容春艳,胡诗尧,李腾,苏钟焕,程蓉,王贵娟.高压内置型高阻抗变压器励磁涌流特性分析及工程计算[J].电测与仪表,2025,62(1):217-224. RONG Chunyan,HU Shiyao,LI Teng,SU Zhonghuan,CHENG Rong,WANG Guijuan.Analysis and engineering calculation of excitation inrush current characteristics of high voltage built-in high impedance transformer[J].Electrical Measurement & Instrumentation,2025,62(1):217-224.
高压内置型高阻抗变压器励磁涌流特性分析及工程计算
Analysis and engineering calculation of excitation inrush current characteristics of high voltage built-in high impedance transformer
This paper presents a calculationscheme of inrush current of high voltage built-in high impedance transformer which takes into account the nonlinear changes of remanence and excitation inductance. Firstly, the inrush current model of the high voltage built-in high impedance transformer is constructed, and its amplitude, attenuation and harmonic characteristics are deeply analyzed. Secondly, a simulation system for a high-voltage built-in high-impedance transformer that meets the engineering practice is built, the excitation inrush current model and its characteristics of transformer are explored, a simulation and engineering calculation method that can quickly and effectively calculate the excitation inrush current is proposed, and the peak value and attenuation time of the simulation and engineering calculation method are verified according to the waveform of the field recording diagram. This paper discusses and summarizes the excitation inrush current characteristics of high voltage built-in high impedance transformer under the influence of many factors, and provides a certain reference for operation strategy and protection setting optimization.
