[1]刘云鹏,程槐号,胡 焕.频率响应复数值在电力变压器故障诊断中的应用[J].高压电器,2019,55(07):10-14,26.[doi:10.13296/j.1001-1609.hva.2019.07.002]
 LIU Yunpeng,CHENG Huaihao,HU Huan.Application of the Complex Values of the Frequency Response in Fault Diagnosis of Power Transformer[J].High Voltage Apparatus,2019,55(07):10-14,26.[doi:10.13296/j.1001-1609.hva.2019.07.002]
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频率响应复数值在电力变压器故障诊断中的应用()
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《高压电器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第55卷
期数:
2019年07期
页码:
10-14,26
栏目:
研究与分析
出版日期:
2019-07-15

文章信息/Info

Title:
Application of the Complex Values of the Frequency Response in Fault Diagnosis of Power Transformer
作者:
刘云鹏 程槐号 胡 焕
(华北电力大学河北省输变电设备安全防御重点实验室, 河北 保定 071003)
Author(s):
LIU Yunpeng CHENG Huaihao HU Huan
(Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, Hebei Baoding 071003, China)
关键词:
变压器 绕组变形 频率响应法 相位 故障诊断
Keywords:
transformer winding deformation FRA phase fault diagnosis
DOI:
10.13296/j.1001-1609.hva.2019.07.002
摘要:
频率响应分析法是现场用于检测电力变压器内部机械缺陷的重要方法。目前有几种不同的、用于分析频率响应法结果的方法,其中最常用的就是利用数值指标(如相关系数、均方差等)得出不同频响曲线之间的差异性。然而,传统的数值指标都只使用了频率响应结果的幅值,其对于变压器绕组微小变形的检测灵敏度不够理想。因此,文中提出了一种同时考虑频率响应结果幅值和相位的数值指标及一种改进传统数值指标的方法;然后通过实验得到了不同轴向微小变形程度绕组的频率响应数据;最后将不同的数值指标应用于实验所得数据并进行了对比试验,验证了所提出数值指标及改进数值指标的优越性。试验结果表明,同时考虑频率响应结果幅值和相位可以提高频率响应分析法对于绕组微小变形的检测灵敏度,有利于提高电力变压器故障诊断水平。
Abstract:
Frequency response analysis (FRA) is an important technique for detecting the mechanical defects inside a power transformer. There are several methods to interpret the FRA results, and the most common method is using the numerical index (such as correlation coefficient, mean square deviation, etc) to obtain the degree of deviation between different frequency response curve. However, the traditional numerical indices use only the magnitude response of the FRA results, which is not accurate enough for the detection of minor winding deformations. Therefore, a numerical index considering both the amplitude and phase of frequency response results and a method to improve the traditional numerical index are proposed. Then the frequency response data of different axial minor deformation windings are obtained through experiments. Finally, different numerical indices are applied to the experimental data and the results are compared to verify the superiority of the proposed numerical indices and the improved numerical indices. The results show that, the sensitivity of the frequency response analysis method to the minor winding deformations could be improved by considering both magnitude response and phase response of the FRA results, which is beneficial to improve the level of power transformer fault diagnosis.

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备注/Memo

备注/Memo:
收稿日期:2018-11-20; 修回日期:2019-01-18 基金项目:广东电网公司科技项目(GDKJ00000021)。 Project Supported by Science and Technology Project of Guangdong Power Grid Company(GDKJ00000021).刘云鹏(1976—),男,教授,博导,博士后,研究方向为特高压输电技术、电气设备在线检测和外绝缘方面。 程槐号(1992—),男,硕士研究生,研究方向为变压器绕组变形方面。 胡 焕(1993—),男,硕士研究生,研究方向为变压器建模及绕组变形检测方面。
更新日期/Last Update: 2019-07-15