As we know, droop regulation extends the linear working area of a converter and correspondingly expands the variation range of PCC voltage, which also means we can decrease the installation capacity of the device, but the researches on it for MMC-DSTATCOM by far are only based on balanced PCC voltage. In fact, due to different types of loads in distribution grid, PCC voltage is easily unbalanced. This paper gives us a droop regulation strategy that adapt to unbalanced PCC voltage. Positive- and negative-sequence compensation strategy are proposed to solve unbalanced PCC voltage situation, while positive-sequence control is utilized to compensate the positive-sequence component of PCC voltage to rated value and the negative-sequence control aims to cancel out the negative-sequence part completely. When PCC voltage goes to balance, the inner-loop active power and reactive power control strategy and outer-loop droop regulation are introduced. Simulation and experiment tests acquired from a 60 V/2 kVA prototype verify the accuracy of droop regulation under unbalanced PCC voltage.