击穿电弧下绝缘油中炭黑颗粒的生成特性 及对油击穿特性的影响
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作者单位:

三峡大学

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中图分类号:

TM404

基金项目:

国家自然科学基金项目(面上项目,重点项目,重大项目)


Research on Generation Characteristics of Carbon Black Particles in Transformer Oil under Breakdown Arc and Impact on Oil Breakdown Characteristics
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Affiliation:

China Three Gorges University

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    绝缘油在击穿电弧下炭黑颗粒的粒径生成特性对其绝缘性能和累次击穿电压有重要影响。为了获得击穿后的电弧能量与对炭黑颗粒粒径生成及击穿特性的影响,搭建了基于多参量观测的绝缘油击穿电弧下的炭黑颗粒试验平台,分析了油隙距离和静置时间对击穿电压的影响,并计算了电弧能量,基于电激光粒度仪和图像识别炭黑颗粒的粒径分布,在此基础上分析了电弧能量与炭黑颗粒粒径分布之间的关系。试验结果表明:绝缘油击穿后生成的炭黑颗粒粒径主要集中在5μm~50μm之间,随着击穿电压的增大,电弧能量变大,炭黑颗粒的生成数量增多且粒径大的炭黑颗粒占比上升;电弧能量越大越有利于生成大粒径颗粒,大粒径颗粒触发放电能力强,会导致累次击穿试验中击穿电压发生明显下降,增加静置时间有助于炭黑颗粒的扩散而减小对击穿电压的影响。

    Abstract:

    The particle size generation characteristics of carbon black particles under breakdown arc have important influence on insulation performance and repeated breakdown voltage. In order to obtain the effect of arc energy after breakdown on the particle size generation and breakdown characteristics of carbon black particles, a carbon black particle test platform based on multi-parameter observation was built. The influence of oil gap distance and static time on breakdown voltage was analyzed. The results show that the particle size of carbon black particles after breakdown of insulating oil is mainly between 5μm~50μm. With the increase of breakdown voltage, the arc energy increases, the carbon black particles increase and the proportion of carbon black particles increases.It is found that the larger the arc energy, the more favorable the formation of large particle size particles, and the stronger the trigger discharge ability of large particle size particles, which will lead to the obvious decrease of breakdown voltage in repeated breakdown test. Increasing the static time is helpful to the diffusion of carbon black particles and reduces the effect on breakdown voltage.

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吴田,夏圆. 击穿电弧下绝缘油中炭黑颗粒的生成特性 及对油击穿特性的影响[J]. 科学技术与工程, , ():

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  • 收稿日期:2021-05-17
  • 最后修改日期:2021-09-08
  • 录用日期:2021-09-29
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