Nowadays, electric power quality (PQ) is an important concern in power supply industry due to widespread growth of digital economy and its dependence on sensitive equipments. Among various PQ attributes, voltage unbalance and harmonics distortion are probably the most degenerative conditions, due to their steady state nature. This book deals with harmonic pattern and performance of nonlinear loads in presence of voltage unbalance, through detailed logical investigations. Moreover, a thorough and systematic research review on the power system harmonics about its brief history, definitions,...