With the generalized use of personal computers, microelectronic-based instrumentation and other susceptible devices, the subject of power quality and its link to the vulnerability of high-tech facilities is of concern. In the 21st century, instrumentation and control operations require high quality and ultra-reliable power in quantities and time frames not yet experienced. This book discusses the modern mitigation technologies employed in power quality and recent challenges. Topics include: how to deal with the characteristics of power quality studies; how common power disturbances can affect circuit and process design; the implications electromagnetic compatibility has on the equipment and installation design; how power electronic devices can improve the power quality of the distribution supply; and, advances in IT that support a better power quality. This book introduces advanced concepts to engineers and students and is a reference for facility electrical power engineers and maintenance technicians.