Control of grid forming inverter based on robust IDA-PBC for power quality enhancement

This paper deal with power quality issues in weak voltage isolated micro-grids, where the power export is managed through an inverter connected via an LC filter to feed the local consumers. In this context, a robust Interconnection and Damping Assignment Passivity-Based Controller (IDA-PBC) with an integral action is proposed to cope with undesired disturbances and uncertainties. The synthesis methodology of this kind of control is based on Hamiltonian modeling where the objective is to minimize a desired energy function that guarantees a stable and robust control of the system in a closed-loop. The design steps of the proposed control are provided and its effectiveness is shown through comparative experimental tests between a classical PI controller and an IDA-PBC controller. •Control of grid forming inverter for standalone application is investigated.•The system is described by Port-Control Hamiltonian (PCH) formalism.•An IDA-PBC-IA is designed to improve the stability and robustness of the system.•The goal is to improve the power quality under different load conditions.•Comparative experimental tests show the effectiveness of the proposed control.