In order to cope with technical challenges of bipolar balancing and power quality issues of DC distributed system,a new solution based on front-end current balancer(FECB) has been proposed in this paper,which will be operated in the scenario of high percentage distributed generation(DG). The positive-and negative-line currents for each user node could be balanced by installing FECB at each corresponding PCC. The whole system will be operated symmetrically under an ideal network condition. A novel FECB topol...