文档介绍：摘要
摘要
随着社会对电力资源需求的不断增长,变电站的数量逐步增加,对变电站测
控终端的可靠性和技术水平要求日益提高,需要处理的信息量也越来越多。因此,
本文提出一种基于数字信号处理器(Digital Signal Processor,DSP)的变电站综合自
动化系统的测控方案,该方案以高性价比 DSP TMS320F2812 为核心控制器,整体
采用全分散式结构。
根据实际需求,给出了一种基于 DSP 的测控系统整体设计方案,重点对测控
系统终端的硬件功能电路和软件程序分别进行模块化设计,最终实现了对电网重
要数据的实时采集、参数计算、谐波分析、故障判断和接口通讯等功能。其中,
为进一步提高变电站线路测控终端的准确性和实时性,本论文主要对电力系统常
用的参数测量和保护计算算法进行了详细的分析,特别对快速傅立叶算法(Fast
Fourier Transformation,FFT)进行了深入的研究,并通过实验协调了计算速度和精
度,确定了最佳数据窗长度,并将傅立叶算法应用于本系统,从而缩短了以往进
行 FFT 变换所需的时间。
实验表明,本系统能够实现对运行参数的实时测量、保护、显示、通讯和报
警等功能,本系统为高性能 DSP 在电力系统中的应用提供了一个可行的方案。
关键词:变电站综合自动化;数字信号处理器(DSP);谐波分析;故障判断
Ⅰ
Abstract
Abstract
With the increase of electric requirement, the quantity of substation steps up
gradually, the reliability and techno-level of substation measure and control terminal
system are required higher and higher, more and more information need be disposed.
This dissertation proposes a measure and control terminal system design scheme of
substation integrated automation, in which a high cost performance Digital Signal
Processor (DSP for short) chip TMS320F2812 works as the central processor. The
whole distributed structure is applied to this system.
According to practical requirements, this dissertation proposes a measure and
control terminal system design scheme, especially hardware circuits and software
programs of the system were designed by modularization, which can implement
real-time data sample, parameter calculation, harmonic analysis, fault judgments,
munications functions and so on. Thereinto, the parameter measurements
and relay protection algorithms, especially the Fast Fourier Transform Algorithm (FFT
for short) are researched in detail, which can improve the precise and real-time
capacities of distribution power lines of power system. Applying the FFT algorithm to
this system, the calculation speed and precision was harmonized, simultaneously an
appropriate length of sample da