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根据IEC61850标准,归纳分析了数字化变电站内的各种典型数据流,运用明确的数学模型对其进行了详细描述,最终得出各类报文的数据包生成图。以IEC 61850-5规定的D2-1典型变电站为例,对其中存在的各种数据流及其流量大小进行了详细说明;利用OPNET仿真软件,应用优先级标签技术,对基于虚拟局域网(virtual local area network,VLAN)的集成型变电站综合通信网络进行了仿真分析,进一步研究了变电站通信网络中VLAN的配置方法和原则,对有无VLAN的星型网络进行了对比研究。结果表明,VLAN技术可以较好地解决变电站中的网络资源竞争以及部分安全性问题。
According to IEC61850 standard, this paper summarizes all kinds of typical data flow in digital substation, and describes it in a clear mathematical model. Taking the D2-1 typical substation according to IEC 61850-5 as an example, the various data streams and their flow sizes are described in detail. Using OPNET simulation software and priority label technology, area network and VLAN), the method and principle of VLAN configuration in substation communication network are further studied, and the star network with or without VLAN is compared. The results show that VLAN technology can better solve the network resource competition in substation and some security problems.