油浸式电力变压器绕组电场强度的仿真分析

Simulation and Analysis of Electric Field Strength for Oil-Immersed Power Transformer Winding

以油浸式电力变压器绕组为例,建立其纵切面简化模型,得出了油浸式电力变压器高压和低压绕组电场强度的分布,分析绕组端部的电场强度分布。并通过改变绝缘纸板的厚度分析绕组端部和变压器内部其他部件的电场强度变化情况。分析结果能为绕组端部绝缘电气强度及有关电磁参数的计算提供一定的参考价值。

Taking the oil-immersed power transformer winding for example,this paper established a simplified model of longitudinal section of the oil-immersed power transformer winding.The electric field strength distribution of high-voltage and low-voltage windings of the oil-immersed power transformer was obtained.The electric field strength distribution of the winding overhang was analyzed.The electric field strength changes of the winding overhang and other parts inside the transformer were analyzed by changing the thickness of insulating paper board.The result provides a reference value for the insulating electrical strength of the winding overhang and the calculation of the electromagnetic parameters.