中文说明：
自己做的高压直流输电的半边模型，采用定电流控制。在普通12脉波高压直流输电的基础上，替换b、c相的变压器为移相变压器，消除了11、13次谐波。
English Description：
The half model of HVDC transmission made by myself adopts constant current control. On the basis of ordinary 12 pulse high voltage direct current (HVDC) transmission, the phase-shifting transformer is used instead of phase-b and phase-c transformer, and the 11th and 13th harmonics are eliminated.