矿用隔爆型干式变压器绕组局部放电对温升的影响  

Influence of partial discharge on temperature rise of windings of mine-used flameproof dry-type transformer

作　　者：万志强 曹鹏刚 宋建成[2,3] 雷志鹏[2,3] WAN Zhiqiang;CAO Penggang;SONG Jiancheng;LEI Zhipeng(Shanxi Electric Power Engineering Co.,Ltd.,China Energy Engineering Group,Taiyuan 030001,China;National and Provincial Joint Engineering Laboratory of Mining Intelligent Electrical Apparatus Technology,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Key Laboratory of Mining Electrical Equipment and Intelligent Control, Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]中国能源建设集团山西省电力勘测设计院有限公司,山西太原030001 [2]太原理工大学矿用智能电器技术国家地方联合工程实验室,山西太原030024 [3]太原理工大学煤矿电气设备与智能控制山西省重点实验室,山西太原030024

出　　处：《工矿自动化》2018年第5期36-41,共6页Journal Of Mine Automation

基　　金：山西省科技创新团队建设项目(2012011001)

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 000kVA/10kV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。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.

关 键 词：隔爆型干式变压器 绕组绝缘 局部放电 匝间放电 层间放电 温升特性 

分 类 号：TD60[矿业工程—矿山机电]