Energy Router and Energy Internet
An energy router is an intelligent power electronic device that enables multi-directional energy flow and management within the Energy Internet, integrating renewable energy, storage, and loads efficiently.Energy Internet OverviewThe Energy Internet is a next-generation energy system that parallels the Internet in its structure and functionality. It allows energy to be shared, transmitted, and managed in a distributed and flexible manner, similar to how information flows online. Unlike traditional power systems with centralized generation and one-way energy flow, the Energy Internet supports bi-directional energy exchange, where users can both consume and supply energy, often from renewable sources like solar, wind, hydro, and electric vehicles . It integrates power electronics, information technology, and communication systems to optimize energy distribution, storage, and consumption.Role of Energy RoutersEnergy routers are the core devices of the Energy Internet. They combine power electronic conversion technology with information and communication technology to manage energy flow intelligently. Their main functions include:Power conversion and routing: Adjusting voltage levels, converting power forms, and isolating circuits to ensure safe and efficient energy transfer.Multi-directional energy flow: Allowing energy to move between distributed generation, storage systems, and loads.Information management: Handling device identification, system monitoring, anomaly detection, and communication with higher-level control systems .Coordination and control: Integrating with the upper system to manage energy supply, storage, and load access dynamically.Architectures and TypesEnergy routers can be classified based on their technology and grid access:Solid-State Transformer-based Energy Router (SST-ER): Suitable for medium- and high-voltage networks, providing voltage conversion, electrical isolation, and energy transfer.Multi-Port Converter-based Energy Router (MPC-ER): Supports multiple energy ports for flexible energy routing.Power Line Communication-based Energy Router (PLC-ER): Integrates communication over power lines for control and monitoring . The architecture typically consists of two layers:Electrical physical layer: The hardware for power conversion and routing.Information layer: Communication and control units that manage energy flow and interact with external systems .ApplicationsEnergy routers enable the integration of distributed generation, energy storage, and smart loads, supporting:Smart grids and microgridsElectric vehicle energy networksRenewable energy coordinationMulti-energy systems in smart cities, industries, and buildingsVirtual power plants and peer-to-peer energy trading By combining energy management with information processing, energy routers are essential for realizing the vision of a flexible, resilient, and efficient Energy Internet.