變壓器故障檢測(cè)及保護(hù)技術(shù)
2.6萬(wàn)字 54頁(yè)


目 錄
摘要 3
緒論 6
第一章 變壓器常見(jiàn)故障及危害 8
1.1 短路故障 8
1.2 放電故障 8
1.3 絕緣故障 9
1.4 鐵心故障 11
1.5 分接開(kāi)關(guān)故障 11
第二章 變壓器故障診斷技術(shù)研究 13
2.1 離線檢測(cè)技術(shù)介紹 14
2.2 在線檢測(cè)技術(shù)介紹 15
2.3 DGA的經(jīng)典分析法 18
2.3.1 不同故障氣體組分 18
2.3.2 產(chǎn)氣速率 21
2.4 變壓器繞組的故障檢測(cè) 22
2.4.1 系統(tǒng)辨識(shí)原理 23
2.4.2 變壓器模型 23
2.4.3 實(shí)例分析 26
第三章 電力變壓器的保護(hù)技術(shù)的研究 28
3.1 瓦斯保護(hù)淺談 29
3.1.1 裝設(shè)范圍 29
3.1.2 工作原理 29
3.1.3 安裝方式 31
3.1.4 實(shí)驗(yàn)項(xiàng)目 32
3.1.5 運(yùn)行 33
3.1.6 瓦斯保護(hù)信號(hào)動(dòng)作的主要原因 33
3.1.7 瓦斯保護(hù)裝置動(dòng)作的處理 34
3.2 縱聯(lián)差動(dòng)保護(hù)技術(shù)研究 35
3.2.1 裝設(shè)范圍 35
3.2.2 保護(hù)原理 35
3.2.3 差動(dòng)保護(hù)中存在的問(wèn)題及解決方法： 38
3.3 新差動(dòng)保護(hù)技術(shù)研究 41
3.3.1 新差動(dòng)保護(hù)判據(jù) 41
3.3.2 阻抗繼電器 43
3.3.3 差動(dòng)保護(hù)于阻抗保護(hù)的配合 43
3.3.4 仿真分析 44
3.4 零序電流保護(hù)研究 48
3.4.1變電所單臺(tái)變壓器的零序電流保護(hù) 48
3.4.2 變電所多臺(tái)變壓器的零序電流保護(hù) 49
結(jié)論………………………………………………………………………….. 52
致謝…………………………………………………………………………...53
參考文獻(xiàn)…………………………………………………………………….. 54


摘要
變壓器故障診斷一般采用油中溶解氣體色譜分析法（DGA）。本文嘗試用參數(shù)辨識(shí)的方法進(jìn)行變壓器三相電氣量的在線監(jiān)測(cè)，依據(jù)變壓器繞組結(jié)構(gòu)及參數(shù)在故障前后會(huì)改變的原理，用參數(shù)辨識(shí)的方法，進(jìn)行故障及其部位的識(shí)別，實(shí)現(xiàn)故障局部定位，提高變壓器狀態(tài)監(jiān)測(cè)和診斷的準(zhǔn)確性。
變壓器保護(hù)主要有瓦斯保護(hù)和縱聯(lián)差動(dòng)保護(hù)，縱差動(dòng)是變壓器必須采用的保護(hù)原理，可以反映變壓器的各種內(nèi)部相間和接地故障。本文提出了一種不受空投時(shí)勵(lì)磁涌流影響的新方法，用阻抗繼電器反應(yīng)空投于內(nèi)部故障，這種保護(hù)配置方式在內(nèi)部故障時(shí)有很高的靈敏度，在外部故障時(shí)又有很強(qiáng)的制動(dòng)作用，不反映空投時(shí)的勵(lì)磁涌流，卻能反映變壓器空載合閘時(shí)有故障的情況，解決了變壓器差動(dòng)保護(hù)的難題。

關(guān)鍵詞: 電力變壓器 、在線檢測(cè)、DGA經(jīng)典分析、瓦斯保護(hù)、差動(dòng)保護(hù)



ABSTRACT
The electric power transformer breaks down the diagnosis aspect, mainly introducing the on-line examination:The DGA classic analytical method and transformers round the new method of a breakdown diagnosis, the DGA is namely to fuse the air color table analysis method in the oil, can monitor the transformer to insulate the appearance effectively, discovering the breakdown of its internal delitescence and it develops the degree, round a diagnosis, the main trial recognizes with the parameter of method carry on the transformer three mutually the on-line monitor of the electricity quantity, according to the transformer round a structure and parameters at break down and will change in front and back of principle, with the parameter recognize of method, carry on break down and its part identify, carrying out to break down the partial fixed position, the exaltation transformer appearance monitor and diagnostic accuracy;The transformer protection mainly introduces the gas protection and differs to move the protection, differing to move protection is the protection principle that the transformer must adopt, can reflect various inner part of the transformer alternate and connect a ground of breakdown, in the text not only introduced the traditional protection method, but also put forward a kind of be free from to air-drop the magnetizing inrush out to flow the influence of new method, use the resistance after the electric appliances respond to air-drop in the inner part break down, this kind of protection install the way interiorly break down have the very high and intelligent degree, at the exterior break down again have very strongly make the action to use, don't reflect the magnetizing inrush of air-drop the hour to flow out to flow, but can reflect the transformer get empty to carry to match the switch have the breakdown of circumstance, solved the transformer to differ the hard nut to crack of move the protection。

Keyword:The electric power transformer, on-line examination, the DGA classic analyze, the gas protect, differs to move the protection


參考文獻(xiàn)
《電力變壓器故障與診斷》 董其國(guó) 中國(guó)電力出版社
《電力變壓器故障與檢測(cè)》 王曉鶯 機(jī)械出版社