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Effect of Radial Moisture Distribution on Frequency Domain Dielectric Response of Oil-Polymer Insulation Bushing
- Source :
- Polymers, Polymers, Vol 12, Iss 1219, p 1219 (2020), Volume 12, Issue 6
- Publication Year :
- 2020
- Publisher :
- MDPI, 2020.
-
Abstract
- In order to realize the diagnosis of water distribution, this paper analyzes the interface polarization and macroscopic space charge polarization mechanism when the water distribution is non-uniform. The experimental results of this paper and bushing show that when the moisture distribution is non-uniform, there is a significant loss peak in the tan&delta<br />f curve. The loss peak shifts to higher frequencies as the non-uniformity coefficient increases. There are common intersection points between multiple tan&delta<br />f curves. Further, this paper realizes the diagnosis of the location of moisture distribution through Frequency Domain Spectroscopy (FDS) testing of different voltages and different wiring methods based on the macroscopic space charge polarization. In the single-cycle FDS test, when the positive electrode is first added to the area with higher moisture content, the amplitude of the tan&delta<br />f curve is smaller. The tan&delta<br />f curves under different wiring methods constitute a &ldquo<br />ring-shaped&rdquo<br />loss peak. As the voltage increases, the peak value of the loss peak shifts to the lower frequency band. As the temperature increases, the peak value of the loss peak shifts to higher frequencies. Based on the above rules and mechanism analysis, this research provides a new solution for the evaluation of moisture content of oil-immersed polymers equipment.
- Subjects :
- Materials science
Polymers and Plastics
Frequency band
02 engineering and technology
01 natural sciences
Article
lcsh:QD241-441
lcsh:Organic chemistry
0103 physical sciences
0202 electrical engineering, electronic engineering, information engineering
space charge polarization
Composite material
Water content
oil-immersed polymer
Physics::Atmospheric and Oceanic Physics
moisture content
010302 applied physics
020208 electrical & electronic engineering
General Chemistry
Polarization (waves)
interface polarization
Amplitude
Bushing
Frequency domain
Electrode
Voltage
Subjects
Details
- Language :
- English
- ISSN :
- 20734360
- Volume :
- 12
- Issue :
- 6
- Database :
- OpenAIRE
- Journal :
- Polymers
- Accession number :
- edsair.doi.dedup.....5af8a15fc3f27b2afe72fc7cdae31071