Variable Structure Control of a Small Ducted Wind Turbine in the Whole Wind Speed Range Using a Luenberger Observer

Diego Calabrese, Gioacchino Tricarico, Elia Brescia, Giuseppe Leonardo Cascella, Vito Giuseppe Monopoli and Francesco Cupertino
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Diego Calabrese: Department of Electrical Engineering and Information Technology, Politecnico di Bari, 70126 Bari, Italy
Gioacchino Tricarico: Department of Electrical Engineering and Information Technology, Politecnico di Bari, 70126 Bari, Italy
Elia Brescia: Department of Electrical Engineering and Information Technology, Politecnico di Bari, 70126 Bari, Italy
Giuseppe Leonardo Cascella: Department of Electrical Engineering and Information Technology, Politecnico di Bari, 70126 Bari, Italy
Vito Giuseppe Monopoli: Department of Electrical Engineering and Information Technology, Politecnico di Bari, 70126 Bari, Italy
Francesco Cupertino: Department of Electrical Engineering and Information Technology, Politecnico di Bari, 70126 Bari, Italy

Energies, 2020, vol. 13, issue 18, 1-23

Abstract: This paper proposes a new variable structure control scheme for a variable-speed, fixed-pitch ducted wind turbine, equipped with an annular, brushless permanent-magnet synchronous generator, considering a back-to-back power converter topology. The purpose of this control scheme is to maximise the aerodynamic power over the entire wind speed range, considering the mechanical safety limits of the ducted wind turbine. The ideal power characteristics are achieved with the design of control laws aimed at performing the maximum power point tracking control in the low wind speeds region, and the constant speed, power, and torque control in the high wind speed region. The designed control laws utilize a Luenberger observer for the estimation of the aerodynamic torque and a shallow neural network for wind speed estimation. The effectiveness of the proposed method was verified through tests in a laboratory setup. Moreover, a comparison with other solutions from the literature allowed us to better evaluate the performances achieved and to highlight the originality of the proposed control scheme.

Keywords: back-to-back converter topology; ducted wind turbines; energy management; Luenberger observer; variable-speed fixed-pitch wind turbines; soft stall method; wind energy conversion system (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (9)

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