Test platform of energy storage converter

A test platform of an energy storage converter (PCS) comprises an AC voltage modulation unit, an upper computer, an adjustable DC power supply unit and an oscilloscope. The input end of the AC voltage modulation unit is connected to a power grid, the output end of the AC voltage modulation unit is connected to the AC voltage end of the PCS, the output of the adjustable DC power supply unit is connected to the DC voltage end of the PCS, the control end of the host computer is connected to the control end of the PCS, and the oscilloscope is connected to the PCS. In a charging mode, the AC voltage modulation unit gradually raises the AC voltage, and the PCS receives a rectification test signal and rectification test of the upper computer when the AC voltage is in a low-voltage state, and outputs a result to the oscilloscope; in the discharging mode, the adjustable direct-current power supply unit supplies direct-current voltage which is gradually increased, and when the direct-current voltage is in a low-voltage