电力调度数据网传输特性分析

电力调度数据网承载着大量关键信息的交互任务,其安全性与可靠性影响着电力系统的生产管理和调度运行。建立了电力调度数据网的数据传输模型,定义了数据包拥塞率并将其作为评估信息拥塞程度的指标。模型计及了调度数据网中信息流向的特点,考虑了垂直信息流和随机信息流2种典型的信息流模式。分析了具有星型结构和网状结构的调度数据网的传输特性,并通过模拟核心节点和关键线路遭受攻击的场景,进一步对比了2种结构的调度数据网在遭受攻击时的传输特性变化。仿真结果表明:电力调度数据网的传输特性与拓扑结构有着紧密的关系。正常情况下,星型网络比网状网络具有更优的传输性能,其缓解信息拥塞的能力更强;遭受攻击后,星型网络和网状网络的传输特性呈现不同程度的恶化,其中星型网络恶化得更为严重,表现出较强的脆弱性。

Transmission Characteristics Analysis of the Electric Power Dispatching Data Network

Electric power system dispatching data network(EPSDDN) carries the mission of numerous crucial information interactions,whose security and reliability have great impact on the management and operation of power system.The data transmission model was built to analyze the transmission characteristic of EPSDDN,and the packet congestion rate was used as information congestion indicator in this paper.Meanwhile,the model took the direction of information flow into account and defined two typical information flow modes,which were vertical information flow and random information flow.The transmission characteristics of EPSDDNs with star and mesh structure were investigated.Furthermore,the transmission characteristics of two EPSDDNs under attacks were investigated with removal of the core nodes and the key links.Simulation result shows that,there is a close relationship between the transmission characteristic of NPSDDN and network structure.In the normal case,the star network has better performance than the mesh network because of its outstanding capability to relieve the information congestion;while under attacks,the transmission performance of two EPSDDNs show varying degrees of deterioration,and the star network exposes much higher vulnerability than the mesh network does.