中低压输电线路故障诊断方法的研究

发布时间：2018-09-06 06:23

【摘要】：日常生活中如果输电线路发生故障而不能及时的进行恢复,不仅会对人们的正常生活造成很大的影响,还会对企业的正常生产运行造成很大的损失,严重的话甚至会危及电力系统的安全稳定运行。因此,一个准确、可靠的并且适用于铁路系统配电网复杂线路结构下的故障定位方法不仅有助于缩短传统方法下冗长的故障查找时间,保证铁路供电系统能够快速的进行恢复,还可以找出线路上的薄弱环节,降低由于线路发生故障而造成的损失,具有很高的经济价值和研究价值。本文首先介绍了铁路自闭线路和贯通线路的特点和线路的结构,之后介绍了常用的几种行波测距方法,再根据铁路配电网的特点选择了双端D型行波测距方法,接着,结合测距方法介绍了铁路输电线路上的行波信号的提取和信号的测量。然后,本文介绍了行波定位系统的设计,从硬件设计和软件设计两部分对行波定位系统进行了详细的描述,最后重点对设计完成的行波定位系统进行了相关的测试验证。本文的创新之处在于从传统的行波测距方法中结合铁路自闭线路和贯通线路的特点,选择了合适的测量原理,并将其设计出来进行了相关的测试,可以有效的解决铁路配电网系统故障发生后无法准确判断故障点位置的现象,为铁路的故障抢修创造了十分有利的条件。
[Abstract]:In daily life, if the transmission line fails and cannot be restored in time, it will not only have a great impact on the normal life of people, but also cause great losses to the normal production and operation of enterprises. If serious, it will even endanger the safe and stable operation of power system. Therefore, an accurate, reliable and suitable fault location method for complex line structure of railway distribution network is not only helpful to shorten the long fault finding time under the traditional method, but also to ensure the rapid recovery of railway power supply system. It can also find out the weak link on the line and reduce the loss caused by the fault of the line, which has high economic value and research value. This paper first introduces the characteristics and structure of the railway self-closing line and the through-through line, then introduces several commonly used traveling wave ranging methods, then selects the dual-terminal D type traveling wave ranging method according to the characteristics of the railway distribution network, and then, Combined with ranging method, this paper introduces the extraction and measurement of traveling wave signal on railway transmission line. Then, this paper introduces the design of the traveling wave positioning system, describes the traveling wave positioning system in detail from the hardware design and the software design, and finally focuses on the relevant testing and verification of the designed traveling wave positioning system. The innovation of this paper is that combining the characteristics of the railway self-closing line and the through-through line with the traditional traveling wave ranging method, the appropriate measurement principle is selected, and the relevant test is carried out. It can effectively solve the problem that the location of fault points can not be accurately judged after the fault of railway distribution network occurs, which creates a very favorable condition for the fault repair of railway.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM755

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