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南澳電氣NAJFXD局部放電超聲自動(dòng)定位系統(tǒng)

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南澳電氣NAJFXD局部放電超聲自動(dòng)定位系統(tǒng) NAJFXD automatic PD discharge positioning system 長(zhǎng)期以來(lái)，運(yùn)作中大型變壓器的故障檢測(cè)及定位始終是電氣工程師們關(guān)注的焦點(diǎn)問(wèn)題。國(guó)家“七五”重點(diǎn)科技攻關(guān)項(xiàng)目“大型變壓器局部放電超聲定位方法及裝置的研究“課題中研制的為解決這一問(wèn)題提供了有效手段。先后在葛州壩500kV開(kāi)關(guān)站、武漢鳳凰山500kV變電站、上海變壓器廠、合肥變壓器廠、衡陽(yáng)變壓器廠、廣州供電局、武漢供電局、湖南電力局、重慶變壓器廠、武鋼等處對(duì)數(shù)百臺(tái)變壓器，電抗器進(jìn)行局部放電超聲測(cè)量。該系統(tǒng)工作可靠、操作方便，滿足測(cè)量要求。作為電力部“八五”重點(diǎn)推廣項(xiàng)目之一，目前該電裝置已廣泛應(yīng)用于東北、華中、華東、華北和西北等有關(guān)單位的電力測(cè)試研究及現(xiàn)場(chǎng)測(cè)量。南澳電氣NAJFXD局部放電超聲自動(dòng)定位系統(tǒng)集高性能計(jì)算機(jī)、高靈敏度局放聲測(cè)探頭、程控放大濾波、高速A/D轉(zhuǎn)換器、瞬態(tài)波形記錄、信號(hào)分析、故障定位計(jì)算機(jī)軟件于一體，適用于大型變壓器和充油高電壓電器設(shè)備以及GIS和其他電力運(yùn)行設(shè)備中局部放電超聲信號(hào)的采集、測(cè)量、分析和定位以及在線監(jiān)測(cè)。對(duì)通常產(chǎn)生的變壓器圍屏、引線、金屬件及高壓線圈表面的放電能迅速判明故障位置。定位誤差小于250mm，整套測(cè)量系統(tǒng)能檢測(cè)出小于1000pC局部放電量的超聲信號(hào)。功能與特點(diǎn)： 1、基于Windows平臺(tái)下的軟件，使局部放電超聲波探測(cè)的操作、分析更簡(jiǎn)捷。 2、超聲波傳感器具有低噪聲、高靈敏度和抗干擾性能，使信號(hào)的獲取更可靠。 3、南澳電氣NAJFXD局部放電超聲自動(dòng)定位系統(tǒng)具有局部放電超聲波信號(hào)的電-聲定位和聲-聲定位功能，使現(xiàn)場(chǎng)測(cè)量更靈活。 4、任意選擇超聲波信號(hào)的球面定位計(jì)算或雙曲面定位計(jì)算，使定位結(jié)果更精確。 5、用立體幾何圖形展現(xiàn)超聲波探頭和定位點(diǎn)的坐標(biāo)位置。 6、方便建立測(cè)量和定位的數(shù)據(jù)庫(kù)，便于進(jìn)一步分析和管理。 7、南澳電氣NAJFXD局部放電超聲自動(dòng)定位系統(tǒng)還可以作為局部放電在線監(jiān)測(cè)儀使用，可監(jiān)測(cè)電力設(shè)備的局放產(chǎn)生和發(fā)生發(fā)展。技術(shù)參數(shù)：超聲探頭靈敏度：-150dB 輸入通道數(shù)：2/6/8 A/D轉(zhuǎn)換精度：8bit±1/2LSB 采樣長(zhǎng)度：32k/通道最小可測(cè)放電量：＜50pC(實(shí)驗(yàn)室）＜300(1000)pC（現(xiàn)場(chǎng)）最小定位誤差：＜50mm(實(shí)驗(yàn)室)＜ 250mm（現(xiàn)場(chǎng)） NAJFXD Type Local Discharge Ultrasonic Automatic Positioning Device The failure testing and positioning of operating the medium and large sized transformers have always been the points that electrical engineers focus for a long time. The NAJFXD system, manufactured in the large-sized transformer local discharge ultrasonic position method and equipment research subject which is one of the national key scientific and technological project has provided an effective solution. The NAJFXD system has carried the ultrasonic measurement to the local discharge of the hundreds of transformers and reactor in Gezhou Dam 500kV switch station, Wuhan Phoenix Mountain 500kV transformer substation, Shanghai transformer factory, Hefei transformer factory, Hengyang transformer factory, Guangzhou power supply bureau, Hunan electricity generating board, Chongqing transformers factory and Wuhan steel. This system has the advantage of operation reliable and easy to operate. It can meet the needs of measurement. As one of the key items of the of eight-five project, this electrical device has been widely used for the spot test and research in the related unit in the north, east, central and northwest parts of China. The NAJFXD ultrasonic positioning system which is including the high performance computer, high-sensitivity local discharge sound probe, programmed amplified filter, high-speed A/D transducer, transient waveform recording, signal analysis and fault location software is applied for acquiring, measuring, analyzing, positioning and spot observing the local discharge ultrasonic signal in the large-sized transformer, oil-immersed high voltage electrical apparatus and the GIS electrical operation equipment. The NAJFXD ultrasonic positioning system can position the fault and the error is less than 250mm. The whole measuring system can find out the local discharge ultrasonic signal which is less than 1000pC. Functions and characteristics: (1) Making the detecting operation of local discharge ultrasonic more convenient and the analyzing more simple under the platform of the windows. (2) Making the signal acquired more reliably for the ultrasonic sensor has the performance of low noise, high-sensitivity and anti-jamming. (3) Making the spot testing more flexible with the local discharge ultrasonic signal electrical-acoustical position and acoustical-acoustical position functions (4) Making the result of the position more precisely by choosing freely the spherical position calculation and the hyperboloid position calculation of the ultrasonic signal. (5) Showing the position coordinates by ultrasonic probe and the locating point by solid geometric drawing. (6) Convenient for building the measuring and positioning database for further analyzing and managing. (7) Be the local discharge on-line detecting instrument which is useful for detecting the local generating and developing. Technical parameter: The sensitivity of the ultrasonic probe: -150dB A/D conversion accuracy: 8bit±1/2LSB Sample length: 32k/channel Minimum detectable discharge:＜50pC (laboratory)＜300(1000)pC (spot) Minimum positional error:＜50mm(laboratory)＜ 250mm (spot)

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