摘要
提出了一种基于热电类比理论的变压器热点温度计算的改进模型,考虑变压器在户外条件下受太阳辐射以及油箱壁与环境换热散热的影响,并且详细计算了变压器损耗与不同分接头之间的关系。综合考虑了油粘度和负载损耗随温度的变化。计算结果与一台自然油循环强迫空气冷却(ONAF)的220k V-300MVA的变压器出厂测试数据以及热点温度经典模型计算结果进行对比。
This paper presents an improved model for calculating hot spot temperature based on thermo-electricity analogy theory. The outdoor solar irradiation and the influence of heat exchange between oil tank wall and environment are considered; the relationship between transformer loss and different tap is calculated; the change of oil viscosity and load loss with temperature is taken into account. The calculation results are compared with an ONAF 220 k V-300 MVA transformer factory test data and results of a classic hot spot temperature calculating model,which indicates that the improved model has higher accuracy under dynamic load.
出处
《华东电力》
北大核心
2014年第12期2539-2543,共5页
East China Electric Power
基金
国网四川省电力公司科技项目(SGTYHT/13-JS-175)
关键词
油浸式变压器
热点温度
热电类比
油箱壁
分接头
oil-immersed transformer
hot spot temperature
thermo-electricity analogy
oil tank wall
load tap
