發(fā)布時間：2018-01-06 06:24

  本文關鍵詞：大型油浸式自冷變壓器溫升的研究　出處：《浙江工業(yè)大學》2014年碩士論文　論文類型：學位論文

  更多相關文章： 變壓器 自然油循環(huán) 導向結構 光纖測溫 溫升

【摘要】：油浸式變壓器具有電壓等級高、散熱好、損耗低、容量大、價格低等特點。目前電網(wǎng)上運行的電力變壓器大部分為油浸式變壓器,其中80%以上是采用自然油循環(huán)的冷卻方式。為了解決大型電力變壓器的噪音大和油流帶電等問題,現(xiàn)在大型電力變壓器也普遍采用自然油循環(huán)冷卻方式。采用自然油循環(huán)冷卻方式會導致變壓器銅油溫差加大,變壓器的熱問題就更加突出�，F(xiàn)在變壓器廠普遍采用的油浸式變壓器溫升的工程計算方法根據(jù)經(jīng)驗公式,不能很好的反應變壓器的實際溫升,有時可能產(chǎn)生較大的偏差。本文根據(jù)傳熱學基本原理和經(jīng)典試驗換熱準則,通過對變壓器發(fā)熱冷卻原理進行分析和研究,總結出了一套能夠比較準確計算自然油循環(huán)冷卻和繞組帶導向結構的大型電力變壓器平均油溫升、頂層油溫升、繞組溫升的計算方法。并對影響變壓器溫升的主要因素：總損耗、散熱器位置、繞組的結構進行了分析。最后通過和三變科技的產(chǎn)品SSZ10-ZN-240000/220帶光纖測溫的溫升試驗得出的結果進行驗證,計算值和試驗值比較接近,可以滿足工程使用需要。
[Abstract]:The oil-immersed transformer has the characteristics of high voltage grade, good heat dissipation, low loss, large capacity, low price and so on. At present, most of the power transformers running on the power network are oil-immersed transformers. In order to solve the problems of large power transformer such as high noise and electrified oil flow, more than 80% of them adopt natural oil circulation cooling method. Now large power transformers also generally use natural oil cycle cooling mode. Natural oil cycle cooling mode will lead to transformer copper oil temperature difference increase. Nowadays, the engineering calculation method of oil-immersed transformer temperature rise, which is widely used in transformer factory, can not reflect the actual temperature rise of transformer well according to the empirical formula. According to the basic principles of heat transfer and classical experimental heat transfer criterion, the principle of transformer heating and cooling is analyzed and studied in this paper. The average oil temperature rise and the top oil temperature rise of large power transformer with natural oil cycle cooling and winding guide structure are summarized. Calculation method of winding temperature rise. Main factors affecting transformer temperature rise: total loss, radiator location. The structure of the winding is analyzed. Finally, the results obtained from the temperature rise test of SSZ10-ZN-240000/220 with optical fiber are verified. The calculated value is close to the experimental value, which can meet the need of engineering use.
【學位授予單位】：浙江工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM411

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相關期刊論文 前1條

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本文編號：1386679