Per Unit Analysis for Single & 3 Phase Systems

This course is an introduction to per unit system analysis in power systems. The author, an experienced electrical engineer, explains that power system analysis can be challenging due to factors such as three-phase nature, transformer ratios, transformer connections, and unbalanced conditions. However, the author presents solutions to these difficulties, including per phase analysis, per unit normalization, basic circuit theorems, and symmetrical components. By applying these techniques, the complexities introduced by transformers can be eliminated, resulting in a simplified single-phase circuit that can be analyzed with ease. The author concludes by showcasing a typical setup of a three-phase system and highlighting the benefits of using per unit analysis.