Adaptive Resilient Secondary Control for Microgrids With Communication Faults

Area of Science:

• Electrical Engineering
• Control Systems
• Power Systems

Background:

• Distributed secondary voltage and frequency control in islanded microgrids is crucial for stability.
• Existing methods often assume ideal communication, which is unrealistic.
• Communication faults, including link failures and data attacks, pose significant challenges.

Purpose of the Study:

• To develop a communication-resilient secondary control strategy for islanded AC microgrids.
• To address the limitations of existing approaches that overlook communication faults.
• To ensure reliable operation of distributed generations (DGs) under adverse communication conditions.

Main Methods:

• A novel adaptive observer is proposed for each DG to estimate voltage and frequency references.
• The observer is designed to function under unknown communication faults.
• Sufficient conditions are derived to guarantee system stability and performance.

Main Results:

• The proposed adaptive observer effectively estimates desired references despite communication faults.
• The derived conditions ensure closed-loop stability, voltage/frequency restoration, and accurate power sharing.
• Simulation results validate the effectiveness of the resilient secondary control approach.

Conclusions:

• The developed secondary control strategy enhances the resilience of islanded microgrids against communication faults.
• The adaptive observer provides a robust solution for maintaining microgrid stability and performance.
• This work contributes to the reliable operation of microgrids in practical scenarios.