中国电机工程学报2011，Vol.31Issue(19)：114-121,8.
局部放电作用下油浸绝缘纸的微观结构及电气性能
Microstructure and Electrical Performance of Oil-immersed Insulation Paper Under Partial Discharge
摘要
Abstract
Microstructure and relationship between microstructure and electrical performance were studied for oil-immersed insulation paper during partial discharge (PD) damage process. Material analysis apparatuses such as atomic force microscopy (AFM) and X-ray diffraction (XRD) instrument, combined with electrical apparatuses such as high-resistance meter, dielectric spectra instrument and cylinder-cylinder electrodes, were employed to investigate molecule chain structure, aggregation state structure, permittivity, dielectric loss factor, volume conductivity, and electrical strength for oil-immersed insulation paper during the damage process. The results reveal that: during PD damage process, crystalline regions of insulation paper suffer much severer damage from PD than amorphous regions; crystallinity exhibits an increasing trend and crystal grain orientation is enhanced, while crystal grain size, crystal type and two-phase-coexistent structure keep unchanged; the increase of crystallinity and the enhancement of crystal grain orientation cause permittivity, volume conductivity and dielectric loss factor to decrease, and electrical strength increase; the change in activity of molecules, ions and electrons, resulted from variations of crystallinity and orientation, is the important reason for the change in electrical performance.关键词
局部放电；油浸绝缘纸；损伤；分子链；聚集态；电气性能Key words
partial discharge (PD)/ oil-immersed insulation paper/ damage/ molecule chain/ aggregation state/electrical performance分类
信息技术与安全科学引用本文复制引用
严家明,廖瑞金,杨丽君,孙才新..局部放电作用下油浸绝缘纸的微观结构及电气性能[J].中国电机工程学报,2011,31(19):114-121,8.基金项目
国家重点基础研究发展计划项目(973项目)(2009CB724505-1)。 （973项目）
