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Breakdown characteristics of transformer oil with cellulose particles in a non-uniform field under lightning impulse voltage
- Source :
- IEEE Transactions on Dielectrics and Electrical Insulation. 27:1627-1635
- Publication Year :
- 2020
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2020.
-
Abstract
- This study presents experimental results on the influence of cellulose particles on the breakdown characteristics of transformer oil in a highly non-uniform field under lightning impulse voltage. The experimental results show that as the particle content increases, the breakdown voltage reduces with little change in the breakdown time lag. At the same cellulose particle content, the oil breakdown voltage under oscillating lightning impulse (OLI) is lower than that under standard lightning impulse (SLI) and the breakdown time lag under OLI is longer than that under SLI. The impulse wave oscillation has a large effect on the accumulation of particles around the high voltage electrode and cellulose particles affect the development of the streamer process. At mid to high particle content the accumulation of particles around the high voltage electrode causes a decrease in the conductivity of the surrounding oil. This work contributes to the understanding of the effect of cellulose particles in oil and breakdown and on oscillating waveforms and provides guidance for lightning impulse tests on oil-immersed power transformers in the field.
- Subjects :
- 010302 applied physics
Materials science
Oscillation
Transformer oil
Impulse (physics)
Conductivity
01 natural sciences
chemistry.chemical_compound
chemistry
0103 physical sciences
Lightning impulse voltage
Breakdown voltage
Waveform
Electrical and Electronic Engineering
Cellulose
Composite material
Subjects
Details
- ISSN :
- 15584135 and 10709878
- Volume :
- 27
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Dielectrics and Electrical Insulation
- Accession number :
- edsair.doi...........62a0d2c9c3a03a54b3cb4693604ef165