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畢業(yè)設(shè)計(jì)英文翻譯-使用電超聲波技術(shù)檢測(cè)變壓器局部放電(存儲(chǔ)版)

  

【正文】 96,11(3):13791384 西安工程大學(xué)畢業(yè)設(shè)計(jì)(譯文) 11 [3] Tatsuo Takada, Acoustic and Optical Method for Measuring Electric Charge Distributions in Dielectrics. IEEE transactions on Dielectrics and Electrical Insulation, 1999, 6(5):519547 [4] Caixin Sun, Wenqi Zhao. Electricalacoustic and acousticacoustic locating method of transformer PD source and its evaluation study. Transactions of China Electrotechnical Society. 1997,12(5): 4952,60 [5] H. G. Kranz, A PD measuring and evaluation system based on digital signal processing. IEEE transactions on Dielectrics and Electrical Insulation, 2021, 7(1): 2129 [6] Yang Xu, Ming Yu, Xiaolong Cao, et al. Partial discharge pulse measurements and parison with the electrical measuring method. High Voltage Technology. 2021, 27(4):34 [7] , Identification of specific type of PD from acoustic emission frequency spectra. IEEE transactions on Dielectrics and Electrical Insulation, 2021, 8(4):598606 [8] Barry H. Ward A survey of new techniques in insulation monitoring of power transformers. IEEE Electrical Insulation Magazine, 2021, 17(3):1623 [9] Yanpeng Hao, Guoli Wang, Hengkun Xie, et al. Study on aging properties of stator insulation based on partial discharge and ultrasonic method. Transactions of China Electrotechnical Society. 2021, 17,( 2):16 [10] Caixin Sun, Bing Luo, Wenlin Zhao. Study on ultrasonic high sensitivity sensor for transformer partial discharge source location. Chinese Journal of Scientific Instrument. 1997,18(5): 453458 西安工程大學(xué) 本科 畢業(yè)設(shè)計(jì)(譯文) 12 使用電超聲波技術(shù)檢測(cè)變壓器局部放電 Wei Jiang, Fan Liu, Zhiyuan Wang Sichuan Electric Power Research Institute Chengdu, China 摘要: 局部放電( PD)是通常由變壓器絕緣的缺陷和惡化引起。脈沖電流法 。我們稱這種方法為電超聲波技術(shù)。 圖 2 變壓器局部放電超聲波檢測(cè)原理 從圖 2 知,設(shè)放電源的坐標(biāo)位置為 P( x,y,z) , 變壓器的長(zhǎng)、寬、高分別為m、 n、 h,變壓器箱殼上有六個(gè)傳感器,它們的坐標(biāo)分 別為 1P ( 0, 1y , 1z ) , 2P西安工程大學(xué) 本科 畢業(yè)設(shè)計(jì)(譯文) 14 ( 2x ,n, 2z ) , 3P ( 3x ,0, 3z ) , 4P ( m, 4y , 4z ) , 5P ( 5x , 5y ,0) , 0P ( 0x , 0y ,0),因此它們距放電源的位置分別為: 2 2 20 0 0( ) ( )S x x y y z? ? ? ? ? ( 1) 2 2 21 1 1( ) ( )S x y y z z? ? ? ? ? ( 2) 2 2 22 2 2( ) ( ) ( )S x x y n z z? ? ? ? ? ? ( 3) 2 2 23 3 3( ) ( )S x x y z z? ? ? ? ? ( 4) 2 2 24 4 4( ) ( ) ( )S x m y y z z? ? ? ? ? ? ( 5) 2 2 25 5 5( ) ( )S x x y y z? ? ? ? ? ( 6) 設(shè)放電 源 傳播到 0P 、 1P 、 2P 、 3P 、 4P 、 5P 的時(shí)間 分別 為 1t? , 2t? , 3t? , 4t? , 5t? ,6t? , v 為超聲波速度。檢測(cè)阻抗連接到測(cè)試的最后一層套管絕緣紙,然后鏈接到通過(guò)數(shù)據(jù)電纜測(cè)試儀。 39。 ① 變壓器建模和傳感器的位置 設(shè)定坐標(biāo)原點(diǎn)沿變壓器高壓側(cè)的槽的右下角。 西安工程大學(xué)畢業(yè)設(shè)計(jì)(譯文) 17 圖 5 變壓器傳感器的三維模型 ② 參數(shù)設(shè)置 超聲波檢測(cè)變壓器絕緣故障的參數(shù)設(shè)置有閾值、聲音速度、采樣率、過(guò)濾范圍等等。