The book "Electrical Power Systems Quality" by Roger C. Dugan, Mark F. McGranaghan, Surya Santoso, and H. Wayne Beaty, in its third edition, provides a comprehensive guide to power quality issues in electrical systems. The authors aim to address the growing concern over power quality, which has become increasingly important due to the sensitivity of modern load equipment and the increasing emphasis on power system efficiency. The book covers various aspects of power quality, including voltage sags and interruptions, transients, harmonics, and long-duration voltage variations. It also discusses the evaluation and mitigation of these issues, the role of distributed generation (DG) in power quality, wiring and grounding practices, and power quality monitoring techniques. The content is designed to be accessible to both utility engineers and industrial engineers, providing both practical guidance and technical details. The book includes detailed chapters on each type of power quality variation, standards, and case studies, making it a valuable resource for professionals in the field.The book "Electrical Power Systems Quality" by Roger C. Dugan, Mark F. McGranaghan, Surya Santoso, and H. Wayne Beaty, in its third edition, provides a comprehensive guide to power quality issues in electrical systems. The authors aim to address the growing concern over power quality, which has become increasingly important due to the sensitivity of modern load equipment and the increasing emphasis on power system efficiency. The book covers various aspects of power quality, including voltage sags and interruptions, transients, harmonics, and long-duration voltage variations. It also discusses the evaluation and mitigation of these issues, the role of distributed generation (DG) in power quality, wiring and grounding practices, and power quality monitoring techniques. The content is designed to be accessible to both utility engineers and industrial engineers, providing both practical guidance and technical details. The book includes detailed chapters on each type of power quality variation, standards, and case studies, making it a valuable resource for professionals in the field.