Optimization of Insulators for Gas Insulated Systems

Cronin, J. C.; Perry, E. R.

doi:10.1109/tpas.1973.293757

Cited by 23 publications

(2 citation statements)

References 8 publications

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“…Under clean conditions the corrugations can reduce the flashover voltage [1,39]. Under contaminated conditions they have been reported both to increase the flashover voltage and to have no effect [39,[52][53][54].…”

Section: Cast Epoxy Insulatorsmentioning

confidence: 99%

Review of high-voltage gas breakdown and insulators in compressed gas

Cookson

1981

IEE Proc. A Phys. Sci. Meas. Instrum. Manage. Educ. Rev. UK

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In the past ten years there have been significant advances in the theoretical and experimental analysis of high-voltage gas breakdown and surface flashover of insulators in compressed gases. This has probably been fostered by the recent growth in the design and application of gas-insulated high-voltage equipment. The review describes the characteristics of compressed-gas breakdown, including the effects of failure of Paschen's law; conditioning; electrode area; material and surface; breakdown-voltage distribution; particle contamination; voltage waveform; temperature; and gas mixtures. The insulator-flashover characteristics are then described, including the effects of insulator-electrode interface; insulator material; insulator shape; voltage waveform; charge generation; particle contamination; surface contamination; conditioning; flashover distribution; and dependence on type of gas. The various mechanisms proposed for gas breakdown and insulator flashover are reviewed and discussed in relation to the experimental characteristics. Future theoretical and experimental work is suggested to clarify the gas-breakdown and insulator-flashover mechanisms, and which would also help bring about the design of improved high-voltage gas-insulated systems.

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Section: Cast Epoxy Insulatorsmentioning

confidence: 99%

Review of high-voltage gas breakdown and insulators in compressed gas

Cookson

1981

IEE Proc. A Phys. Sci. Meas. Instrum. Manage. Educ. Rev. UK

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“…Cronin and Perry [5] reviewed the performance of various shapes of insulators like smooth disc, corrugated disc and a cone. Insulator contamination leads to weakening of dielectric strength.…”

Section: Introductionmentioning

confidence: 99%

Minimisation of electric field stress at triple junction of a functionally graded cone type spacer in a gas insulated busduct with metal inserts

Naidu

Kumar

2017

High Voltage

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Insulation integrity of supporting insulator plays a vital role for determining the continuity of service of the gas insulated substation which depends upon the electric field stress distribution on the surface of the spacer. Triple junction formed by the conductor, SF 6 gas and support insulator is another critical area where the field stress is to be maintained at minimum value. Shape control is a technique employed for obtaining uniform field stress along the surface of the spacer but this technique may sometimes leads to very uneven shapes. In this study, a functional graded material is designed for the standard cone type spacer to obtain uniform field stress along the surface of spacer to overcome the above problem. The grading of spacer is done with different permittivities. Electric field is computed for three cases namely grading to high, grading to low and U Shape. The metal inserts were tuned and stress is obtained in account of lower fields at the triple point junction and an improved uniform field distribution along the surface is obtained.

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