本文選題：變壓器 + 光聲光譜��； 參考：《遼寧工程技術(shù)大學(xué)》2014年碩士論文

【摘要】：在變壓器的長期運(yùn)行中,變壓器油中會產(chǎn)生一些微量的氣體而導(dǎo)致電力變壓器出現(xiàn)故障,而這些微量氣體的含量從一定程度上能夠反映電力變壓器的故障類型。本文重點(diǎn)分析了變壓器油中乙炔(C2H2)氣體的含量,進(jìn)而判斷變壓器是否產(chǎn)生電弧或者有局部放電,這對電力變壓器的穩(wěn)定運(yùn)行具有重要意義。在對變壓器油中乙炔氣體的含量進(jìn)行研究時采用了光聲光譜技術(shù),與傳統(tǒng)的檢測技術(shù)相比,光聲光譜技術(shù)能夠方便快捷的準(zhǔn)確檢測待測氣體的濃度,從而快速確定電力變壓器是否存在故障及故障類型。論文首先對光聲信號的激發(fā)原理作了簡要介紹,并通過理論分析得出光聲信號在圓柱形光聲池中的振幅以及與其它參數(shù)之間的關(guān)系。針對電力變壓器油中溶解的乙炔氣體組建了一個檢測其含量的裝置,對其中的組成部件進(jìn)行了簡要的論述,并分析研究了該裝置所產(chǎn)生的噪聲。通過理論分析以及乙炔氣體的相關(guān)查詢得到其特征吸收譜線,并以此為基礎(chǔ)分析了從注入電流以及工作溫度兩方面控制激光器而得到合適的輻射波長,通過實(shí)驗(yàn)手段研究了C2H2吸收系數(shù)與溫度和壓強(qiáng)之間的關(guān)系以及確定光聲池實(shí)際的相關(guān)參數(shù)；其次,鑒于光聲信號會受到眾多因素的影響,本文通過實(shí)驗(yàn)分別研究了各自單一因素對氣體光聲信號的影響,檢驗(yàn)了本實(shí)驗(yàn)裝置的性能,為下一步的實(shí)際應(yīng)用積累了一定的經(jīng)驗(yàn)；最后采用最小二乘回歸的方法對變壓器油中乙炔氣體濃度進(jìn)行分析,并與采用氣相色譜檢測得出的數(shù)據(jù)相比,證明了該方法的準(zhǔn)確性和實(shí)用性。
[Abstract]:In the long run of transformer, some trace gases will be produced in transformer oil, which will lead to the fault of power transformer, and the content of these trace gases can reflect the fault type of power transformer to a certain extent. In this paper, the content of acetylene C _ 2H _ 2 gas in transformer oil is analyzed, and it is important to judge whether the transformer produces arc or partial discharge, which is of great significance to the stable operation of power transformer. In the study of acetylene gas content in transformer oil, photoacoustic spectroscopy is used. Compared with traditional detection technology, photoacoustic spectroscopy can conveniently and accurately detect the concentration of gas to be measured. In order to quickly determine the power transformer whether there are faults and fault types. Firstly, the excitation principle of photoacoustic signal is briefly introduced, and the amplitude of photoacoustic signal in cylindrical photoacoustic cell and its relationship with other parameters are obtained by theoretical analysis. A device for detecting the content of acetylene gas dissolved in the oil of power transformer is set up. The components of the device are discussed briefly and the noise produced by the device is analyzed and studied. The characteristic absorption spectrum of acetylene gas is obtained by theoretical analysis and related inquiry of acetylene gas. Based on this, the appropriate radiation wavelength is obtained by controlling the laser from two aspects of injection current and operating temperature. The relationship between the absorption coefficient of C2H2 and temperature and pressure and the actual parameters of photoacoustic cell are studied by experimental means. Secondly, the photoacoustic signal is affected by many factors. In this paper, the effects of each single factor on the photoacoustic signal of gas are studied, and the performance of the experimental device is tested, which accumulates some experience for the practical application in the next step. Finally, the concentration of acetylene in transformer oil is analyzed by least square regression method, and compared with the data obtained by gas chromatography, the accuracy and practicability of the method are proved.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM407

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本文編號：1895221