不同拓扑结构的辅助逆变器并联谐波抑制研究

Research on Parallel Auxiliary Inverter Harmonic Suppression With Different Topologies

车载辅助逆变器带非线性负载时,会在380V交流母线电压处引入低次谐波,一般通过对控制算法的改进来优化输出电压质量,但不同拓扑结构的辅助逆变器并联时,两台辅助逆变器的谐波抑制功能会出现失效甚至加剧谐波的现象,在此通过对谐波抑制机理的研究,改进了谐波抑制模块的控制算法,实现了两台不同拓扑结构的辅助逆变器并联时的谐波抑制。

When the vehicle auxiliary inverter has a nonlinear load,low-order harmonics will be introduced at the AC380 V bus voltage.Generally,the output voltage quality is optimized by improving the control algorithm,but when auxiliary inverters of different topologies are connected in parallel,the harmonic suppression function of these two auxiliary inverters will fail or even aggravate the harmonics.Through the study of the harmonic suppression mechanism,the control algorithm of the harmonic suppression module is improved,and the harmonic suppression in parallel auxiliary inverters of two different topologies are realized.