測(cè)試時(shí)有明顯的突然和高振幅聲發(fā)射信號(hào),超聲波信號(hào)幅度的分布是一個(gè)大范圍 ,最 大 振 幅是 2810dB。 變壓器主要參數(shù): 型號(hào): SFPSZ7120210/220 額定電壓:( 220177。因此,我們可以判斷, A相結(jié)合超聲定位是變壓器絕緣故障,可以檢測(cè)局部放電的位置。局部放電試驗(yàn)可以有效地檢測(cè)放電 量 ,但不能準(zhǔn)確定位。一個(gè)案例驗(yàn)證了超聲檢測(cè)的精度的電。 圖 8 電壓為 3mU 時(shí)的局部放電量 局部放電的數(shù)目達(dá)到 5010pC,當(dāng)測(cè)試電壓增加至 3mU 。所以,如果有變壓器絕緣局部放電,它應(yīng)該集中在變壓器 A相,局部放電數(shù)漫畫(huà)高座位附近可以通過(guò)局部放電試 驗(yàn)同時(shí)進(jìn)行測(cè)試。該測(cè)試使用多通道顯示,這有利于分析和比較找到變壓器的絕緣故障。有六個(gè)傳感器放置在變壓器的正和負(fù)的表面,四個(gè)傳感器放在兩側(cè),變壓器,和兩個(gè)傳感器放置在變壓器底部。為了防止 變壓器發(fā)生故障,電源伴侶停止變壓器,由李政超聲波檢測(cè)方法,評(píng)價(jià)其絕緣狀態(tài),并檢測(cè)可能的局部放電定位。 ③ 測(cè)試補(bǔ)償 考慮到 變頻電源單元和可能的共振的能力, 放電 反應(yīng)器用于在測(cè)試補(bǔ)償電容電流。我們使用多個(gè)傳感器 ,更多我們得到準(zhǔn)確的位置。檢測(cè)原理如圖 1 所示。局部放電試驗(yàn)可以有效地檢測(cè)放電 量 ,但不能準(zhǔn)確定位局部放電。下面用一個(gè)例子來(lái)驗(yàn)證這 種方法。2cQ Cu?? ( 12) Using the reactors to pensate for capacitive currents. During the voltage up to 20% and 50% 3mU , monitor pensation reactor and transformer current, and determine to increase or decrease the capacity of pensation reactor. Ⅲ . EXAMPLE OF ELECTICALULTRASONIC PD DETECTION 西安工程大學(xué) 本科 畢業(yè)設(shè)計(jì)(譯文) 6 Acetylene in oil of a 220kV substation 1 power transformer is excessive. Followup examination found that acetylene is still excessive, and there is a trend to further increase. Inner insulation of the transformer is likely to exist the phenomenon of partial discharge. To prevent transformer failure, the Power panion stop the transformer, evaluate its insulating state by the method of electicalultrasonic detection and detect possible partial discharge location. A. Ultrasonic Partial Discharge Field Testing During partial discharge test, ultrasonic PD field testing is carry out with DISP 24channel ultrasound PD detection system. (1) Transformer modeling and sensor placement Setting the origin of coordinates is the bottom right corner along the tank of transformer high voltage side. We can see from . Xaxis positive direction along the tank wall, the phase C direction toward the phase B. Yaxis direction is up and perpendicular to the tank bottom. Z axis is perpendicular to the tank wall from outside to inside.. The length of tested transformer is , its width is and its high is . Set up the transformer geometric model as X = , Y = and Z = . Transformer PD location coordinates the sensor R15I is used that have 18 channels, builtin ultrasonic pulse 40 db and preamplifier resonant frequency 150kHz. There are six sensors placed on the positive and negative surface of the transformer, four sensors placed on the two sides transformer, and t
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