高电压技术2025，Vol.51Issue(10)：5228-5237,10.DOI:10.13336/j.1003-6520.hve.20241480
天然酯绝缘油中工频电弧放电特性及其对变压器防爆性能的影响
Power-frequency Arc Discharge Characteristics of Natural Ester Insulating Oil and Its Influence to Transformer Explosion-proof Performance
摘要
Abstract
Natural ester insulating oil has the advantages of environmental protection,renewable property,high ignition point,high safety,etc.At present,the research on the characteristics of high energy arc discharge at working frequency in natural ester insulating oil is rarely available in the literature.We performed the experiments of high-frequency high-energy arc in different insulating oils with rod-stick electrodes,and compared the differences of arc discharge char-acteristics between mineral oil and natural ester in terms of arc energy,pressure characteristics,gas production characteristics,and so on.The results show that,under the same arc current and gap distance(5 kA,30 mm),the arc en-ergy in mineral oil and natural ester is 48.267 kJ and 41.891 kJ,respectively.The arc energy,pressure peak,gas production,gas production rate,bubble surface area,gas production per unit area and average voltage gradient of the nat-ural ester are smaller than those of mineral oil.In the process of arc discharge in oil,arc discharge,insulating oil cracking gas production and bubble pulsation are coupled with each other.The type of insulation oil significantly affects the gas production rate per unit area,which in turn causes the differences in the discharge characteristics.Under the same exper-imental conditions,the peak pressure generated by arcing in natural ester is 47％lower than that in mineral oil,indicating that the use of natural ester can significantly reduce the pressure rise inside the transformer under arcing faults and im-prove its explosion-proof capability.In addition,the experimental results of this paper can be further used to guide the parameterization of natural ester transformer gas protection.关键词
变压器/油中电弧/天然酯/矿物油/变压器防爆Key words
transformer/arc in oil/natural ester/mineral oil/transformer explosion-proof引用本文复制引用
陈艺昕,贾云飞,汲胜昌,丘子诚,罗迅,高婉婧,惠思思..天然酯绝缘油中工频电弧放电特性及其对变压器防爆性能的影响[J].高电压技术,2025,51(10):5228-5237,10.基金项目
国家重点研发计划(2023YFB2407001).Project supported by National Key R&D Program of China(2023YFB2407001). （2023YFB2407001）
