| 引用本文: | 李琳,谢裕清,刘刚,王帅兵.油浸式电力变压器饼式绕组温升的影响因素分析[J].电力自动化设备,2016,36(12): |
| LI Lin,XIE Yuqing,LIU Gang,WANG Shuaibing.Influencing factor analysis for disc-type winding temperature rise of oil-immersed power transformer[J].Electric Power Automation Equipment,2016,36(12): |
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| 摘要: |
| 对油浸式电力变压器饼式绕组的油流流速及温度分布特征进行了研究，同时分析了水平油道宽度等参数对油道油流流速及绕组温升的影响。以1台容量为321.1 MV·A的油浸式换流变压器网侧绕组结构为原型，建立了绕组温升的物理计算模型。结合变压器设计原理设置不同的油道参数，计算了绕组油道油流流速以及温度的分布情况，分析了入口油流速度、水平油道宽度、饼式绕组分区数量以及导线匝间绝缘厚度等参数对油道油流流速及绕组温升的影响。结果表明：饼式绕组热点位置位于最后一个分区中心线饼附近；不同的入口油流流速、水平油道宽度及饼式绕组分区数将影响水平油道中的油流速度分布，进一步影响绕组的温度分布及热点温升；导线匝间绝缘厚度对油流速度分布没有影响，但对绕组的温升有一定的影响。 |
| 关键词: 温升 热点 饼式绕组 油流速度分布 油道参数 电力变压器 |
| DOI：10.16081/j.issn.1006-6047.2016.12.013 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51277064)；中央高校基本科研业务费专项资金资助项目(JB2015131) |
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| Influencing factor analysis for disc-type winding temperature rise of oil-immersed power transformer |
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LI Lin1, XIE Yuqing1, LIU Gang2, WANG Shuaibing1
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1.State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China;2.Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, Baoding 071003, China
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| Abstract: |
| The temperature distribution and oil speed distribution in the disc-type winding of oil-immersed power transformer are studied and the influence of different parameters on the oil speed and winding temperature rise are analyzed. The physical calculation model of winding temperature rise is established with the grid-side winding of an 321.1 MV·A oil-immersed converter transformer as its prototype. Different oil duct parameters are set according to the transformer design theory, the oil speed and temperature distribution of winding oil duct are calculated, and the influence of different parameters, such as inlet oil speed, horizontal oil duct width, section quantity and inter-turn insulation thickness, on the oil speed and temperature distributions are analyzed. Results show that, the hot spot of disc-type winding is near the middle disc of the last section; the inlet oil speed, horizontal oil duct width and section quantity affect the oil speed distribution, which further affects the winding temperature distribution and hot spot temperature rise; the inter-turn insulation thickness has no influence on the oil speed distribution, but a certain influence on the winding temperature rise. |
| Key words: temperature rise hot spot disc-type winding oil flow pattern oil duct power transformers |
