牵引变电所微机保护装置方案研究

根据牵引变电所对保护装置的特殊要求，提出了一种结合数字信号处理器DSP(Digital Signal Pmcessor)技术和以太网高速通信技术的双CPU结构牵引变电所微机保护装置的设计方案。该方案中保护CPU采用高性能32bit浮点DSP芯片TMS320VC33，通过可编程逻辑器件CPLD(Complex Programmable Logic Device)进行I／O扩展，配合16bit并行A／D，完成多通道高速率采样和保护计算的任务：监控CPU采用具有ARM7DMI CPU核的S3C4480X芯片，完成人机接口和通信功能，片内移植ucLinux嵌入式多任务系统，实现了符合IEC61850标准的以太网间隔层通信。经过现场试运行，证实该装置可靠。

Scheme of microprocessor-based protection equipment for traction substation

According to the special demands of traction substation,a scheme of microprocessor-based protection equipment with dual- CPU configuration is put forward,which combines DSP(Digital Signal Processor) technology and Ethernet-based high-speed communication technology. The CPU for protection adopts 32-bit DSP TMS320VC33,which realizes I / O expansion with CPLD(Complex Programmable Logic Device),completes multi-channel high-speed sampling with 16-bit parallel A / D and carries out protective calculation. The CPU for supervision adopts S3C44B0X with the core of ARM7DMI,which realizes man-machine interface and communication . An embedded operation system of ucLinux is installed,which meets the requirement of Ethernet communication based on TCP/IP protocol by IEC 61850 standard. The field trial operation proves its reliability.