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.


93B35 Sensitivity (robustness)
93C70 Time-scale analysis and singular perturbations in control/observation systems
78A55 Technical applications of optics and electromagnetic theory
93C15 Control/observation systems governed by ordinary differential equations
93C05 Linear systems in control theory
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