环氧浸纸绝缘材料内部的绝缘纸易吸附空气中的水分，因而导致材料的电气性能下降。采用超声方法检测环氧浸纸材料中的水含量。研究不同水含量下环氧浸纸材料的介电性能。结果表明：电阻率随着水含量的增加而减小，介质损耗随着水含量的增加而增大；超声波在材料中波速的变化可以反映材料中水含量的高低，波速随着水含量的增加而变大。
The insulating paper inside the epoxy resin impregnated paper insulation material can easily ab-sorb moisture in the air, then resulting in the decrease of electrical properties. The dielectric properties of the epoxy resin impregnated paper materials with different water content were studied, and their water content was tested by ultrasonic method. The results show that with the increase of water content, the re-sistivity decreases, and the dielectric loss increases. The change of ultrasonic velocity in the material can reflect the amount of water content. The velocity becomes faster with the increase of water content.
参考文献
| [1] | 欧阳星,郭宝春,贾德民,罗远芳,傅伟文.新型环氧树脂/蒙脱土纳米复合材料的制备、结构和性能[J].绝缘材料,2004(06):1-3,7. |
| [2] | 王旗,李喆,尹毅,吴建东.微/纳米氧化铝/环氧树脂复合材料热导率和击穿强度的研究[J].绝缘材料,2013(02):49-52. |
| [3] | 周洪青,李仰平.高频下纳米二氧化硅 /环氧树脂复合材料的介电特性研究[J].绝缘材料,2004(03):20-21,25. |
| [4] | 杨淑蕙.植物纤维化学[M].北京:中国轻工业出版社,2001 |
| [5] | Radosavljevi?R;Bojkovi?A;Popovi?A M et al.Determi-nation of Insulation Ageing and Operating Life Remainder of Transformers in Hydroelectric Power Plant ?erdap I as a Factor Affecting the Increase of Their Rating[J].Elektro-privreda,2005,58(03):13-24. |
| [6] | Zaengl W S .Dielectric Spectroscopy in Time and Frequen-cy Domain for HV Power Equipment I:Theoretical Consid-erations[J].IEEE ELECTRICAL INSULATION MAGAZINE,2003,19(05):5-19. |
| [7] | Ekanayake C .Diagnosis of Moisture in Transformer Insula-tion-application of Frequency Domain Spectroscopy[D].Swe-den:Chalmers University of Technology,2006. |
| [8] | 冯若.超声手册[M].南京:南京大学出版社,1999 |
| [9] | F. Aymerich;S. Meili .Ultrasonic evaluation of matrix damage in impacted composite laminates[J].Composites, Part B. Engineering,2000(1):1-6. |
| [10] | Richardson MOW;Wisheart M .Low velocity response of a complex geometry pultruded glass /polyester composite[J].Journal of Materials Science,1999(5):1107-1116. |
| [11] | 蔡成良,涂明,罗功银.220kV变电站管形母线落地事故分析[J].电网技术,1999(04):68-69. |
| [12] | 郝艳捧,闫波,王国利,谢恒堃,高乃奎.基于超声脉冲反射法评估大电机定子绝缘的老化状态[J].中国电机工程学报,2003(04):91-95. |
| [13] | 郝艳捧,谢恒堃,王国利,高乃奎.用超声波波速评估大电机主绝缘的剩余运行年数[J].中国电机工程学报,2005(04):76-82. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%