油浸式变压器多物理场建模仿真研究

Simulation Study on the Multi-physics Field Modeling of Oil-immersed Transformer

基于流体力学以及传热学理论建立油浸式变压器的多物理场耦合分析模型。本文研究了油浸式变压器油流速度以及变压油的热导率对油浸式变压器温升的影响。结果表明:随着油流速度的增加,各部件最高温度均逐渐减小。由于油流速度增大的影响,各部件最高温度的位置在逐渐向各部件上端移动。变压器油热导率主要影响油浸式变压器温度的幅值,而对于温度场分布影响很小。随着热导率增大,变压器各部件的最高温度逐渐降低。

A multi-physical field coupling analysis model of oil-immersed transformer is established based on hydrodynamics and heat transfer theory.The influences of the oil flow velocity and the thermal conductivity of the transformer oil on the temperature rise of the oil-immersed transformer are studied.The maximum temperature of transformer components decreases gradually with the increase of oil flow velocity.The position of the highest temperature of each component is gradually moving to the upper end of transformer components due to the influence of the increase of oil flow velocity.The thermal conductivity of the transformer oil mainly affects the temperature amplitude of oil-immersed transformer,but has little effect on temperature field distribution.With the increase of the thermal conductivity,the maximum temperature of transformer components decreases gradually.