Performance optimization of linear active disturbance rejection control approach by modified bat inspired algorithm...

Area of Science:

• Electrical Engineering
• Control Systems
• Renewable Energy Systems

Background:

• Load frequency control (LFC) is critical for power system stability, especially with increasing wind energy penetration.
• Wind power systems, particularly those using doubly fed induction generators, introduce complexities due to variable generation and system uncertainties.
• Maintaining power balance requires robust control strategies that can reject both internal uncertainties and external disturbances.

Purpose of the Study:

• To develop and validate a novel control strategy for load frequency control in single-area wind power systems.
• To enhance the performance and robustness of the control system against dynamic wind variations and system uncertainties.
• To optimize controller parameters using an efficient metaheuristic algorithm for improved stability.

Main Methods:

• Linear Active Disturbance Rejection Control (LADRC) framework utilizing an extended state observer (ESO) for real-time disturbance estimation and compensation.
• A modified bat-inspired algorithm for optimizing the performance index, tuning observer and controller bandwidths.
• Extensive simulations on a single-area power system model with varying wind penetration levels and external disturbances.
• Monte-Carlo simulations to assess robustness against parameter variations.

Main Results:

• The proposed LADRC approach effectively estimates and compensates for total disturbances, including unmodeled dynamics and external factors.
• Controller parameter tuning is simplified through bandwidth optimization, achieved via the bat-inspired algorithm.
• Simulations demonstrate superior performance and robustness compared to conventional Proportional Integral (PI) and Fuzzy-Proportional Integral (Fuzzy-PI) controllers.
• The approach maintains stability and power balance under high wind penetration and parameter uncertainties.

Conclusions:

• The developed LADRC strategy offers an effective solution for load frequency control in wind power systems.
• The bat-inspired algorithm provides an efficient method for optimizing the controller parameters.
• The proposed method demonstrates significant advantages in performance, robustness, and disturbance rejection capabilities over existing control techniques.