Bus Voltage Deviation Automatic Compensation Control Based On Droop Control

Droop control is an important control method in microgrids with distributed power supply. However, the traditional droop control does not consider the influence of line impedance between inverters, and will affect system stability and power sharing. First analyze the traditional droop control due to the line impedance, will cause the traditional instability of sagging, resulting in circulation. Secondly, in order to improve the adaptability of the micro-power inverter to the line, a virtual impedance link is added on the basis of the traditional droop control. The virtual impedance is inductive at low frequencies and can well weaken the resistive component of the line impedance model. The power coupling, but will further reduce the voltage of the microgrid; Finally, based on this principle, the voltage compensation link is introduced according to the voltage drop principle of the power system, and a bus voltage automatic compensation method based on the droop control is proposed.