金沙发电厂机组故障录波装置的软件开发及研究
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摘要
论文根据发电机组故障特点,结合故障录波的相关国标和部标,制定了对大型机组故障录波的基本要求对录波记录格式、记录时间等主要技术指标作了规定。
     制定了软件系统结构,确定了数据采集及处理装置的软件开发平台为IRMX for WINDOWS实时多任务操作系统,分析机软件基于WINDOWS操作系统。在人机界面进行录波的系统参数,启动量的整定,分析选择和输出结果,非常方便。用VC++语言编制了程序。
     录波数据的记录格式采用IEEE的COMTRADE标准。利用该标准记录数据中的冗余量,进行压缩是一新思路,对无损压缩和有损压缩进行了大量仿真,采用信号源符号1Byte的自适应二阶算术编码无损压缩法,使远传数据压缩率可达72%,解决了录波数据远传中数据量大、传送时间长、成功率低的难题。
     详细研究了发电机定子绕组单相接地和失磁过程的电气量关系。在此基础上,首次提出用录波数据进行故障诊断,确定接地点在定子绕组上的位置,分析失磁全过程,有创新、有实用价值。
     录波装置样机已在贵州金沙发电厂投入生产运行,效果良好。
In ths thesis, the basic requirernen and softwaxe systeIn trictUre of large-sized
    generatOr fault recorder are presenied according to the fault feAn of large-sized gertr.
    The softWare developing Studio is selected and the soforare is been programmed by VC++.
    The data comPession technology is researched, and the PrOblem is solved Which qUanties
    of fault recording data are huge and the sending time is long. The transmission success
    ratio is boroved greatly.
    The electrical relation of single phase-earth fault of generator Stator windings is
    ndied in detail, and the process of generator losing magnetism faul is also discussed.
    Based on the result, fault diagnostication according tO fault recording data and locating the
    fault position of StatOr windings are p[It forward for the firSt time, it is irmovative and
    Practical.
    The fault recorder based on the thesis has been successfully PrOduced, and it is
    operating and working well.
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