Title :
Measurement of moisture diffusion as a function of temperature and moisture concentration in transformer pressboard
Author :
Du, Y. ; Mamishev, A.V. ; Lesieutre, Bernard C. ; Zahn, M.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., MIT, Cambridge, MA, USA
Abstract :
The moisture diffusion process is measured for oil-free transformer pressboard using a flexible interdigital dielectrometry three-wavelength sensor. Experiments are performed for five different temperatures at various moisture levels. The diffusion coefficient as a function of temperature and moisture concentration is estimated and compared with literature values. The numerical methods of solving the diffusion equation are discussed
Keywords :
diffusion; insulation testing; moisture; transformer insulation; interdigital frequency-wavenumber dielectrometry; moisture diffusion measurement; three-wavelength sensor; transformer pressboard; Boundary conditions; Diffusion processes; Frequency; Humidity; Moisture measurement; Numerical models; Radio access networks; Temperature sensors; Testing; Wavelength measurement;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1998. Annual Report. Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5035-9
DOI :
10.1109/CEIDP.1998.734013
