中文说明：
AC-DC转换器采用三相三电平PWM电压源转换器,通过线性预测算法预测谐波电流在下一个时刻的参考值以实现谐波电流的跟踪。
English Description：
The AC-DC converter adopts three-phase three-level PWM voltage source converter. The reference value of harmonic current at the next moment is predicted by linear prediction algorithm to realize harmonic current tracking.