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    Suzhou Electric Appliance Research Institute
    期刊號: CN32-1800/TM| ISSN1007-3175

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    變壓器油紙絕緣系統(tǒng)頻域介電特性的影響因素研究

    來源:電工電氣發(fā)布時間:2018-01-22 09:22 瀏覽次數(shù):668
    變壓器油紙絕緣系統(tǒng)頻域介電特性的影響因素研究
     
    郭靖1,汪旭旭2
    (1 寧夏送變電工程公司,寧夏 銀川 750000;2 國家電網(wǎng)公司直流建設(shè)分公司,北京 100032)
     
        摘 要:為準(zhǔn)確檢測變壓器油紙絕緣系統(tǒng)的健康狀態(tài),利用試驗方法分別測試了水分、熱老化和溫度三種因素對頻域介電譜(FDS)的影響。在實驗室內(nèi)完成試品的制備和試驗平臺的搭建,通過絕緣診斷儀IDAX300分別對制備好的水分和老化試品在特定溫度下進(jìn)行FDS測試,并得到相應(yīng)的試驗數(shù)據(jù)和圖像。試驗研究表明:在全頻域10-4~103 Hz內(nèi)水分、熱老化、溫度對FDS有著不同的影響規(guī)律,且在頻域10-4~10-2 Hz內(nèi)隨著水分含量、熱老化時間、溫度的增大介質(zhì)損耗tanδ也逐漸增大,該方法為準(zhǔn)確檢測變壓器的健康狀態(tài)提供了理論依據(jù)。
        關(guān)鍵詞:變壓器;油紙絕緣;頻域介電譜;水分;熱老化;溫度;介質(zhì)損耗
        中圖分類號:TM411     文獻(xiàn)標(biāo)識碼:A     文章編號:1007-3175(2018)01-0051-03
     
    Study on Influence Factors of Frequency Domain Dielectric Properties of Transformer Oil Paper Insulation System
     
    GUO Jing1, WANG Xu-xu2
    (1 Ningxia Power Transmission and Transformation Engineering Company, Yinchuan 750000, China;
    2 DC Construction Branch of State Grid Corporation, Beijing 100032, China)
     
        Abstract: In order to accurately detect the health status of transformer oil paper insulation system, experiments were carried out to test the three influence factors including moisture, thermal aging and temperature on the frequency domain dielectric spectroscopy (FDS). The samples were prepared and the test platform was built in the laboratory. The prepared moisture and aging samples were respectively tested at specific temperature by diagnostic instrument IDAX300 and the corresponding test data and image were obtained. The test results show that the effects of water, thermal aging, temperature on FDS is different in the frequency domain from 10-4 Hz to 103 Hz, and the dielectric loss tanδ increases gradually with the increase of moisture content, thermal aging time and temperature in the frequency domain from 10-4 Hz to 10-2 Hz. This method provides a theoretical basis for the accurate detection of the transformer health status.
        Key words: transformer; oilpaper insulation; frequency domain dielectric spectroscopy; moisture; thermal aging; temperature; dielectric loss
     
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