Shore power supply capable of automatically adjusting voltage

The invention discloses a shore power supply capable of automatically adjusting the voltage. The shore power supply comprises a frequency converter, an isolation transformer, a current feedforward unit, a voltage feedback unit and an adjustment controller. The output end of the frequency converter is connected with the primary side of the isolation transformer. The output end of the frequency converter is also connected with the input end of the current feedforward unit. The secondary side of the isolation transformer is connected with the input end of the voltage feedback unit. The current feedforward unit is used for collecting the output current of the frequency converter and transmitting a voltage fluctuation value to the input end of the frequency converter after determining the voltage fluctuation value based on the output current. The adjustment controller is used for determining adjustment parameters according to the output preset value of the system and the output voltage of the isolation transformer, and adjusting the input value of the frequency converter according to adjustment parameters. According to the technical scheme of the shore power supply, the current feedforward unit is additionally arranged. Since the current sampling speed inside the frequency converter is faster, the response is faster compared with the existing voltage closed-loop control manner. Therefore, the recovery time of the voltage fluctuation is effectively improved, and the adjustment time is shortened.