基于云雾边协同理念的“电网一张图”维护与自动更新策略研究

为了实现智能电网“源-网-荷-储”协调互动优化运行的目标,需要对发、输、变、配、用“物理一张网”进行数字建模,构建为各个业务部门提供数据服务的“电网拓扑结构关联一张图”。文章在介绍智能电网构成和云雾边技术架构的基础上,提出了基于变电站自动化系统和智能台区分别建设能量管理系统的雾节点和边节点,对“电网一张图”提供在线维护和自动更新的策略,然后讨论了这一策略涉及到的图数据库与电力图计算、电网图模型在线更新、低压配电网拓扑结构辨识等关键技术。此策略将“源-网-荷-储”各种环节以“电网一张图”的形式紧密连接,为智能电网的高效运行提供了技术基础。

Research on Maintenance and Automatic Update Strategy of One Graph of Power Grid Based on Concept of Cloud–Fog–Edge Collaboration

In order to realize the goal of smart grid“source–grid–load–storage”coordinated interaction and optimized operation,it is necessary to digitally model the generation,transmission,transformation,distribution,and utilization one network of physical power grid equipment to construct one network of grid topology association which can provide the data services for various business departments.Based on the introduction of smart grid composition and cloud–fog–edge technology architecture,this paper proposes an idea of building fog nodes and edge nodes based on substation automation system and smart transformer district to build energy management systems respectively,providing online maintenance and automatic update of strategy for“one network of power grid”,and then discusses key technologies such as graph database and power graph calculation,online update of grid graph model,and identification of topology structure of low–voltage distribution network.This strategy tightly connects the various parts of source–grid–load–storage in the form of one network of power grid,and provides a solid technical foundation for the efficient operation of the smart grid.