微机保护装置中一种基于DSP的嵌入式以太网接口设计

基于IEC61850的变电站系统中,过程层与间隔层、间隔层与变电站层之间的通信方式将全部采用标准以太网方式,微机保护装置作为间隔层的智能电子设备也必然采用以太网进行通信.本文采用DSP芯片和网卡接口控制芯片设计了以太网接口,介绍了接口的硬件构成与DSP芯片对网卡接口控制芯片的控制过程,完成了嵌入式TCP/IP协议的选择.

Design of a Embedded Ethernet Interface Based on DSP in PC Protection Device

Standard Ethernet mode will be adopted to communicate between Apparatus Level and Bay Level or between Bay Level and Station Level in transformer substation system base on IEC61850. So, it is necessary to communicate between Digital Protection Device and other equipments through Ethernet since it is an intelligent electronic device which falls into Bay Level. It is illuminated in the article the design of Ethernet interface using DSP chip and Network Card interface control chip. Further more, the hardware structure and the control process of DSP chip to Network Card interface control chip are introduced, and the choice of embedded TCP/IP is also elucidated.