双变频器系统的优化与研究

Dual-drive system optimization and Research

双变频器系统在电力牵引，电力推进等大功率场合有很好的应用空间，若两台变频器独立的带2台电动机工作，直流端电流的谐波则是单台变频器的2倍；较大的谐波会增大所选的直流侧电容的大小，而且也会影响电容的寿命。本文通过对单个三相变频器的直流端谐波的分析，提出一种方法来改善双变频器直流侧谐波问题，并通过SIMULINK仿真来对其进行可行性分析。

Dual-drive system in electric traction, high-power electric propulsion and other applications where there is a good space, if the two drive motors with 2 independent work, the DC-side harmonic current is 2 times of a tingle frequency, higher harmonics will increase the selected DC capacitor size, but will also affect the capacitance of life.Based on the single-phase inverter DC side harmonic analysis, a method to improve the dual-inverter DC side harmonics, and adopted its SIMULINK simulation to conduct a feasibility analysis.