Comparison of the voltage and frequency control schemes for voltage source converter in autonomous microgrid

The VF (voltage and frequency control) droop control techniques are used to set the VF reference value which allows the operation of multiple VSCs in parallel to share the loads and regulate system voltage and frequency separately. In this paper, the characteristics of four VF control strategies which are: open loop VF control; VF control scheme with voltage feedback in abc reference frame; VF control scheme with voltage feedback in dq reference frame; VF control scheme with voltage and frequency feedback were presented.