基于dsp的电力远动终端的研究.rar

基于DSP的电力远动终端的研究

目录

0前言……………………………………………………………………1
1概述…………………………………………………………………….2 
1.1变电站综合自动化的国内外发展现状……………………………2
1.2我国变电站综合自动化的主要问题………………………………2
1.3本设计的主要任务…………………………………………………3
2数字信号处理器TMS320LF2407A与CAN总线基础…………………7
2.1数字信号处理器TMS320LF2407A技术……………………………7
2.2 CAN总线技术………………………………………………………9
3电力参数采样算法及分析算法………………………………………13
3.1引言…………………………………………………………………13
3.2交流采样算法分析比较……………………………………………13
3.3离散傅立叶算法（DFT）…………………………………………15
4远动终端系统的结构设计……………………………………………19
4.1 RTU的总体设计方案………………………………………………19
4.2参数采集模块………………………………………………………20
4.3开关量输入（遥信）输出电路（遥控）…………………………24
4.4通信接口电路………………………………………………………25
4.5复杂可编程逻辑器件(CPLD)模块…………………………………27
4.6存储器扩展…………………………………………………………30
4.7显示模块……………………………………………………………31
4.8外围电路……………………………………………………………32
5系统软件设计…………………………………………………………35
5.1系统软件总体概述…………………………………………………35
5.2通信软件设计………………………………………………………39
6抗干扰设计……………………………………………………………44
6.1干扰信号的产生……………………………………………………44
6.2抗干扰设计…………………………………………………………44
7 技术经济分析………………………………………………………46
8总结……………………………………………………………………47
致谢……………………………………………………………………48
参考文献………………………………………………………………49
附录A …………………………………………………………………50
附录B……………………………………………………………………60

摘要

在目前国内的变电站自动化监控系统中，站内电力远动终端大部分还是采用串行口通信方式(RS232，RS485总线等)，且存在着串行通信传输速率慢，易受干扰且通信方式不灵活等缺点。且早期的远动终端(RTU)以单片机作为处理器，实时响应能力和信号处理能力差，无法满足变电站大量实时数据处理的要求。
本文就是基于这样的前提下提出了一种新型的以分布式为基础的电力远动终端系统。本RTU智能单元是以高性能数字信号处理器TMS320LF2407A为主控制器，以CAN总线作为通信网络构成分布式系统。使得远动终端的实时响应能力、数据通信能力和信号处理能力得到大大提高。
关键词：变电站自动化远动终端（RTU）；TMS320LF2407A；现场总线CAN

Abstract

Presently in the domestic substation automation monitori ng and control syste m,the serial communica tion pattern(RS232，RS485 bus and so on) hasbeing used in most power remote operated terminal system,there still have many de fects.For exa mple,the vel ocity of trans missi on adopting serial communic ation is ve ry slow,e asily disturbed,a nd the mode i s not flexi ble.And single-chi p micr ocomputer ha s been us ed in early remote terminal unit(RTU), because of the poor ability of real-time response and si gnal process,i t couldn’t satisfy the transmission of real-time data in the substation.
On the strength of the above-mentioned pre mise,a new distributed remot eterminal unit is introduced in the paper.In the intelligent remote terminal unit the high perfor mance Digital Signal Proc essor TMS320LF2407A is regarded as the controller,CAN bus is regar ded as co mmunicati ons network to make up distributed system.The ability of real-time response,communication of the da ta and si gna l process of remote operated terminal syste m has been enha nced grea tly.At the sa me ti me the software of Kingview has been used to design the interface of monitoring and control centre.And So the system can satisfy the need of the development of the substation automation system.
Key Words:Substation Automation； Remote Terminal Unit（RTU）；TMS320LF2407A ；Field Bus CAN； Communication