基于实测数据的CRH380A型高速动车组特征谐波建模

摘要

首先总结分析高速动车组牵引传动系统结构、谐波产生机理及低次谐波、高次谐波的分布特性;然后在大量CRH380A型高速动车组实测数据的基础上,利用不同方法分别对动车组的低次谐波和高次谐波进行建模.针对低次谐波,考虑谐波在多工况下的不同分布情况,在区分工况、输出功率的基础上统计其网侧谐波电流幅值概率分布,求解高斯分布参数,并用蒙特卡洛方法模拟电流数据.针对高次谐波,考虑谐波电压与谐波电流之间的耦合关系,在高次特征谐波频域内建立基于频率耦合矩阵的Norton谐波模型,利用谐波电压数据求解对应的谐波电流.误差分析显示,本文的建模方法能准确有效地还原高速动车组特征谐波特性.%In this paper,firstly,the structure of traction drive system of high-speed EMU,the harmonic gener-ation mechanism and the distribution characteristics of low-order and high-order harmonics were summarized and analyzed.Secondly,based on the massive field data of CRH380A EMUs,different methods were used to model the low-order and high-order harmonics,respectively.In terms of low-order harmonics,considering the different distribution of harmonics under multiple working conditions,based on the classification of working conditions and power output,the probability distribution of the amplitude of the harmonic current as well as the Gauss distribution parameters were calculated,while the Monte Carlo method was used to simulate the cur-rent data.In terms of high-order harmonics,considering the interaction between harmonic voltage and harmon-ic current,the frequency-coupling-matrix-based Norton harmonic model was built in the frequency domain of high-order characteristic harmonics,while harmonic voltage data were used to solve corresponding harmonic current.The error analysis suggested that the proposed methods can accurately and effectively restore the char-acteristics of the high speed EMU harmonics.