Proposal of an interleaved boost converter controlled by a nonlinear MPPT ADRC as the boost stage of a solar inverter connected to the hospital electrical network

• Proposed an interleaved DC-DC boost converter for improved energy conversion efficiency in hospital solar systems. • Developed a nonlinear MPPT-ADRC control strategy, enhancing system performance and stability under dynamic solar conditions. • Achieved significant reductions in current and voltage ripple, ensuring compliance with strict NFC15-211 standards. • Validated the proposed design using Matlab/Simulink simulations, including scenarios with extreme solar irradiation fluctuations; demonstrated superior performance versus conventional PID-GA controllers. • Outlined future research directions, including extension to inverter control stages and microgrid architectures for decentralized hospital energy management. This paper addresses the integration of renewable energy into hospital electrical networks, focusing on enhancing system reliability, efficiency, and compliance with stringent standards such as NFC15–211. Hospitals are critical infrastructures with high energy demands and require uninterrupted power for vital equipment. To address these challenges, we propose an innovative solution combining an interleaved DC-DC boost converter with a nonlinear MPPT-ADRC control strategy. The interleaved architecture reduces current and voltage ripple, improving energy conversion efficiency, while the robust ADRC control compensates for system disturbances and enhances stability under fluctuating solar irradiation. Simulation results demonstrate significant improvements in DC output quality and AC performance compared to conventional PID-GA-controlled systems, particularly under extreme operational conditions. Furthermore, the system design includes redundancy features to ensure continuous operation in fault scenarios, crucial for hospital environments. Future work will extend this control strategy to the inverter stage and explore transitioning to a microgrid architecture, aiming to enhance decentralized energy management and optimize renewable energy integration for sustainable and resilient hospital networks.