基于响应面法的换流变压器励磁涌流峰值快速计算分析

为解决传统数值法和软件仿真法求解变压器励磁涌流存在模型参数固定、效率低下等问题，提出将响应面拟合计算方法运用在换流变励磁涌流的计算中，实现考虑到主心柱在不同剩磁的条件下的励磁涌流峰值随合闸角变化的高效计算分析。理论分析变压器励磁涌流的产生机理，提取出关键影响因素，采用参数建模建立换流变压器模型，通过响应面试验设计拟合绕组初始电流、合闸角和励磁涌流峰值之间的响应面模型，并验证响应面的精度。研究成果可为变压器励磁涌流快速计算分析、电力变压器数字孪生技术提供技术参考。

Analysis of Fast Calculation of Peak Excitation Inrush Current of Converter Transformer under Different Remanent Magnetization Conditions

In order to solve the problems using traditional numerical method and software simulation method to solve the transformer excitation inrush current, such as parameters are fixed, inefficient and other problems, the method of response surface fitting calculation to the calculation of the excitation inrush current of the converter is applied, which realizes the efficient calculation and analysis of the variation of the peak excitation inrush current with the closing angle considering the main core column under different remanent magnetization conditions. The generation mechanism of transformer excitation inrush is theoretically analyzed, and the key influencing factors are extracted. Parametric modeling is used to establish the converter transformer model in this paper. The response surface model between the initial winding current, the closing angle and the peak excitation inrush current is fitted by the response surface experimental design and the accuracy of the response surface is verified.The research results which providing technical reference for fast calculation and analysis of transformer excitation inrush current and digital twinning technology for power transformers.