Transformer arc fault explosion numerical simulation method and device based on gas inflow

The invention relates to a transformer arc fault explosion numerical simulation method and device based on gas inflow. The method comprises the following steps that the fault position, fault energy and fault duration of a transformer are obtained; simplifying and establishing a transformer fluid-structure interaction finite element model containing the insulating oil and considering the strain rate effect; calculating the mass inflow rate and the boundary flow rate of the gas based on the fault energy and the fault duration; and based on the mass inflow rate and the boundary flow velocity, injecting gas into the fault position through an inflow boundary to realize simulation of the arc fault explosion process of the transformer. Compared with the prior art, the method has the advantages of improving simulation accuracy and the like. 本发明涉及一种基于气体流入的变压器电弧故障爆炸数值模拟方法及设备，该方法包括以下步骤：获取变压器的故障位置、故障能量和故障持时；简化并建立考虑应变率效应的包含绝缘油的变压器流固耦合有限元模型；基于所述故障能量和故障持时计算气体的质量流入率和边界流速；基于所述质量流入率和边界流速，通过流入边界将气体注入所述故障位置处，以实现变压器电弧故障爆炸过程的模拟。与现