文档介绍：华中科技大学
硕士学位论文
新型发变组故障录波数据采集站的设计
姓名:徐鹏华
申请学位级别:硕士
专业:检测技术与自动化装置
指导教师:魏丰
20060509
摘要
现代电力系统中,大型发电机-变压器组(以下简称发变组)大量投入运行。
发变组一旦发生故障,将会造成巨大损失。故障录波系统为分析故障原因、故障性
质,研究反故障措施提供了直接依据。因此,针对发变组的故障录波是目前迫切需
要研究的课题。
本文介绍了发变组故障录波的整体结构和工作流程,并根据电力行业标准DL/T
873-2004《微机型发电机变压器组动态记录装置技术条件》(以下简称新标准),对
原有发变组故障录波器进行分析,针对其采集通道少、数据传输速率低、采集站软
件兼容性差等缺陷,提出了一种新型发变组故障录波数据采集站的设计方案。
新型采集站使用集中化设计结构,以DSP和CPLD为核心集中采集发变组被监测
电量,实现96路模拟量、128路开关量的96点/工频周期采样。同时,采样数据附有
GPS同步时间信息,精度达到200微秒。录波数据通过PCI总线进行传输,文中详细
介绍了PCI总线的配置空间和配置过程。采集站PCI中断处理程序中,通过模式切换,
CPU在保护模式下访问4G字节的内存空间。采集站软件对采样数据进行故障算法判
据,故障数据通过网络接口向分析站上传。
文中对于整个调试过程中出现的问题、解决方案进行了归纳总结,并根据新标
准的要求设计方案对采集站进行测试,验证系统实际运行性能。实测结果表明,本
系统的采集通道多,采样速度快,故障启动准确性高,达到了预期的设计要求,为
整个故障录波系统的稳定运行提供了可靠保障。

关键词:故障录波; 集中化结构; PCI; 模式切换

I
Abstract
Large scale Generator-Transformer Unit (GTU) has been widely used in modern
power system. Once fault happens, serious damage will be done. Fault recorders provide
direct basis to analyze the origin and character of faults, and study countermeasures for
anti-accidents. Therefore, it is especially necessary to study fault recording for GTU
presently.
Firstly, the thesis introduces the framework and working flow of fault recorders for
GTU. It analyzes some defects exiting in current recorders such as few channels, low
sampling rate, low speed of data transmission, patibility of software in collection
point and so on, according to DL/T 873-2004 Specification of Microprocessor-based
Generator-Transformer Unit Dynamic Recorder. Finally, a new Data Acquisition Station
(DAS) design is presented for fault recording.
The concentrated architecture is adopted in the new DAS to replace modularization.
Its analog channels are sampled under the control of DSP and CPLD. Sampled data with
precise GPS time tag is transmitted through PCI bus. DAS software plishes fault
algorithm, system memory management, and CPU mode transition from real to protected
mode. Fault date is sent t