In accordance with the harmonic characteristics of the hybrid microgrid

such as complex harmonic frequencies

and the characteristics that harmonics can be transmitted on the AC and DC sides

we proposed a control strategy of virtual united harmonic suppressor. Taking the topology of interlinking converters in hybrid microgrids as the main body and combining DC active filters to form a virtual united harmonic suppressor

we controlled the switching of the three-phase H-bridge to generate the AC-side harmonic compensation current. Meanwhile

the DC ripple was also suppressed by controlling the power flow between the subgrids or starting the DC active filter in a timely manner. A MATLAB/SIMULINK simulation model wass built.The simulation results show that this control strategy not only carries out the harmonic compensation of the AC subnet

but also realizes the secondary compensation of the DC bus voltage ripple

and realizes the coordinated operation of the harmonic suppression system on the AC and DC sides initially. This method maximizes the use of the capacity of the interlinking converters

which can reduce the cost of installing harmonic control devices.