New power sharing control for inverter-dominated microgrid based on impedance match concept

Area of Science:

• Electrical Engineering
• Power Systems
• Control Systems

Background:

• Accurate power flow control is essential for inverter-dominated autonomous microgrids.
• Traditional P-F and Q-V droop controls exhibit poor power sharing with unequal line impedances.

Purpose of the Study:

• To address the challenge of accurate active/reactive power sharing in microgrids.
• To propose a novel droop control strategy based on impedance matching.

Main Methods:

• Comprehensive analysis of existing power droop control schemes.
• Development of a new droop control leveraging the impedance match concept.
• Provision of design guidelines for control coefficients and virtual impedance.

Main Results:

• The proposed impedance-matched droop control significantly enhances power sharing accuracy.
• Design guidelines facilitate optimal tuning of control parameters and virtual impedance.
• Performance evaluation validates the effectiveness of the novel control method.

Conclusions:

• The impedance-matched droop control offers a superior solution for power sharing in microgrids.
• This method effectively mitigates issues caused by unequal line impedances.
• The study provides practical design insights for microgrid power control.