数字变电站通信网络业务的自相似特性研究

文章在研究了基于IEC61850标准的数字化变电站通信网络的结构和通信数据流,分析了自相似业务的特点和建模方法的基础上,提出变电站的突发性业务流具有自相似特点.利用OPNET仿真在自相似业务模型下数字变电站通信网络的业务特性,结果表明变电层工程师站收到的保护动作反馈信息具有明显的自相似特性和突发性(H=0.677＞0.5),并且在这种自相似业务下,通信网络时延起伏较大,呈现出突发性和长相关性.

Research on Self-similar of Communication Network Business for Digital Substation

This paper firstly studies the structure and communication data streams of digital substation communication networks based on IEC61850 standard,and analyzes the characteristics and modeling methods of the self-similar business.Then it proposes that the burst traffic of substation also has a self-similar characteristic.In order to prove this view,this paper simulates the traffic in digital substation communication network through the OPNET software.Simulation results show that the protection information of feedback received by the engineering station with obvious self-similarity and burst feature(H=0.677>0.5).In this self-similar traffic,the delay of communication network is very volatile,and it shows burst and long-range dependence.