Parallel interlinking PWM current source converter for hybrid AC/DC microgrids

In this paper, a parallel PWM current source converter (CSC) based interlinking converter is proposed for hybrid AC/DC microgrid power control. In order to achieve rapid dynamic and to avoid over loading of CSC, a DC current balance control method through online space vector selection is proposed. It can achieve an accurate DC link current sharing and can reduce the DC link current ripples with the proposed small vector optimization method. Theoretical analysis and verification results show that the proposed system is good candidate to interconnect AC and DC networks.