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Robust nonlinear control of shunt active filters for harmonic current compensation. (English) Zbl 1111.93014
Summary: An advanced control strategy of shunt active filters (SAF) aiming to compensate for harmonic current in the electric supply grid is proposed. The SAF considered here is suitable for three-phase three-wire current harmonic compensation and is based on AC/DC three-phase boost converter topology. Robust control of the active-reactive current/power delivered by the SAF is designed exploiting the internal model principle. The stabilization of the DC-link voltage dynamics is addressed along with the fulfillment of the harmonics compensation objective. The two-time scale behavior of the SAF is exploited to apply the averaging theory in the control design. Experiments are provided to show the effectiveness of the proposed solution.
93B35Sensitivity (robustness) of control systems
93C70Time-scale analysis and singular perturbations
78A55Technical applications of optics and electromagnetic theory
93C15Control systems governed by ODE
93C05Linear control systems