Complex Coefficient Droop Control with High Bandwidth Inner Voltage Loop

This article proposes an improved droop control method based on complex droop coefficient with high bandwidth complex variable inner voltage control, which simplifies the design process of the inner voltage control by using complex variables and eliminates the slow dominant pole introduced by the controller by introducing feedforward control. Based on the high bandwidth voltage inner loop, the power control of the outer loop adopts complex coefficient droop control, which considers the coupling of active power and reactive power caused by line impedance, which makes the power flow have a more ideal direction.