| 摘要: |
| 通信网络是数字化变电站的重要组成部分，尤其过程总线取代传统的硬接线，使得网络系统从二次延伸到了一次，大幅度增加了网络规模和网络流量；过程总线上传输的信息绝大多数要求有严格的实时性和高度的可靠性，因此，信息安全问题是威胁变电站安全、稳定、经济、优质运行的重大问题，需要引起足够重视。介绍了信息需求分类、信息合并等提高信息实时性的方法，提出将信息加密技术、防火墙技术、mobile agent、安全管理技术和虚拟专网（VPN）技术等网络安全技术应用于数字化变电站，并分析了具体应用方案及效果。 |
| 关键词: 数字化变电站 网络安全 防火墙 mobile agent VPN |
| DOI：10.7667/j.issn.1674-3415.2007.12.005 |
| 投稿时间：2006-12-20修订日期：2007-01-09 |
| 基金项目: |
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| Information disposal and network security analysis in digital substation |
| WU Guo-wei |
| (Zhejiang University, Hangzhou 310027, China) |
| Abstract: |
| Communication network plays an important role in digital substation.With the process bus instead of the traditional hard connection,substation network extends from the secondary system to primal system and the network scale and its flux increases greatly,which requires most of the information transmission real-time and with reliability,so the information security becomes more important for the secure,stable,economic and superior operation of substation.This paper introduces the method of the classification of information in order to increase its punctunality in substation. In the light of the computer network structure in substation some security strategies and measures are proposed and various techniques are described such as the firewall,mobile agent,virtual private network and data encryption algorithm and analyzes its effect. |
| Key words: digital substation network security firewall mobile agent VPN |
