In the Second Edition, the utility of the book is enhanced by addition of some useful information and by thoroughly revising the contents in the books. It is hoped that the present edition will be welcomed and found to be quite useful by Electrical Engineering teaching faculyt as students. Salient Features ? All the chapters of the first edition are revised ? More information has been added to chapter on ?Introduction to Advanced Topics? ? Effect of Shunt Compensators, Controllable VAR Generation, Switching Converter type VAR generators are added ? The topic on ?Voltage Stability? is extended with some mathematical treatment and methods of preventing voltage collapse are mentioned ? In ?State Estimation chapter,? Least Squares Estimation procedure is elaborated