Direct-current direct-hanging type energy storage system and control method thereof

The invention provides a direct current direct hanging type energy storage system and a control method thereof, specifically, the direct current direct hanging type energy storage system comprises a commutation chain and a control unit, two ends of the commutation chain are connected in parallel between a high-voltage direct current transmission positive electrode wire and a high-voltage direct current transmission negative electrode wire, and the commutation chain comprises a plurality of cascaded modules; and the control unit is used for sending an action instruction to control the cascade module to adjust the active power and voltage of the direct current system. Through the modular cascade mode, the active power and voltage of the direct current system can be quickly adjusted, the direct current voltage stability is effectively maintained, and the stability of the direct current power transmission system is greatly improved. 本发明提供了一种直流直挂式储能系统及其控制方法，具体为：一种直流直挂式储能系统，其中，所述储能系统包括换流链以及控制单元，所述换流链的两端并联在高压直流输电正负极