Energy Internet Hierarchy Classification

The Energy Internet hierarchy is classified based on a multi-layered structure combining physical, cyber, and business layers, with hierarchical control mechanisms to manage distributed energy resources efficiently and reliably.Hierarchical Structure of the Energy InternetThe Energy Internet (EI) is organized into three primary layers:Physical Layer: This layer integrates multiple energy systems, including electricity, heating, cooling, gas, water, and transportation. It uses energy routers, energy hubs, multi-energy storage, and plug-and-play techniques to enable interconnection between energy suppliers and consumers, facilitating bidirectional energy flow and distributed generation management .Cyber Layer: The cyber layer applies Internet technologies to energy systems, enabling decentralized intelligence, cloud-edge control architectures, and advanced communication protocols. This layer ensures smart, open, and synergistic operation of the energy network, supporting real-time monitoring, prediction, and control of energy flows .Business Layer: This layer defines policies, market mechanisms, and business models for energy sharing, such as peer-to-peer (P2P) energy trading. It governs economic interactions and regulatory frameworks to optimize energy utilization and promote a sharing economy .Hierarchical Control and Classification BasisThe Energy Internet adopts a “regional coordination and hierarchical control” mechanism to ensure clean energy integration and reliable operation:Hierarchical Control: Energy resources are managed at multiple levels, from local energy LANs (e.g., home or building level) to urban and regional networks, up to global Energy Internet coordination. Each level has autonomy but is interconnected for optimal energy distribution .Intra-layer Partitioning: Within each hierarchical level, energy nodes (generation, storage, and loads) are grouped into subnets for efficient local control and optimization .Interregional Interconnection: Different regions are interconnected to balance supply and demand, allowing surplus energy to be shared and deficits to be compensated through storage or grid support .Autonomy and Equivalence: Nodes and subnets operate independently while maintaining coordination, reflecting the equivalence concept of the Energy Internet, where no single node dominates the network .Energy Flow Management: Energy balance is maintained through predictive control of distributed generation, storage devices, and grid interaction. Surplus energy is stored or fed back to the grid, while deficits trigger energy supply from storage or grid sources .Classification CriteriaThe hierarchy is classified based on:Functional Role: Generation, storage, load, and routing modules are categorized according to their role in energy production, consumption, and distribution .Geographical Scope: Levels range from local (home/building) to urban, regional, and global networks .Control Autonomy: Nodes and subnets are classified by their degree of autonomy and ability to perform local optimization while participating in higher-level coordination .Energy Type Integration: Classification considers the type of energy managed (electricity, heat, gas, etc.) and the ability to integrate multiple energy carriers . This hierarchical classification ensures efficient, reliable, and sustainable operation of the Energy Internet, enabling large-scale integration of renewable energy, bidirectional energy flow, and smart energy management across multiple scales.