This book highlights the various challenges and complications related to the field of power quality. Power quality is a term used to widely cover the entire scope of interplay in electrical suppliers, the environment, the products and systems energized, and the users of those systems as well as products. Power Quality has been a significant issue ever since the conception of electricity, but only in the past two decades has it received its due attention. Researchers and scientists from across the globe have contributed valuable information in this extensive book. The aim of this updated book is to serve as a useful source of reference for readers including researchers, students and even scientists interested in acquiring knowledge regarding this field.