电力变压器绕组变形检测与诊断方法研究

发布时间：2018-03-30 11:00

本文选题：变压器　切入点：绕组变形　出处：《华北电力大学》2014年硕士论文

【摘要】：变压器在电力系统中发挥着重要作用,它的安全运行直接决定着整个电网的安全运转。变压器绕组是变压器的核心部分之一,在近年来的变压器损坏事故中,由于变压器的绕组变形导致的事故占相当大一部分。为了及时发现并排除变压器绕组的潜在隐患,研究变压器绕组变形的检测与诊断方法具有十分重要的意义。在众多检测方法中,频响分析法具有操作简单、重复性好、可靠性高等优点,普遍应用于国内外,但是其在分析和诊断技术上还有待提高。因此,深入研究基于频响法的变压器绕组变形的检测与诊断方法是很必要的。本文通过理论分析、现场实际应用和多年的工作经验,针对唐山供电公司,研究了基于频响法的变压器绕组变形的检测、诊断方法以及规程,进而在实践中加以验证。本文通过分析变压器遭受短路电流冲击时的过电流以及绕组在电磁场中所受的电磁力,总结了变压器绕组变形的原因及形式。通过频响测试仪的应用,探讨了频响法在实际工作现场中遇到的问题,并提出解决措施。在分析频谱的方法应用上引入相关系数法和差值法,建立适合于唐山供电公司的变压器绕组变形检测与诊断方法及规程,并将该方法在实际工作中加以验证。实践表明,该方法在工作现场中应用良好,能够较准确的判断变压器绕组故障。并且提出频响法的局限性,作为一种检测方法,它目前还不是很完善,需要辅助多种方法来诊断变压器绕组故障。
[Abstract]:Transformer plays an important role in power system, and its safe operation directly determines the safe operation of the whole power network. Transformer winding is one of the core parts of transformer. In order to detect and eliminate the potential hidden danger of transformer winding in time, the accidents caused by transformer winding deformation account for a large part of the accident. It is of great significance to study the detection and diagnosis methods of transformer winding deformation. Among the many detection methods, frequency response analysis has the advantages of simple operation, good repeatability and high reliability, and is widely used at home and abroad. Therefore, it is necessary to study the detection and diagnosis method of transformer winding deformation based on frequency response method. In this paper, through theoretical analysis, field application and many years of work experience, it is necessary to study the detection and diagnosis method of transformer winding deformation based on frequency response method. For Tangshan Power supply Company, the detection, diagnosis and regulation of transformer winding deformation based on frequency response method are studied. By analyzing the overcurrent of the transformer and the electromagnetic force of the winding in the electromagnetic field, the causes and forms of the transformer winding deformation are summarized, and the application of the frequency response tester is introduced. This paper discusses the problems encountered in practical work by frequency response method, and puts forward some solutions. The correlation coefficient method and difference method are introduced in the application of spectrum analysis method. The method and rules of transformer winding deformation detection and diagnosis suitable for Tangshan Power supply Company are established, and the method is verified in practice. The practice shows that the method is applied well in the work site. The limitation of frequency response method is put forward. As a kind of detection method, it is not perfect at present, and many auxiliary methods are needed to diagnose transformer winding fault.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM41

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