Influence of partial discharge on temperature rise of windings of mine-used flameproof dry-type transformer
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摘要: 为了分析矿用隔爆型干式变压器绕组绝缘层中的气隙或杂质等缺陷对绕组温升的影响，以一台连续式绕组1 000 kVA/10 kV矿用干式变压器作为研究对象，介绍了矿用干式变压器绕组匝间及层间绝缘结构；借助红外摄像仪对不同放电类型和不同老化温度下试样的温升特性曲线进行类比分析，得出以Nomex绝缘纸为绝缘层的干式变压器匝间放电及层间放电与温度之间的关系；运用传热学原理并结合绝缘材料特性进行数值计算及分析，得出矿用干式变压器匝间放电对绕组发热过程的影响，为变压器内部热点温度的定位及局部放电点的准确定位提供了理论依据。Abstract: In order to analyze influence of air gaps or impurities in insulation layer on temperature rise of windings of mine-used flameproof dry-type transformer, a mine-used 1 000 kVA/10 kV dry-type transformer with continuous winding was selected as research object, inter-turn and inter-layer insulation structures of windings of dry-type transformer were introduced. Infrared thermal imaging camera was used for analogy analysis of temperature rise characteristics of the samples under different discharge types and different aging temperatures, and relationship between temperature and inter-turn discharge and inter-layer discharge of dry-type transformer using Nomex insulation paper as insulating layer was obtained. Using theory of heat transfer and combining with insulation material characteristics to calculate and analyze the influence of inter-turn discharge dry-type transformer on heating process of windings. The paper provides theoretical basis for accurately locating hot spot temperature inside transformer and partial discharge point.
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期刊类型引用(4)
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2. 张志斌，任明，宋波，陈荣发，余家赫，范文杰，董明. 冷绝缘超导电缆终端用环氧玻璃钢材料绝缘劣化机制研究. 中国电机工程学报. 2022(05): 1690-1701 . 百度学术
3. 曹金京，张村. 非晶合金干式变压器温升异常监测方法研究. 工业加热. 2022(04): 58-62 . 百度学术
4. 王李. 基于混合神经网络的矿用干式变压器故障诊断研究. 世界有色金属. 2019(14): 177-178 . 百度学术
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