This book has investigated distributed cooperative intelligence in microgrid control system, precisely from the perspective of communication constraints. The utilization of advanced ICTs transforms DERs into intelligent “energy agents” forming a multi-agent system. While this cyber-enhanced, distributed control paradigm offers superior flexibility, scalability, and reliability over conventional centralized structures, its performance is inherently tied to the quality of the sparse communication network. The communication constraints have been central challenges that must be explicitly addressed to realize the full potential of a cooperative microgrid.