A robust PID controller based on imperialist competitive algorithm for load-frequency control of power systems.

Area of Science:

• Electrical Engineering
• Control Systems
• Power Systems

Background:

• Load frequency control (LFC) in power systems is critical for maintaining stable grid frequency.
• Continuous and rapid small load changes present a significant challenge for traditional LFC systems.
• Existing controllers struggle to effectively mitigate the impact of these load disturbances.

Purpose of the Study:

• To introduce a new PID controller designed for robust differential control against load disturbances in LFC applications.
• To enhance frequency regulation within individual power system areas.
• To minimize undesirable power transfer between control areas.

Main Methods:

• Development of a novel PID controller incorporating a filtering technique to eliminate load disturbance effects.
• Optimization of controller parameters using the Imperialist Competitive Algorithm (ICA) for optimal dynamic response.
• Simulation of a three-area power system in MATLAB/SIMULINK to evaluate controller performance.

Main Results:

• The proposed PID controller demonstrates superior performance in frequency regulation compared to existing methods.
• ICA effectively optimized controller parameters for a wide range of load variations.
• The filtering technique successfully mitigated the impact of small load disturbances.

Conclusions:

• The novel PID controller offers a robust solution for load frequency control, effectively addressing load disturbances.
• The Imperialist Competitive Algorithm is a viable method for optimizing LFC controller parameters.
• The proposed controller provides significant advantages over prevalent PI controllers optimized by GA and Neural Networks.