基于SDN的智能电网数据流量传输与优化机制研究

当前智能电网的信息通信系统中的流量业务服务需求多种多样，网络设备种类多协议杂，且人工运维难度大成本高。为解决此类问题，本项目借助软件定义网络SDN技术对智能电网的数据流量传输架构进行优化。首先，针对三种典型的电网通信场景（广域测量保护系统、先进测量设施系统、变电站内部自动化系统），分别根据其通信特点和需求设计相应的SDN+电网总体通信架构；其次，对三种场景下的流量传输优化问题进行建模求解，在建模过程中，将智能电网作为一个整体进行考量，把通信网和电网之间的耦合作用也考虑到建模的约束和优化目标中，使理论研究更贴合电网实际运行模式；最后，为验证所提流量传输优化机制的优势，通过双域仿真信息交互的方式实现SDN+电网联合仿真平台，使基于SDN的智能电网模拟仿真成为可能。本项目将通信架构设计、问题建模求解、实验仿真验证等环节形成贴合真实系统的研究闭环，旨在为智能电网的信息通信系统建设探索新路径。

In the existing information communication system of smart grid, the demands of traffic flow services are varied, various types of network equipment and protocols co-exist, and the manual operation and maintenance is difficult and costly. In order to solve these problems, this project leverages the software-defined network (SDN) technology to optimize the data flow transmission architecture of smart grid. Firstly, for three representative power grid communication scenarios (wide area measurement and protection system, advanced metering infrastructure, substation automation system), the corresponding SDN + power grid communication architectures are designed according to their special communication features and requirements; secondly, the flow transmission optimization problems in the three scenarios are modeled and solved respectively, and in the modeling process the smart grid is taken as a whole system, such that the interaction between communication network and power grid is considered into the constraints and optimizing goals to make the theoretical analysis more practical; finally, to verify the advantages of the proposed flow transmission optimization mechanism, the SDN + power grid co-simulation platform is realized by the way of information exchange of the two domains, which makes the simulation of SDN-based smart grid possible. In this project, the communication architecture design, problem modeling and solution, and experimental simulation verification are formed as a closed-loop research that fits the real system, aiming to explore new paths for the construction of information communication system of smart grid.