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            [1]劉雲鵬,程槐號,胡 煥.頻率響應複數值在電力變壓器故障診斷中的應用[J].高壓電器,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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            頻率響應複數值在電力變壓器故障診斷中的應用()
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            《高壓電器》[ISSN:1001-1609/CN:61-11271/TM]

            卷:
            第55卷
            期數:
            2019年07期
            頁碼:
            10-14,26
            欄目:
            研究與分析
            出版日期:
            2019-07-31

            文章信息/Info

            Title:
            Application of the Complex Values of the Frequency Response in Fault Diagnosis of Power Transformer
            作者:
            劉雲鵬 程槐號 胡 煥
            (華北電力大學河北省輸變電設備安全防禦重點實驗室, 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)
            關鍵詞:
            變壓器 繞組變形 頻率響應法 相位 故障診斷
            Keywords:
            transformer winding deformation FRA phase fault diagnosis
            DOI:
            10.13296/j.1001-1609.hva.2019.07.002
            摘要:
            頻率響應分析法是現場用于檢測電力變壓器內部機械缺陷的重要方法。目前有幾種不同的、用于分析頻率響應法結果的方法,其中最常用的就是利用數值指標(如相關系數、均方差等)得出不同頻響曲線之間的差異性。然而,傳統的數值指標都只使用了頻率響應結果的幅值,其對于變壓器繞組微小變形的檢測靈敏度不夠理想。因此,文中提出了一種同時考慮頻率響應結果幅值和相位的數值指標及一種改進傳統數值指標的方法;然後通過實驗得到了不同軸向微小變形程度繞組的頻率響應數據;最後將不同的數值指標應用于實驗所得數據並進行了對比試驗,驗證了所提出數值指標及改進數值指標的優越性。試驗結果表明,同時考慮頻率響應結果幅值和相位可以提高頻率響應分析法對于繞組微小變形的檢測靈敏度,有利于提高電力變壓器故障診斷水平。
            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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            備注/Memo

            備注/Memo:
            收稿日期:2018-11-20; 修回日期:2019-01-18 基金項目:廣東電網公司科技項目(GDKJ00000021)。 Project Supported by Science and Technology Project of Guangdong Power Grid Company(GDKJ00000021).劉雲鵬(1976—),男,教授,博導,博士後,研究方向爲特高壓輸電技術、電氣設備在線檢測和外絕緣方面。 程槐號(1992—),男,碩士研究生,研究方向爲變壓器繞組變形方面。 胡 煥(1993—),男,碩士研究生,研究方向爲變壓器建模及繞組變形檢測方面。
            更新日期/Last Update: 2019-07-15