CAJ | 학술논문

应用 MATLAB 对机车主变压器与变流装置系统的谐波特性进行仿真分析，详细讨论整流逆变滤波电路参数、PWM 控制的调制比和载波比等对变压器二次侧电流及逆变输出电压谐波含量的影响，分析结果表明：当整流回路的滤波电容达到一定数值后改变电感，变压器二次侧电流的主要次谐波含量变化不明显；当逆变输出控制的 PWM 调制比适当时，输出电压的谐波含量随载波比的变化较为平缓。
응용 MATLAB 대궤차주변압기여변류장치계통적해파특성진행방진분석，상세토론정류역변려파전로삼수、PWM 공제적조제비화재파비등대변압기이차측전류급역변수출전압해파함량적영향，분석결과표명：당정류회로적려파전용체도일정수치후개변전감，변압기이차측전류적주요차해파함량변화불명현；당역변수출공제적 PWM 조제비괄당시，수출전압적해파함량수재파비적변화교위평완。
Harmonic characteristics of main transformer and converter devices in locomotive elec-trical system were studied in detail by using MATLAB simulation.This paper discussed the influ-ence of converter filter parameters,modulation ratio and carry ratio of PWM controller in the harmonics of transformer secondary side current and inverter output voltage.The analysis results showed that when the capacitor of rectifier circuit reached to some value,the current harmonics at transformer secondary side changed a little.Meanwhile,when the modulation ratio of PWM controller was reasonable,the harmonics of output voltage changed gently with the changing of carry ratio.