Abstract: In the DC microgrid，bus voltage stability is the key to maintain the normal operation of the system.

Load switching and distributed micro-source power fluctuations will affect the stability of the DC bus voltage. To

solve the above problem，a compensation control strategy based on the residual generator was proposed. Firstly，the state-space model of the Boost system was established. Then，the DC I—V droop control method and voltage

deviation compensation control were designed. Finally，a compensation control structure based on the residual

generator was designed for current disturbance，and the voltage dynamic compensation controller was obtained by the model matching principle. Simulation experiments show that the control strategy can effectively solve the DC bus voltage fluctuation problem，and enhance the robustness of the DC microgrid system.

      Key words: DC microgrid；power quality；residual generator；model matching