Asymmetrical fault classifier for a parallel transmission line using chromatic processing

In this presentation, a new concept of fault classification for asymmetrical faults is presented based upon chromatic maps of dominant phase shift and relative magnitude parameters. A novel approach for asymmetrical fault type classification on a parallel transmission line is described. The method is based on applying a chromatic monitoring methodology on the negative and zero-sequence components of the three-phase currents of either the sender or receiver end of a transmission line. Different asymmetrical fault scenarios at different locations, with various fault resistances are simulated using MATLAB software and its associated Simulink and Simpowersystem toolboxes. The simulated outputs are transformed chromatically into effective magnitude and dominant phase-shift parameters.