絕緣紙板沿面爬電過程中“白斑”的生長

論文編號:ZD1428  論文字數:12154,頁數:31

論文題目：絕緣紙板沿面爬電過程中“白斑”生長特性研究

摘 要

 由于沿面爬電是電力變壓器最危險的絕緣故障，如任其發展，將會導致重瓦斯動作甚至變壓器箱體開裂等惡性變壓器事故，危害極大。“白斑”是絕緣紙板沿面爬電過程中重要現象，為研究絕緣紙板沿面爬電過程中“白斑”的生長特性，建立了試驗研究平臺，包括試驗變壓器，試驗油箱，球板電極，油循環系統，單反相機及油中溶解氣體分析儀，測量了不同老化程度紙板沿面爬電過程中“白斑”以及油中溶解氣體的含量，統計了“白斑”的長度，角度及面積變化規律。研究結果表明，老化程度越高的紙板在爬電后期其紙板表面產生的氣泡簇明顯較老化程度低的紙板及未老化的紙板更加密集，氣泡簇也更粗；紙板的耐爬電時間的平均值基本在42到43分鐘左右，但在同樣的爬電時間內，爬電長度隨老化程度而增大；紙板的最終白斑總面積基本一樣，但老化程度高的紙板其白斑在爬電前期的生長速率要快于老化程度低的紙板；爬電產生的氫氣產量，隨老化程度的增加而減少，產生的乙炔和總烴量值受老化程度的影響不顯著。
 
關鍵詞：沿面爬電，白斑，油中溶解氣體

論文類型：應用研究

Title: Insulating board the creepage" white spot" in the process of the research on growth characteristics of
ABSTRACT
 As a result of the creepage is most dangerous for insulation fault of power transformer, such as the development, will lead to heavy gas action even transformer tank cracking and other malignant transformer accident, great harm. " White spot" is the insulating board the creepage process important phenomenon of insulating board, the creepage of" white spot " growth characteristics, to establish a experiment platform, including a test transformer, test tank, ball plate electrode, oil circulation system, camera and dissolved gas analyzer, measurement of different degrees of aging board the creepage of" white" and dissolved gas content, statistics of the" white" length, angle and area change rule. The results show that the aging degree, higher board in the board surface creepage later produced bubble clusters were significantly more degree of aging lower board and not aging board more intensive, bubble clusters are also more crude; cardboard high creepage time average of42 to43 minutes, but in the same climb electric time, creepage length increases with aging degree; cardboard final white area is basically the same, but the degree of aging high board the leukoplakia in creepage early growth rate faster than the degree of aging lower paperboard; creepage generated hydrogen yield, with aging degree increases, producing acetylene and total hydrocarbon values by the aging degree of influence.

Key words: the creepage, leukoplakia, dissolved gas in oil

Type of thesis: Application Research

目 錄
摘要 I
1 緒論 1
1.1  選題背景和意義 1
1.2  國內外研究現狀 1
1.3  本文主要研究內容及預期目標 3
2 實驗平臺的建立 4
2.1 工頻加壓系統 4
2.2  微水測量儀，濾油機和真空注油設備 5
2.3  沿面放電模型 6
2.4 局部放電檢測系統 6
2.4.1常規脈沖電流檢測系統 7
2.4.2 特高頻（UHF）檢測系統 7
2.5油色譜分析系統 7
2.6圖像，視頻采集方式和數據采集系統 7
3 沿面爬電時白斑的發展情況的分析 9
3.1白斑的處理方法 9
3.2白斑的具體生長情況統計 9
3.3  A、B、C三組紙板沿面爬電時氣泡簇的發展規律 16
3.4最終爬電長度(擊穿點)對比分析 17
3.5機理淺析 17
4 沿面爬電過程中生成的氣體的分析 19
4.1沿面爬電的不同時刻生成的氫氣、乙炔、總烴的對比 19
4.2  沿面爬電的不同時刻乙炔和總烴的產氣率對比 21
5 結論 24
致謝 25
參考文獻 26