Summary
This document is a case study that presents a comparison of ETAP Load Flow results against a published example from IEEE Std. 399-1997. It outlines the methodology used for the comparison, which includes the Newton Raphson Method, Adaptive Newton Raphson Method, and Fast-Decoupled methods applied to a forty-four bus system. The system comprises lines, cables, transformers, generators, and a utility connection, with considerations for line impedance and admittance. The results indicate that the differences in bus voltage magnitudes and angles, as well as power flows, are minimal, with discrepancies of less than 0.001% for all bus voltages and 0.34% for all power flows across the three load flow methods. The document includes detailed tables that illustrate the comparison results, providing explicit numerical data for reference. The case study serves to validate the accuracy of ETAP's load flow calculations against established standards.
