considering the RMS of the Fundamental component of voltage at each instant, has also been developed, for the detection of faults and for the estimation of the fault durations. It is shown that the proposed hybrid approach is proficient in the detection of fault and estimates the fault duration without producing any error. In addition to this the estimation of duration, time of occurrence and magnitude of harmonics are relatively compared with the event of voltage interruption.