Title :
Thermal Aging Studies on Cellulose Insulation Paper of Power Transformer Using AFM
Author :
Ruijin, Liao ; Chao, Tang ; Lijun, Yang ; Huanchao, Chen
Author_Institution :
Key Lab. of High Voltage Eng. & Electr. New Technol., Chongqing Univ.
Abstract :
The life span of the transformer is mainly decided by its solid insulation, especially insulation paper (pressboard). In order to analyze the ageing mechanism of power transformer insulation paper, we use the atomic force microscope (AFM), which is one of the important instruments in nanometer area to observe the surface of thermal aging insulation paper. Through the comparison of some specimens´ AFM figures, we discovered that the molecular arrangement of the initial cellulose paper is close and ordered, some of the hexagonal mesh structures of the D-glucopyranose units were broken down after a few weeks accelerated thermal aging. Then we analyzed the micro mechanism of the aging process and the influence to the insulation paper caused by thermal aging. Some methods to improve the dielectric properties of insulation paper are also included
Keywords :
ageing; atomic force microscopy; dielectric properties; insulation testing; life testing; paper; power transformer insulation; power transformer testing; AFM; D-glucopyranose structures; accelerated thermal aging; atomic force microscope; cellulose insulation paper; dielectric properties; life span; molecular arrangement; power transformer; pressboard; solid insulation; Accelerated aging; Atomic force microscopy; Dielectrics and electrical insulation; Oil insulation; Paper technology; Petroleum; Power transformer insulation; Power transformers; Robust stability; Thermal force; AFM; Cellulose Paper; Power Transformer; Thermal Aging;
Conference_Titel :
Properties and applications of Dielectric Materials, 2006. 8th International Conference on
Conference_Location :
Bali
Print_ISBN :
1-4244-0189-5
Electronic_ISBN :
1-4244-0190-9
DOI :
10.1109/ICPADM.2006.284279
