This book provides systematical exhibitions of grabbing coordination opportunities for energy management in low-carbon power systems in terms of the transmission level, distribution level, and interactions with heterogeneous energy flows. Particularly, this book focuses on coordinated energy management for low-carbon power systems from a resource aggregation perspective which can be plug-and-play in practice with higher effectiveness. This book starts with introducing resource aggregation techniques with specific attention to the transmission level, distribution level, and interactions with heterogeneous energy flows. Moreover, this book incorporates renewable uncertainties into the previous resource aggregation techniques for comparison and further discussions. After that, this book introduces various applications in the operations and planning of low-carbon power systems. This book is intended for graduate students, researchers, and professionals who are interested in energy management of low-carbon power systems, and can also be offered as an encouragement to operators and engineers to employ this coordinated kind of energy management techniques.