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Progress in Studying Electrical Features of Environment-friendly
In order to overview the exploration development within the electrical Attributes of natural environment-helpful insulating gases lately, and to progress the analysis and software of latest gases, we have refined two tips on how to evaluate gas insulation functionality as well as suitable situations from 3 aspects of discharge mechanism, discharge properties, and new gasoline exploration, specifically important minimized area strength and breakdown discipline strength. The influences of regional uneven electric field, force, temperature, and fuel combination on electrical Attributes are obtained, which is helpful for assessing the electrical Attributes of latest gas. To solve the situation of poor effectiveness of new gasoline research, the theory of overall performance prediction dependant on microscopic parameters of fuel molecules are introduced. Eventually, two Instructions are set ahead within the investigate of natural environment-friendly fuel. One would be to improve the insulation performance looking at the coupling influence things in the practical equipment. The second is toexplore new gases with far better electrical Houses based on the speculation of molecular framework parameters prediction. © 2018, Superior Voltage Engineering Editorial Office of CEPRI. All proper reserved.
Impulse Insulation Residence of SF6/N2 Combination Beneath Small Temperatures
SF6/N2 gasoline mixture is A short lived choice for SF6 substitute as insulation dielectrics. We applied the collision ionization principle As an example the system of the temperature affect within the insulation performance of SF6/N2 gas combination. In addition, we verified the experimental final results from the insulation efficiency of SF6/N2 gasoline combination by theoretical Evaluation, which was considered one of SF6 choice decisions, less than significant pressure and small temperature at −35℃, −18℃ and 0℃. The sphere-plate and rod-plate aluminum electrodes ended up placed on develop the uniform and non-uniform electrical discipline. The polarity effect of breakdown voltage of SF6/N2 and pure SF6 as well as the electric field coefficient could be received. It truly is discovered that the electric industry sensitivity component of SF6/N2 at 0.seven MPa with twenty% SF6 is lessen than that of SF6 at 0.four MPa under a favourable impulse voltage. Having said that, the electrical subject sensitivity component of SF6/N2 or SF6 is analogous below a damaging voltage. Meanwhile, it truly is observed the p-T characteristics of genuine gases deviate from perfect gases, which turns into increased because the temperature lowers. The compressibility aspect of SF6/N2 fuel combination with force of 0.seven MPa and SF6mole ratio of 20% is obtained throughout the examination. The compressibility aspect will increase linearly with the lower of temperature from 0℃ to −35℃. © 2017, Large Voltage Engineering Editorial Section of CEPRI. All right reserved.