可再生能源发电系统因其间歇性和波动性特点不适于独立的自发自用供电系统,需要与其他分布式电网或公共电网互联。在传统电网向能源互联网转型过程中将形成基于能量路由器(energy router,E-router)的智能型分布式能源网络。E-router作为该网络的核心,类比信息互联网的路由器,可以实现大量分布式电源接入低压电网后的能量管理和传输控制。该文在综合E-router应用类型和现有技术基础上,绘制了基于多能量路由器的3层树形架构智能型分布式能源网络,归纳分析了智能型分布式能源网络的典型特征,并从配电网层、微电网层和用户层详述了系统架构、接入能源、运行控制、通信调度和关键部件E-router的技术类型及实现方式。
Distributed power generation system cannot sufficiently guarantee the energy self-balance because of the intermittence and volatility of renewable energy sources. Therefore, interconnections with other distributed grids or the utility grid are necessary. During the transformation process of conventional grid to the energy internet, energy router(E-router)-based smart distributed energy network will be developed. As the core of the network, similar to an information router, E-router can realize the quantitative demand of energy and bi-directional power flow. The three-level tree architecture of hierarchical grid containing a cascaded regional E-router was drawn, considering existing application types and technologies of various E-routers. The typical features of the smart distributed energy network were summarized. The system structure, energy resource, operation control, communication-based management and the implementation of the key component E-router were described in details from the distribution level, microgrid level to the user level.