A bipolar DC microgrid containing voltage balancers can realize multiple-voltage power supplies with broad application prospect, but still lacks specific DC feeder fault isolation and location schemes. Therefore, a reliability coefficient for fault pole selection under fault scenarios is introduced to establish the detection criteria for the single pole and inter-pole short circuit faults of DC feeders. The fault element is accurately isolated and the fault section is precisely located through the cooperation between the fast tripping of the DC Circuit Breakers (DCCBs) at the outlets of power sources and the delayed tripping of the DCCBs at the outlet of the grid-connected converter. Finally, the voltage control strategies of the DC-DC converters of multiple energy storages in DC micro grids are improved, and a complete protection scheme for DC feeder faults is formed. The PSCAD simulation results show that the proposed scheme can realize reliable identification and section location of different DC feeder faults, and combined with the corresponding control strategy, the operational stability and supply continuity of the non-fault pole under a unipolar fault condition is significantly improved. In addition, the economic performance is relatively good. This work is supported by the General Fund of the National Natural Science Foundation of China (No. 51877088) and the Science and Technology Project of State Grid Hunan Electric Power Co., Ltd. (No. 5216A018007W).