高压电器2025，Vol.61Issue(10)：11-20,10.DOI:10.13296/j.1001-1609.hva.2025.10.002
天然酯和矿物油中碳颗粒产生规律及其对油品电性能的影响研究
Research on Generation Mechanism of Carbon Particles in Natural Ester and Mineral Oil and Their Impact on Electrical Properties
摘要
Abstract
The effect of tiny carbon particles produced by discharge on the performance of transformer insulating oil has not been paid sufficient attention by the industry,especially the difference in the generation mechanism of carbon particles in natural ester and mineral oil is rarely studied.In this paper,No.25 mineral insulating oil and FR3 natural ester insulating oil are taken as the object,the generation mechanism of carbon particles in oil and its influence on electrical properties are compared and studied.Such characteristic parameters as the number,particle size and shape of carbon particles in two types of insulating oil under different electrical breakdown are analyzed,and the influence of carbon particles on such electrical performances as breakdown voltage,dielectric loss and DC resistivity of insulat-ing oil is clarified.The results show that the number of carbon particles in both types of insulating oil increases with the increase of breakdown times,and the quantity of carbon particles in mineral oil is about 2-5 times higher than that of natural ester.After breakdown,more than 80%of the carbon particles are distributed in the range of 0-10 μm,in which the proportion of 0-5 μm particles shows different trends with the increase of breakdown times.The roundness of large carbon particles in mineral oil is lower than that of natural ester,and the shape is more irregular.The carbon particles produced after electrical breakdown lead to electrical performance degradation of the two types of insulating oil,of which the degradation of mineral oil is more severe than that of natural ester.After 50 times of breakdown,its dielectric loss in increased by 427.3%,resistivity is decreased by 65.2%;In contrast,the dielectric loss of the eles-ter is only increased by 7.8%,while the resistivity is also reduced by only 8.2%.关键词
矿物绝缘油/天然酯绝缘油/碳颗粒/产生规律/电气性能Key words
mineral insulating oil/natural ester insulating oil/carbon particles/generation rules/electrical properties引用本文复制引用
张晓琴,朱洪斌,冯上权,杨延涛,陈宸,赵学童,杨丽君..天然酯和矿物油中碳颗粒产生规律及其对油品电性能的影响研究[J].高压电器,2025,61(10):11-20,10.基金项目
国家电网有限公司科技项目(J2024045).Project Supported by Science and Technology Project of State Grid Corporation of China(J2024045). （J2024045）
