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介绍了一种基于PowerPC硬件平台和嵌入式Linux操作系统的采样单元,该采样单元通过PowerPC的网络协处理器和PCI总线扩展百兆以太网接口,可以同时与4个合并单元通过IEC61850-9-1协议进行通信。分析了Linux系统的调度性能,并结合电力系统的实际应用,对其进行适当修改,重点介绍了嵌入式Linux操作系统在PowerPC平台上网络处理的高实时性和高可靠性的实现方法,同时还介绍了其在SCS-600数字式安全稳定控制装置上的验证情况。结果表明,该平台单板可以采样处理4个合并单元的信息,网络通信的实时性和可靠性能够满足IEC61850的要求,并能够很好地满足安全稳定控制装置对信息采样的多元件、高速率、高可靠性的要求。
A sampling unit based on PowerPC hardware platform and embedded Linux operating system is introduced. The sampling unit extends the Fast Ethernet interface through PowerPC’s network coprocessor and PCI bus, and can simultaneously and 4 merging units pass IEC61850-9- 1 agreement to communicate. This paper analyzes the scheduling performance of Linux system and modifies it with the practical application of power system. The realization method of high real-time and high reliability of network processing in embedded Linux operating system on PowerPC platform is emphatically introduced Describes its verification of the SCS-600 digital safety and stability control device. The results show that the platform veneer can sample and process the information of four merging units. The real-time and reliability of network communication can meet the requirements of IEC61850, and can well meet the requirements of safety and stability control devices for multi-component information sampling, high rate , High reliability requirements.