This edited book proposes a collection of recently undertaken technical work on topics from various aspects of power engineering, energy systems as well as integrated smart technologies and related challenges. The scientific nature of the topics to be discussed in this book ranges from novel concepts to innovative implementations of smart technologies for promoting sustainable economic growth and development. Furthermore, this book substantially contributes to the relevant literature advancement and possibly serves as a platform for future research endeavors and publications. In addition, knowledge enrichment and expansion of power engineering and energy systems in the context of the Fourth Industrial Revolution, such as to be portrayed in this book, fundamentally appeal to researchers, power system engineers, energy specialists, data scientists, decision-makers as well as professionals involved in the various sectors that constitute the United Nations Sustainable Development Goals.