Abstract：In view of the need to test the operation of power electronic equipment under various working

conditions in the current new power system，a control strategy using linear auto-disturbance rejection technology

was proposed to study the power grid simulator with line impedance simulation function. On this basis，in order to

separate and control the harmonics，the improved filter bank was used to separate and filter the grid voltage to

achieve the effect of independent impedance simulation and harmonic output. Simulation and experiments show

that the proposed control strategy has good output effect.

      Key words：power grid simulator；linear auto-disturbance rejection；filter filtering