Abstract: The DC collection and transmission provides a feasible solution for future large-scale renewable energy consumption in the desert. A DC converter is the key equipment of a renewable energy DC collection system. With the advantages of low loss in the full load range and good waveform quality, the resonant DC converter may have a good application in the renewable energy DC collection scenario. However, owing to the characteristics of low resonant impedance and fast rise of short-circuit fault current, the fault current of such a converter must be limited. A novel bipolar DC/DC converter with short-circuit current limiting capability is proposed in this paper. Firstly, the operation principle of the topology and its parameter design method is analyzed. Then by illustrating the fault current limiting mechanism of the proposed converter, its fault current control method is designed. Finally, the feasibility of the proposed circuit and fault current limiting method is verified by the Matlab/Simulink simulation and experimental prototype. The results show that the proposed converter is able to realize the DC fault current limitation. In addition, it is able to maintain the normal operation of one pole when the other fails, improving the reliability of the power supply. The relevant research results will provide a technical reference for the construction and engineering implementation of the renewable energy DC collection system.