In an era of escalating energy demands and environmental challenges, mastering the complexities of renewable power systems is essential. This open access book delivers a cutting-edge exploration of innovative modeling and control techniques tailored for the unique characteristics of renewable power systems. Designed for engineers, researchers, and sustainability advocates, this book addresses critical issues such as low inertia and high variability, offering a roadmap to ensure safe, stable, and efficient operation. This comprehensive guide introduces the fully actuated system approach, a groundbreaking method that redefines how we tackle the nonlinear dynamics inherent in renewable power systems. By presenting experimentally validated solutions on hardware microgrids, the book bridges the gap between theory and practice, making it an indispensable resource for professionals aiming to enhance system reliability and control efficiency. Key topics include predictive control for DC and AC systems, learning-based optimization, and resilience strategies against cyber threats, with advanced applications like blockchain integration for secure operations. Readers will gain actionable insights into modern control strategies, rigorous modeling techniques, and emerging technologies shaping the future of renewable power systems. Whether you’re developing advanced control technologies or navigating the challenges of modern power systems, this book equips you with the knowledge and tools to lead in the renewable energy revolution.