Distributed Secondary Frequency Cooperation and Power Allocation in Cyber-Physical Microgrids With Multiple...

Area of Science:

• Electrical Engineering
• Control Systems
• Networked Systems

Background:

• AC microgrids require robust frequency regulation and power allocation under dynamic load conditions.
• Existing control strategies often struggle with transient stability and cyber-physical coupling.

Purpose of the Study:

• To investigate droop-controlled AC microgrids with critical constraints for transient stability.
• To develop a novel communication-network-based secondary distributed control approach.
• To guarantee bounded input-output stability for improved active power allocation.

Main Methods:

• Integration of the Kuramoto oscillator model into primary control laws.
• Development of a secondary distributed control considering diverse physical node characteristics.
• Application of invariant theory and nonquadratic Lyapunov techniques.

Main Results:

• Sufficient and necessary conditions for improved system robustness and reliability under load fluctuations.
• Establishment of cyber-physical coupling dynamics for AC microgrids.
• Guaranteed bounded input-output stability under specific conditions.

Conclusions:

• The proposed control approach significantly enhances the robustness and reliability of AC microgrids.
• The findings are validated through numerical case studies on various power systems.
• This work provides a foundation for advanced control strategies in microgrid applications.