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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.

MSC:

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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