线路保护装置采样值直采传输方案研究

Research of Scheme for SV Direct Sampling in Line Protection Device

分析了当前智能变电站采样值(SV)点对点发送处理机制,提出了一种满足过程层要求的高均匀性和一致性SV直采传输方法;应用FPGA实现DMA控制器和以太网MAC控制单元,对SV报文添加发送描述符,由FPGA根据描述符直接控制SV发送;采用Spartan-6系列架构FPGA,通过PCI Express总线,系统内部实现SV数据高速传输;此方案充分利用了FPGA的并行数据处理的特性及丰富的IP资源,设计实现了多路以太网点对点数据的高带宽和高可靠性传输,极大地提升了智能变电站系统的性能。

This paper analyzes the processing mechanism of SV point--to--point transmission in the current smart substation, and presents a method for the SV direct transmission of high uniformity and consistency to meet the requirement of process layer. This design uses FPGA to realize DMA controller and Ethernet MAC control unit. SV message to add transmit descriptor, FPGA directly controls SV trans- mission according to the descriptor. Using the architecture of Spartan--6 series FPGA, the system realizes the high--speed transmission of SV data through PCI Express bus. The design applies and takes full advantage of FPGA parallel data processing features and extensive IP resource, to achieve a high--bandwidth and high reliability of multi--channel Ethernet point--to--point data transmission. It is greatly enhances the smart substation system performance.