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

Article retrieval

文章檢索

首頁 >> 文章檢索 >> 往年索引

變壓器直流偏磁產(chǎn)生機理及偏磁電流實測研究

來源:電工電氣發(fā)布時間:2016-04-06 15:06 瀏覽次數(shù):21

變壓器直流偏磁產(chǎn)生機理及偏磁電流實測研究 

劉康,溫定筠,胡春江,張秀斌,何巍 
國網(wǎng)甘肅省電力公司電力科學(xué)研究院,甘肅 蘭州 730050 
 

摘 要:闡述了變壓器直流偏磁產(chǎn)生的原因,介紹了由地磁擾動引起的地磁感應(yīng)電流和直流輸電產(chǎn)生的地中直流,研究了直流偏磁對變壓器的影響,并通過對酒泉地區(qū)變壓器偏磁電流、振動以及噪聲進行測試和分析,證實了變壓器直流偏磁的嚴重程度受偏磁電流大小的影響。依據(jù)實測結(jié)果,比較了兩種中性點直流電流測量方法,認為電阻法適合測量中性點單點接地的變壓器,而傳感器法適合測量中性點有多個接地點的變壓器。
關(guān)鍵詞:變壓器;直流偏磁;中性點;直流電流測量
中圖分類號:TM401+.1 文獻標識碼:A 文章編號:1007-3175(2014)12-0026-05


Study on Mechanism of Transformer DC Magnetic Bias and Its Current Measurement 

LIU Kang, WEN Ding-jun, HU Chun-jiang, ZHANG Xiu-bin, HE Wei 
Electric Power Research Institute of Gansu Electric Power Corporation, Lanzhou 730050, China 
 

Abstract:Description was made on the causes of transformer DC magnetic bias generation and introduction was made to grounding magnetic induction current caused by grounding magnetic disturbance and grounding current caused by DC transmission. This paper studied impact of DC magnetic bias on transformer and carried out measurements and analysis for Jiuquan area transformer magnetic bias current, vibration and noises, which proved that the severity degree of transformer DC magnetic bias was depended on the magnetic bias current value. According to actual measurement result, this paper compared two kinds of neutral point grounding DC current measurements methods. It is considered that resistance method is better for transformer with neutral point single grounding and sensor method is better for neutral point with multiple grounding transformers.
          Key words: transformer; DC magnetic bias; neutral point; DC current measurement


參考文獻
[1] 董霞.變壓器直流偏磁研究[D].濟南:山東大學(xué),2013.
[2] 蔣偉.UHVDC輸電引起的變壓器直流偏磁及其抑制措施的研究[D].成都:西南交通大學(xué),2009.
[3] 劉春明.中低緯度電網(wǎng)地磁感應(yīng)電流及其評估方法研究[D].北京:華北電力大學(xué),2009.
[4] 馬曉冰,F(xiàn)erguson I J,孔祥儒,等.地磁感應(yīng)電流(GIC)的作用與評估[J].地球物理學(xué)報,2005(6):69-74.
[5] 任志超.直流系統(tǒng)接地極電流場的分布特性及其對交流電網(wǎng)影響的研究[D].成都:西南交通大學(xué),2008.
[6] 劉連光,崔明德,孫中明,等.±800 kV直流接地極對交流電網(wǎng)的影響范圍[J].高電壓技術(shù),2009,35(6):1243-1247.
[7] 蒯狄正.電網(wǎng)設(shè)備直流偏磁影響檢測分析與抑制[D].南京:南京理工大學(xué),2005.
[8] 蒯狄正,劉成民,萬達.直流偏磁對變壓器的影響研究[J].江蘇電機工程,2004,23(3):1-5.
[9] 陳青恒,馬宏彬,何金良,等.直流偏磁引起的500kV電力變壓器振動和噪聲的現(xiàn)場測量與分析[J].高壓電器,2009,45(3):93-96.
[10] 李俊,彭中華.直流大電流測量技術(shù)研究[J].儀表技術(shù),2010(6):27-29.