| 引用本文: | 朱来强,陈新之,高志勇.数字化变电站中广播风暴的防治[J].电力自动化设备,2010,(11): |
| ZHU Laiqiang,CHEN Xinzhi,GAO Zhiyong.Prevention of digital substation broadcast storm[J].Electric Power Automation Equipment,2010,(11): |
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| 摘要: |
| 以太网广播风暴的问题不但影响数字化变电站的通信效率，还可能造成设备工作不正常。在分析数字化变电站网络结构的基础上，提出选用支持组播协议的交换机，以免组播报文以广播方式发送。针对保护装置的设计，提出通过拒收广播包，使得过程层中不需要处理的广播报文直接在MAC层就被丢弃，不会进入软件处理环节；使用轮询式网卡驱动，减少频繁中断以及上、下文切换对CPU性能的损耗；选用多核CPU让保护运算和以太网报文收发分别由不同的核进行处理，并限制最大接收数据包的个数，以保证保护有足够的时间执行。 |
| 关键词: 数字化变电站 广播风暴 网络结构 网络接口 轮询机制 |
| DOI： |
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| Prevention of digital substation broadcast storm |
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ZHU Laiqiang, CHEN Xinzhi, GAO Zhiyong
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Guodian Nanjing Automation Co.，Ltd.，Nanjing 210003，China
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| Abstract: |
| The Ethernet broadcast storm affects the communication efficiency of digital substation and causes the malfunction of devices. Based on the structural analysis of digital substation network，the switch which supports the multicast protocol is proposed to avoid the broadcast transmission for multicast packets. In the design of protection equipment，the broadcast packets which should not be treated in process layer are discarded in MAC layer；the polling Ethernet driver is applied to reduce the interruptions and the CPU degrading caused by the switching between upper and lower packets. The multi-core CPU is employed to respectively implement the logic calculation and the Ethernet packet receiving and sending，and the maximum number of received packets is set to ensure the sufficient time for the implementation of protection. |
| Key words: digital substation broadcast storm network structure network interface polling mechanism |
