A Critique of Methods for Calculating the Dielectric Strength of Gas Mixtures and a Proposed Test for -Synergism

Wootton, R. E.; Chantry, P. J.

doi:10.1016/b978-0-08-025978-9.50008-1

Cited by 10 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6). However, there is increasing evidence that this interpolation will not work for all gases [35,36]. Only for SF 6 -N 2 and SF 6 -He gases has there been an attempt [36] to calculate the coefficients from actual basic data.…”

Section: Breakdown In Gas Mixturesmentioning

confidence: 97%

“…The limitations of the technique of interpolating ionisation and attachment coefficients from the constituent gases are now becoming apparent. Promising preliminary calculations are being made with fundametnal cross-section data to predict ionisation, attachment and breakdown in the mixtures, and this work should be extended [35,36]. For these mixtures it will be possible to include by calculation the effect of electrode roughness, contamination etc.…”

Section: Gas Breakdownmentioning

confidence: 98%

See 1 more Smart Citation

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

Cookson

1981

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

View full text Add to dashboard Cite

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.

show abstract

Section: Breakdown In Gas Mixturesmentioning

confidence: 97%

Section: Gas Breakdownmentioning

confidence: 98%

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

Cookson

1981

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

View full text Add to dashboard Cite

show abstract

“…With further study, researchers found that the insulation characteristics of gas mixtures containing SF 6 gas did not increase linearly according to the mixing ratio of SF 6 , and the electrical strength of the mixture was higher than the weighted average of the electrical strength of the two gas components. In 1980, Wootton and Chantry first used synergism to describe this phenomenon [6]. In the study of synergistic effect, scholars have found that there are also super synergistic effect and negative synergistic effect, which are shown in Figure 1.…”

Section: Introductionmentioning

confidence: 98%

“…to replace pure SF 6 as the insulation medium [3][4][5]. With further study, researchers found that the insulation characteristics of gas mixtures containing SF 6 gas did not increase linearly according to the mixing ratio of SF 6 , and the electrical strength of the mixture was higher than the weighted average of the electrical strength of the two gas components. In 1980, Wootton and Chantry first used synergism to describe this phenomenon [6].…”

Section: Introductionmentioning

confidence: 99%

“…At first, researchers studied the synergistic effect of SF 6 gas mixture in order to solve the problems of high liquefaction temperature, sensitivity to electric field, and the high price of SF 6 gas [7]. However, with the deepening understanding of SF 6 , scholars have found that SF 6 is a strong greenhouse gas. It is estimated that the global annual production of SF 6 gas is more than 20,000 tons and 80% of SF 6 gas produced globally each year is used in the power industry.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research Progress on Synergistic Effect between Insulation Gas Mixtures

Zhao¹,

Xiao²

2020

Modern Applications of Electrostatics and Dielectrics

View full text Add to dashboard Cite

Synergetic effect is a special gas discharge phenomenon among insulating gas mixtures, which has important reference value for gas selection of future gasinsulated power equipment. The research progress and investigation methods of synergistic effect and insulation characteristics of different gas mixtures at home and abroad are reviewed in this chapter. The synergistic effect between different kinds of gas mixtures including SF 6 gas mixtures and some new insulation gases such as cC 4 F 8 , CF 3 I, and C 4 F 7 N is presented. Combined with the results of multiple studies, it can be seen that the synergistic effect of the gas mixture has a certain relationship with the electronic transport parameters and discharge patterns. Besides, the synergistic effect of the same gas mixture may change with the change of external conditions such as gas pressure, voltage type, and electrode distance.

show abstract