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A Structure Preserving Approach for Control of Future Distribution Grids and Microgrids Guaranteeing Large Signal Stability

This paper describes the application of the Port Controlled Hamiltonian Network for Modelling and Control of non-linear power system dynamics. Goal of this work is to propose a methodology for system level design for power electronics driven electrical networks able to guarantee large signal stability. Starting from a model-level modular approach, the system is defined using the interconnection concept. The paper focuses on a DC micro-grid scenario where several converters interact with a lumped load. Contrary to previous work, the load is modelled as a Constant Power Load (CPL) introducing new challenges in terms of system stability.