Context: Facing climate urgency, the integration of renewable energies (solar, wind) is reshaping the energy landscape. DC microgrids allow for the direct connection of these sources and storage systems without unnecessary conversions, but they introduce intermittency and stability issues.

Key Challenges: The CASIMIR project addresses three major hurdles:

• Challenge C1: Management of Isolated Units. Optimizing current distribution among multiple sources to improve efficiency without compromising voltage regulation.
• Challenge C2: Interconnection Stability. Ensuring that connecting multiple units does not destabilize the global grid, using decentralized controls.
• Challenge C3: Diversity of Architectures. Proposing systematic methods adapted to new topologies of multiport converters, which are often non-linear.

Methodology: We use a theoretical approach based on passivity and Port-Hamiltonian Systems (PCH) to guarantee stability, coupled with Control Allocation to manage actuator redundancy and optimize performance.