山东电力技术2017，Vol.44Issue(6)：8-16,9.
绝缘纸热裂解初期微观机理研究
Microscopic Mechanism on the Incipient Pyrolysis of Insulation Paper
王学磊 1王硕 1朱文兵 1周加斌 1许伟1
作者信息
- 1. 国网山东省电力公司电力科学研究院,山东 济南 250003
- 折叠
摘要
Abstract
By investigating the microscopic pyrolysis mechanism of the insulation paper,especially on the incipient pyrolysis stage,it can reveal potential guiding values,such as further understanding on the pyrolysis process in internal insulation system of a transformer undergoing overheating defects and early evaluations of insulation deterioration and life expectancy.To this end,the way of experiment combined with simulation was adopted in this article.Firstly,the GC/MS experiment on cellulose under 350～900 ℃ was conducted,and it is found that allose was the product of the highest ration and it is also the most important product for diagnosing the degree of deterioration on the incipient stage.For further clarification of the formation mechanism and the following rules of the pyrolysis of allose,the high temperature reactive molecular dynamics simulation for the pyrolysis of cellobiose which is the constitutional unit of the paper cellulose was investigated and discussed in this article.By tracking the visual decomposition process of the cellulose and observing the splitting and forming rules of the bonds at different time,it is found that allose was generated by the split of C'4-O glucosidic bond and C1-O5 bond at the 1-pyranoid ring.The small molecules generated during pyrolysis are measured by velocitron and can be used as micro-features in diagnosing thermal faults of the power transformers.关键词
绝缘纸/初始裂解/反应分子动力学/微观机理/阿洛糖Key words
insulation paper/incipient pyrolysis/reactive molecular dynamics/microscopic mechanism/allose分类
信息技术与安全科学引用本文复制引用
王学磊,王硕,朱文兵,周加斌,许伟..绝缘纸热裂解初期微观机理研究[J].山东电力技术,2017,44(6):8-16,9.
