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| 摘要: |
| 针对星型以太网的拓扑结构在许多场合不能完全反映分散式厂站监控系统中监控设备和监控点分散分布的特点，提出了一种用于分散式厂站自动化监控领域的合理的系统组网模式，即环形以太网。应用IEEE802．1D或IEEE802．1W通信协议，解决了链路闭合引起的死循环问题，实现了以太网的环状连接。对环形以太网的运行机理、应用特点、技术要点、应用前景进行了分析，指出环形以太网应用和推广的关键是设计一种理想的环网接入模块，并提出了具体要求。 |
| 关键词: 分散式 厂站自动化 生成树 环形以太网 现场总线 |
| DOI： |
| 分类号:TM734 |
| 基金项目: |
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| Loop Ethernet-networking mode for distributed substation automation system |
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XU Ming ZHENG Chong YANG Xiao-song
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| Abstract: |
| The topological structure of start Ethernet does not completely meet the requirements of distributed substation automation system for the distribution of decentralized monitoring devices or points in many application conditions. A rational networking mode with loop Ethernet for it is thus presented. With the application of IEEE 802.ID or IEEE 802.1W communication protocol,the dead circulation caused by closed circit is avoided and the loop connection of Ethernet is realized. Its mechanism, features, technical essentials and prospect are analyzed. An ideal connection module is regarded as the key for applying and extending loop Ethernet, with some demands brought forward. |
| Key words: distributed,substation automation,span tree,loop Ethernet,field bus |
