【摘要】 利用大型变压器进行模拟故障的试验研究周期长、代价高,且不易获取试验数据,而通过仿真模拟故障可方便获取更全面的故障数据,有利于诊断方法的研究。现有冲击电压下绕组分布参数模型考虑不全面,误差较大,不利于进行故障特征分析。以一个单相双绕组变压器模型为例,利用有限元法计算了绕组分布参数,通过与多导体传输线模型对比,选择合理的电气参数建立改进的分布参数模型,仿真结果表明此模型可更准确进行雷电冲击下变压器绕组故障模拟,有利于故障特征分析和诊断方法的研究。更多还原

【Abstract】 The experimental study on the fault using the original model of a large transformer is of long period and high cost,and it is not easy to obtain valid data.It is convenient to obtain more comprehensive fault data through simulation,which is helpful to the study of diagnosis method.The parameters of the transformer winding distribution parameter model under lightning impulse voltage are not comprehensive and have a certain error,which is unfavorable for the fault feature analysis.A single phase two-winding transformer model was taken as an example.The winding distribution parameters were calculated by the finite element method.Through the comparison with the multi-conductor transmission line model,the reasonable electrical parameters were selected to establish the improved distributed parameter model.The simulation results show that the model can be used to more accurately simulate the fault of transformer windings under lightning impulse,which is conducive to research on fault feature analysis and diagnosis method.更多还原