This book has evolved over three years with the development of new techniques and perspectives within Professor Ribeiro's Probabilistic Aspects of Harmonics Task Force of the IEEE Power Engineering Society. Key features: * Exhaustive reference on the analysis of time-varying waveform distortions in power systems , detailing many different approaches * Contains case studies and basic application examples, tables, and graphs to enable better understanding of the methods presented* Written by a range of professionals, varying from university lecturers to practising power engineers, and edited by a well-known professor in power issues...