Design of ISE-based frequency regulation scheme for airport microgrids using FOPDT approximation and reaction curve...

Area of Science:

• Electrical Engineering
• Control Systems Engineering
• Power Systems

Background:

• Airport-centric microgrids (ACMs) face significant frequency control challenges due to dynamic load variations and islanded operation.
• Maintaining stable grid frequency is critical for reliable power supply in critical infrastructure like airports.

Purpose of the Study:

• To develop and evaluate an integral square error (ISE) based control strategy for frequency regulation in islanded ACMs.
• To compare the effectiveness of set-point tracking (SPT) and load disturbance rejection (LDR) controllers for ACM frequency control.

Main Methods:

• Linearized dynamic modeling of islanded ACMs.
• Approximation of the ACM model using a first-order plus dead time (FOPDT) model via the reaction curve method.
• Design and tuning of two PID controllers using ISE criteria for SPT and LDR objectives.
• Comparative analysis of controller performance using step responses, error indices, and time-domain measures.

Main Results:

• The SPT-oriented PID controller exhibited superior transient performance compared to the LDR-based controller.
• The SPT controller achieved a reduced cumulative frequency deviation under dynamic conditions.
• Simulations confirmed the effectiveness of the reaction curve modeling and ISE-driven tuning approach.

Conclusions:

• The proposed ISE-based control strategy, particularly the SPT-oriented controller, offers a reliable and precise method for frequency regulation in islanded ACMs.
• Integrating reaction curve modeling with ISE tuning provides an effective framework for designing robust frequency controllers for microgrids.