變壓器故障檢測及保護技術(shù)
2.6萬字 54頁


目 錄
摘要 3
緒論 6
第一章 變壓器常見故障及危害 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 離線檢測技術(shù)介紹 14
2.2 在線檢測技術(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 22
2.4.1 系統(tǒng)辨識原理 23
2.4.2 變壓器模型 23
2.4.3 實例分析 26
第三章 電力變壓器的保護技術(shù)的研究 28
3.1 瓦斯保護淺談 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 實驗項目 32
3.1.5 運行 33
3.1.6 瓦斯保護信號動作的主要原因 33
3.1.7 瓦斯保護裝置動作的處理 34
3.2 縱聯(lián)差動保護技術(shù)研究 35
3.2.1 裝設(shè)范圍 35
3.2.2 保護原理 35
3.2.3 差動保護中存在的問題及解決方法： 38
3.3 新差動保護技術(shù)研究 41
3.3.1 新差動保護判據(jù) 41
3.3.2 阻抗繼電器 43
3.3.3 差動保護于阻抗保護的配合 43
3.3.4 仿真分析 44
3.4 零序電流保護研究 48
3.4.1變電所單臺變壓器的零序電流保護 48
3.4.2 變電所多臺變壓器的零序電流保護 49
結(jié)論………………………………………………………………………….. 52
致謝…………………………………………………………………………...53
參考文獻…………………………………………………………………….. 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)辨識的方法進行變壓器三相電氣量的在線監(jiān)測，依據(jù)變壓器繞組結(jié)構(gòu)及參數(shù)在故障前后會改變的原理，用參數(shù)辨識的方法，進行故障及其部位的識別，實現(xiàn)故障局部定位，提高變壓器狀態(tài)監(jiān)測和診斷的準確性。
變壓器保護主要有瓦斯保護和縱聯(lián)差動保護，縱差動是變壓器必須采用的保護原理，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勵磁涌流影響的新方法，用阻抗繼電器反應空投于內(nèi)部故障，這種保護配置方式在內(nèi)部故障時有很高的靈敏度，在外部故障時又有很強的制動作用，不反映空投時的勵磁涌流，卻能反映變壓器空載合閘時有故障的情況，解決了變壓器差動保護的難題。

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



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
《電力變壓器故障與診斷》 董其國 中國電力出版社
《電力變壓器故障與檢測》 王曉鶯 機械出版社