绝缘纸板沿面爬电过程中“白斑”的生长

论文编号:ZD1428  论文字数:12154,页数:31

论文题目：绝缘纸板沿面爬电过程中“白斑”生长特性研究

摘 要

 由于沿面爬电是电力变压器最危险的绝缘故障，如任其发展，将会导致重瓦斯动作甚至变压器箱体开裂等恶性变压器事故，危害极大。“白斑”是绝缘纸板沿面爬电过程中重要现象，为研究绝缘纸板沿面爬电过程中“白斑”的生长特性，建立了试验研究平台，包括试验变压器，试验油箱，球板电极，油循环系统，单反相机及油中溶解气体分析仪，测量了不同老化程度纸板沿面爬电过程中“白斑”以及油中溶解气体的含量，统计了“白斑”的长度，角度及面积变化规律。研究结果表明，老化程度越高的纸板在爬电后期其纸板表面产生的气泡簇明显较老化程度低的纸板及未老化的纸板更加密集，气泡簇也更粗；纸板的耐爬电时间的平均值基本在42到43分钟左右，但在同样的爬电时间内，爬电长度随老化程度而增大；纸板的最终白斑总面积基本一样，但老化程度高的纸板其白斑在爬电前期的生长速率要快于老化程度低的纸板；爬电产生的氢气产量，随老化程度的增加而减少，产生的乙炔和总烃量值受老化程度的影响不显著。
 
关键词：沿面爬电，白斑，油中溶解气体

论文类型：应用研究

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 录
摘要 I
1 绪论 1
1.1  选题背景和意义 1
1.2  国内外研究现状 1
1.3  本文主要研究内容及预期目标 3
2 实验平台的建立 4
2.1 工频加压系统 4
2.2  微水测量仪，滤油机和真空注油设备 5
2.3  沿面放电模型 6
2.4 局部放电检测系统 6
2.4.1常规脉冲电流检测系统 7
2.4.2 特高频（UHF）检测系统 7
2.5油色谱分析系统 7
2.6图像，视频采集方式和数据采集系统 7
3 沿面爬电时白斑的发展情况的分析 9
3.1白斑的处理方法 9
3.2白斑的具体生长情况统计 9
3.3  A、B、C三组纸板沿面爬电时气泡簇的发展规律 16
3.4最终爬电长度(击穿点)对比分析 17
3.5机理浅析 17
4 沿面爬电过程中生成的气体的分析 19
4.1沿面爬电的不同时刻生成的氢气、乙炔、总烃的对比 19
4.2  沿面爬电的不同时刻乙炔和总烃的产气率对比 21
5 结论 24
致谢 25
参考文献 26