Textbook in PDF format The book explores contemporary scientific issues, challenges, and future objectives in power production and energy systems. It specifically focuses on electrical energy and covers a variety of topics, including energy technology and production research, energy security and optimization, electrical energy system stability, technical reliability, biofuels, and the bio-economy. Additionally, the book addresses the current environmental challenges posed by the extensive use of fossil fuels across various energy applications. It emphasizes the importance of designing and operating energy systems in a safe and sustainable manner. Due to its interdisciplinary approach, this volume will be beneficial for both instructional and research purposes in undergraduate and graduate courses. It is also relevant for industry professionals and practitioners. Furthermore, the book aims to assist independent students in their self-study efforts