Power Systems Analysis is a compulsory course taken generally in the sixth semester by an undergraduate student of EEE / EE. This book has been designed to provide an in-depth study of the Power Systems Analysis and Stability course which will not only be useful for an undergraduate course but is also updated to be helpful for a related Post Graduate course. In the 4e, the text has been updated to include recent trends to help the reader develop a holistic perception of the power sector.