Robust Control of Standalone DC Microgrids under Pulsed Loads: Stability Analysis of a Hybrid LADRC-PI Scheme
Conference
Aghmadi, A, Hossain Rafin, SMS, Mohammed, OA. (2025). Robust Control of Standalone DC Microgrids under Pulsed Loads: Stability Analysis of a Hybrid LADRC-PI Scheme
. 10.1109/DMC65958.2025.11475311
Aghmadi, A, Hossain Rafin, SMS, Mohammed, OA. (2025). Robust Control of Standalone DC Microgrids under Pulsed Loads: Stability Analysis of a Hybrid LADRC-PI Scheme
. 10.1109/DMC65958.2025.11475311
The integration of high-density loads such as data centers into standalone DC microgrids introduces significant control challenges due to their repetitive, high-power demand, also known as pulsed load behavior. These disturbances can cause substantial voltage fluctuations and degrade system stability if not effectively managed. This paper proposes a hybrid control strategy combining Linear Active Disturbance Rejection Control (LADRC) with a Proportional-Integral (PI) controller to improve the resilience and voltage regulation of a standalone DC microgrid under such conditions. The LADRC is employed in the outer voltage loop to estimate and compensate for total disturbances-including those from load variations- via a Linear Extended State Observer (LESO), while the PI controller is implemented in the inner current loop to ensure smooth and stable current dynamics. The hybrid control system is evaluated against a traditional PI-PI control scheme. Comparative simulation results reveal that the proposed LADRC-PI scheme outperforms conventional methods in suppressing voltage deviations, improving transient response, and enhancing robustness to load disturbances. The study offers a promising direction for resilient microgrid control in modern critical infrastructure environments.
