为研究水分和酸对油纸绝缘老化的协同加速作用，将不同初始含水量的绝缘纸和不同初始含酸量的绝缘油组成的油纸绝缘在110℃下进行加速热老化试验，并对其老化后绝缘纸的聚合度进行测试分析。结果表明：随着水分和酸初始含量的增加，油纸绝缘的初始降解速率和老化各阶段的平均降解速率均增加。单独增加油纸复合绝缘中的水分或酸含量时，绝缘纸在各个老化时间段的平均降解速率增加不明显。当油纸复合绝缘中的水分和酸的含量同时增加时，则绝缘纸在各个老化时间段的平均降解速率增加显著。酸添加量相同时，分子量越小的酸对绝缘纸的加速老化作用越明显。
To study the collaborative acceleration effect of moisture and acid on the ageing of oil-paper insulation, we carried out the accelerating thermal ageing experiment for the oil-paper insulation com-posed of the insulating paper with different initial moisture content and the insulating oil with different initial acid content, and the degree of polymerization(DP) of the insulating paper after thermal ageing was tested and analyzed. The results show that with the increase of the initial moisture and acid content, the initial degradation rate and the average degradation rate of the oil-paper insulation at different ageing stages increase. When the moisture content or the acid content increases only, the increase of average deg-radation rate at different ageing stages is not obvious. When the moisture and acid content increase to-gether, the increase of average degradation rate of the insulation paper at different ageing stages is signifi-cant. With the same acid addition, the accelerating ageing effect of the acid with smaller molecular weight on the insulating paper is more significant.
参考文献
| [1] | 廖瑞金,桑福敏,刘刚,杨丽君.变压器不同油纸绝缘组合加速老化时油中水分和酸值含量研究[J].中国电机工程学报,2010(04):125-131. |
| [2] | 刘玉仙.变压器油纸绝缘的含湿分析及其对运行安全的影响[J].变压器,2002(05):1-6. |
| [3] | 吕玮,吴广宁,周利军,刘君,王韬.基于频率响应油纸绝缘系统微水状态研究[J].绝缘材料,2011(02):67-70. |
| [4] | 刘玉仙.油纸绝缘变压器中水分的聚积及其对热老化寿命的影响[J].变压器,2004(02):8-13. |
| [5] | 刘敏.不同含水量对油纸绝缘老化速率的影响[J].绝缘材料,2008(03):40-42. |
| [6] | 申翰林,周超,彭卫东.酸在变压器油纸绝缘中的扩散和溶解特性研究[J].绝缘材料,2013(05):62-65. |
| [7] | 隋彬,李延涛,吴广宁,李先浪,卢剑,李伟.水分和氧气对油纸绝缘老化的影响[J].绝缘材料,2013(04):43-47. |
| [8] | Fabre J, Pichon A. Deterioating Processes and Products of Paper in Oil Application to Transformers[C]//Proceedings of CIGRE Conference,Paris,France,1960.,1960. |
| [9] | Lundgaard L E, Hansen W, Linhjell D, et al . Aging of Oil-impregnated Paper in Power Transformers[J].IEEE Transactions on Power Delivery,2004,19(1):230-239.,2004. |
| [10] | Lundgaard L E, Hansen W, Ingebrigtsen S, et al. Aging of Kraft Paper by Acid Catalyzed Hydrolysis[C]//2005 IEEE International Conference on Dielectric Liquids, IEEE, 2005:381-384.,2005. |
| [11] | 朱孟兆,廖瑞金,周欣,杨丽君,孙才新.油介质中水合氢离子扩散的分子动力学模拟[J].高电压技术,2011(08):1930-1936. |
| [12] | Noirhomme B, Lessard M C, Jalbert J, et al. Influence of Transformer Oil Acidity on Insulating Paper Degradation [C]//IEEE Electrical Insulation Conference,2013:392-396.,2013. |
| [13] | 高洁,汤烈贵. 纤维素科学[M]. 北京:科学出版社,1996.,1996. |
| [14] | Emsley A M . The Kinetics and Mechanisms of Degrada-tion of Cellulosic Insulation in Power Transformers[J].Polymer Degradation and Stability,1994,44(3):343-349.,1994. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%