Phasor and Temporal Diagrams in Electrical Power-System Fault Analysis

This Demonstration uses phasor and temporal diagrams to show the effect of symmetric and asymmetric faults in a three-phase system.

A temporal diagram shows the signals in cosine form, in which it is difficult to analyze the effect of a fault in an electrical system. In such cases, the phasor diagram helps the analysis. A phasor diagram represents the cosine wave frequencies as a vector.

The symmetric decomposition of phases A, B, and C shows the effects caused in symmetrically equivalent circuits (in positive, negative, and zero sequences).