电力变压器绕组变形检测与诊断技术的现状与发展

发布时间：2018-02-02 15:02

本文关键词： 电力变压器绕组变形变形检测诊断技术影响因素相关系数频率复杂度　出处：《高电压技术》2016年04期 　论文类型：期刊论文

【摘要】：随着电网容量的日益增大,短路故障造成的变压器损坏事故呈上升趋势。及时有效采取检测手段对变压器绕组变形进行测试,能有效防止变压器已有变形的进一步恶化,最大限度地保证变压器不发生事故。从绕组变形的检测方法、检测原理、检测结果的影响因素和判断准则等几个方面进行归纳,综述了近年来变压器绕组变形领域的重要研究成果。同时,结合实际应用案例,从检测方式、测试结果的影响因素、检测信息量、检测灵敏度、变形判断方法及检测标准等角度对不同检测方法进行了分析比较。结果表明,扫频阻抗法能够较好地弥补低电压短路阻抗法和频率响应法在不同形式绕组变形灵敏度上的差异,提高绕组变形诊断的有效性;振动带电检测法无需停电就可开展变压器绕组变形检测。相比其它检测方法扫频阻抗法和振动带电检测法具有较明显优势,建议开展进一步现场应用研究,提高检测手段成熟度和变形判断方法的准确性。
[Abstract]:With the increasing capacity of the power network, transformer damage accidents caused by short-circuit faults are on the rise. Timely and effective means are taken to measure the transformer winding deformation. It can effectively prevent the further deterioration of the existing deformation of the transformer, and maximize the protection of the transformer from accidents. From the winding deformation detection method, detection principle. The influence factors and judgment criteria of the test results are summarized, and the important research achievements in the field of transformer winding deformation in recent years are summarized. At the same time, combined with practical application cases, the detection method is introduced. The factors influencing the test results, the amount of information, the sensitivity, the deformation judgment method and the detection standard are analyzed and compared. The frequency sweep impedance method can make up the difference between low voltage short circuit impedance method and frequency response method in different forms of winding deformation sensitivity and improve the effectiveness of winding deformation diagnosis. Vibration live detection method can be used to detect transformer winding deformation without power outage. Compared with other detection methods, sweep impedance method and vibration live detection method have obvious advantages. It is suggested that further field application research be carried out. Improve the maturity of the means of detection and the accuracy of the deformation judgment method.
【作者单位】：国网浙江省电力公司电力科学研究院;国网浙江省电力公司省检修公司;
【基金】：国家电网公司科技项目(5211DS16000G) 国网浙江省电力公司科技项目(5211DS150026)~~
【分类号】：TM41
【正文快照】： 0引言1电力变压器是电力系统中重要的电气设备之一,其安全运行直接影响着供电的安全性和可靠——性[1]。近年来,我国的电力事业发展极快,随着电网容量的不断增大,超高压与特高压电力系统的逐步建立,大容量、大区域互联和西电东送等复杂系统的即将形成,对电力系统的安全运行和

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