This comprehensive textbook on Power System Analysis, now in its Fourth Edition, includes performance and operation of the system during steady-state and transient state besides the analytical modelling, planning and control aspects. With an emphasis on fundamental topics, the text attempts to illustrate the basic concepts in the practical field through numerical problems. Computer simulations have been added at suitable places. The treatments presented are exhaustive and elaborate. This book is designed to cover the power system courses in the senior undergraduate curriculum of electrical engineering. In the new edition, the chapters and corresponding examples are arranged to align with the up-to-date syllabus in the power system across the Institutes and Universities in India. Care is taken so that the model curriculum of AICTE is followed in the reconfigured presentations. Suitable problems/illustrations are included to prepare the students for the competitive examinations.