Energy Efficiency of Modern Power and Energy Systems introduces students and researchers to a broad range of power system management challenges, technologies, and solutions. This book examines the critical intersection of energy efficiency, power quality, and renewable energy integration. It primarily emphasizes applications, with each chapter outlining the problem’s fundamental structure to provide a basic understanding of the approaches discussed. Providing meticulously researched literature reviews for guiding deeper reading, this book leads readers from contextual understanding to specific case studies and solutions for sustainable power systems.