Back to Search
Start Over
The mathematical model of dissipation factor with temperature–frequency effect for oil-impregnated paper bushings
- Source :
- AIP Advances, Vol 10, Iss 11, Pp 115112-115112-6 (2020)
- Publication Year :
- 2020
- Publisher :
- AIP Publishing LLC, 2020.
-
Abstract
- The accuracy of insulation defect diagnosis based on the dielectric spectrum response is severely influenced by temperature for oil-impregnated paper bushing. The dielectric loss (tan δ) mathematical model with a temperature–frequency factor to restrict the application of the frequency domain dielectric spectrum (FDS) for insulation diagnosis is not clear. In this paper, five temperatures are selected to study the frequency temperature characteristic of the FDS and polarization current for oil-impregnated paper bushing. The experimental results show that the temperature has different effects on the lower frequency (0.001 Hz–1 Hz) and higher frequency (1000 Hz–10 kHz) of FDS. With the increasing temperature, the lower frequency tan δ of 1 mHz–1 Hz shows a better pattern of exponential growth, while the higher frequency tan δ at 1 kHz–10 kHz shows the declining law with the rising temperature. With the increasing temperature, the polarization current shows a better pattern of exponential growth, while resistance obviously shows the declining law of the exponential pattern. The FDS curve of oil-impregnated paper bushings can be amended by the mathematical model of tan δ for the dielectric response on site for accuracy diagnosis.
- Subjects :
- 010302 applied physics
Materials science
General Physics and Astronomy
Frequency effect
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
lcsh:QC1-999
Exponential function
Exponential growth
Bushing
Frequency domain
0103 physical sciences
Dissipation factor
Dielectric loss
Composite material
0210 nano-technology
Polarization (electrochemistry)
lcsh:Physics
Subjects
Details
- Language :
- English
- ISSN :
- 21583226
- Volume :
- 10
- Issue :
- 11
- Database :
- OpenAIRE
- Journal :
- AIP Advances
- Accession number :
- edsair.doi.dedup.....3ebc5cd0a8ec9c8ec5e10b42e4841b57