四象限整流器宽频建模与差频振荡分析  

Broadband Modeling of Four-quadrant Rectifier and Differential Frequency Oscillation Analysis

作　　者：王颖杰[1] 周海兰 陈永发 白飞莹 WANG Yingjie;ZHOU Hailan;CHEN Yongfa;BAI Feiying(School of Electrical Engineering,China University of Mining and Technology,Xuzhou 221000,Jiangsu,China)

机构地区：[1]中国矿业大学电气工程学院,江苏徐州221000

出　　处：《电气传动》2025年第3期3-12,共10页Electric Drive

摘　　要：不同动车组中四象限整流器的开关频率出现偏差时会引起电流低频振荡现象,不利于牵引电网运行。针对此问题,提出一种SPWM比较器的矩阵小信号建模方法,实现了单相PWM整流器开关频段特性的较精确描述。接着进一步建立并联四象限整流器的矩阵小信号模型,再利用所建模型分析不同动车组混跑时差频振荡产生的原因以及发生规律。最后,通过实验验证所建模型与分析结论的正确性。When the switching frequency of the four-quadrant rectifiers in different multiple units deviates,the current will experience low-frequency oscillation,which is not conducive to the operation of the traction power grid.Therefore,a matrix small-signal modeling method for SPWM comparators was proposed to analyze this issue,which achieves a more accurate description of the switching frequency characteristics of the single-phase PWM rectifier.Then,the matrix small-signal modeling of parallel four-quadrant rectifiers was further established,and then the model was used to analyze the causes and rules of differential frequency oscillation during mixed running of different multiple units.Finally,the correctness of the established model and analysis conclusions were verified through experiments.

关 键 词：四象限整流器 牵引电网 矩阵小信号模型 差频振荡 

分 类 号：TM461[电气工程—电器]