摘要
在考虑了油浸变压器油粘度、损耗随温度变化的情况后,根据热传导理论和不同情况下非线性热阻的定义,推导出了可用于估算不同类型变压器绕组热点温度的动态模型。通过ONAN制冷变压器的实测数据和专用模型的验证,表明该模型是正确、有效的。
Hot-spot thermal models taking into account that oil viscosity changes and loss variation with temperature were presented. The models are based on heat transfer theory and a new definition of nonlinear thermal resistances at different locations within a power transformer. The new thermal models will be validated using experimental and expert model on a ONAN-eooled unit. The results verified the accuracy of thermal models.
出处
《机电工程》
CAS
2007年第1期1-3,6,共4页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(50575095)
关键词
热点温度
顶层油温
底部油温
非线性热阻
hot-spot temperature
top-oil temperature
bottom-oil temperature
nonlinear oil thermal resistance
