本文選題：變壓器　切入點：繞組變形　出處：《華北電力大學》2014年碩士論文

【摘要】：變壓器在電力系統(tǒng)中發(fā)揮著重要作用,它的安全運行直接決定著整個電網(wǎng)的安全運轉(zhuǎn)。變壓器繞組是變壓器的核心部分之一,在近年來的變壓器損壞事故中,由于變壓器的繞組變形導致的事故占相當大一部分。為了及時發(fā)現(xiàn)并排除變壓器繞組的潛在隱患,研究變壓器繞組變形的檢測與診斷方法具有十分重要的意義。在眾多檢測方法中,頻響分析法具有操作簡單、重復性好、可靠性高等優(yōu)點,普遍應用于國內(nèi)外,但是其在分析和診斷技術上還有待提高。因此,深入研究基于頻響法的變壓器繞組變形的檢測與診斷方法是很必要的。本文通過理論分析、現(xiàn)場實際應用和多年的工作經(jīng)驗,針對唐山供電公司,研究了基于頻響法的變壓器繞組變形的檢測、診斷方法以及規(guī)程,進而在實踐中加以驗證。本文通過分析變壓器遭受短路電流沖擊時的過電流以及繞組在電磁場中所受的電磁力,總結了變壓器繞組變形的原因及形式。通過頻響測試儀的應用,探討了頻響法在實際工作現(xiàn)場中遇到的問題,并提出解決措施。在分析頻譜的方法應用上引入相關系數(shù)法和差值法,建立適合于唐山供電公司的變壓器繞組變形檢測與診斷方法及規(guī)程,并將該方法在實際工作中加以驗證。實踐表明,該方法在工作現(xiàn)場中應用良好,能夠較準確的判斷變壓器繞組故障。并且提出頻響法的局限性,作為一種檢測方法,它目前還不是很完善,需要輔助多種方法來診斷變壓器繞組故障。
[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.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM41

【參考文獻】

相關期刊論文 前1條

1 馬繼先,郭東升;變壓器繞組變形判據(jù)的研究[J];華北電力技術;1998年07期

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本文編號：1685629