A knid of new charging start-up strategy is proposed for type MMC DC de-icing device in this paper soto

in case of starting up the device

reduce the impulse current. The interrelation between the DC capacitor voltage of the sub-model and the start-up current is studied through analysis of each charging stage of submodel during the start-up period and the minimum value of the capacitor voltage of the sub-module without inrush current is obtained. A kind of start-up strategy with small starting impulse current

safe and reliable performance is proposed. The theoretical analysis for this kind of start up strategy is performed and the analytical formula of the start-up process is derived. The theoretical maximum charging power is obtained and

in case of reducing the impulse current

the starting time is the shortest. The starting strategie is implemented on one set of full-bridge modular multilevel converter（MMC）de-icing device. The experinmental result

compared with the simulation data of the previous universal start-up strategy

greatly reduces the amplitude of the impulse current during the start-up and charging period of the MMC device

improves operation reliability of equipment and verifies the superiority of the start-up control strategy.The technology also has reference for the start-up strategy of MMC flexible DC transmission.