Voltage balance control method of direct current transformer

The invention provides a voltage balance control method of a direct current transformer. The direct-current transformer comprises at least N modules, each module comprises at least one pre-stage circuit and at least one power circuit, and the modules serve as normal modules or redundant modules or bypass modules based on the working states of the pre-stage circuits and the power circuits; the control method comprises the following steps: adjusting the voltage balance of a first direct current port of the normal module through the balance control of the operation power of the normal module; and reversely adjusting the voltage of the first direct current port of the redundant module based on the second common direct current port. 本申请提供一种直流变压器的电压均衡控制方法。所述直流变压器包含至少N个模组，每个模组包含至少一个前级电路和至少一个功率电路，基于所述前级电路和所述功率电路的工作状态，所述模组作为正常模组或冗余模组或旁路模组；所述控制方法包括：通过所述正常模组运行功率的均衡控制，调节所述正常模组第一直流端口的电压均衡；基于第二公共直流端口，反向调节冗余模组第一直流端口的电压。