Real-Time Sensorless Robust Velocity Controller Applied to a DC-Motor for Emulating a Wind Turbine

Onofre A. Morfin, Riemann Ruiz-Cruz, Jesus I. Hernández, Carlos E. Castañeda, Reymundo Ramírez-Betancour and Fredy A. Valenzuela-Murillo
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Onofre A. Morfin: Departamento de Eléctrica y Computación, Instituto de Ingeniería y Tecnología, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez 32310, Mexico
Riemann Ruiz-Cruz: Laboratorio de Investigación en Diseño Optimo, Dispositivos y Materiales Avanzados (OPTIMA), Departamento de Matemáticas y Física, ITESO, Tlaquepaque 45604, Mexico
Jesus I. Hernández: Departamento de Eléctrica y Computación, Instituto de Ingeniería y Tecnología, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez 32310, Mexico
Carlos E. Castañeda: Departamento de Ciencias Exactas y Tecnología, Centro Universitario de los Lagos de la Universidad de Guadalajara, Lagos de Moreno 47460, Mexico
Reymundo Ramírez-Betancour: División Académica de Ingeniería y Arquitectura, Universidad Juárez Autónoma de Tabasco, Cunduacán 86040, Mexico
Fredy A. Valenzuela-Murillo: División Académica de Ingeniería y Arquitectura, Universidad Juárez Autónoma de Tabasco, Cunduacán 86040, Mexico

Energies, 2021, vol. 14, issue 4, 1-15

Abstract: The wind power systems of variable velocity using a doubly-fed induction generator dominate large-scale electrical generation within renewable energy sources. The usual control goal of the wind systems consists of maximizing the wind energy capture and streamlining the energy conversion process. In addition, these systems are an intermittent energy source due to the variation of the wind velocity. Consequently, the control system designed to establish a reliable operation of the wind system represents the main challenge. Therefore, emulating the operation of the wind turbine by means of an electric motor is a common strategy so that the controller design is focused on the induction generator and its connection to the utility grid. Thus, we propose to emulate the dynamical operation of a wind turbine through a separately excited DC motor driving by a sensor-less velocity controller. This controller is synthesized based on the state-feedback linearization technique combined with the super-twisting algorithm to set a robust closed-loop system in the presence of external disturbances. A robust velocity observer is designed to estimate the rotor velocity based on the armature current measuring. Furthermore, a robust differentiator is designed for estimating the time derivative of the velocity error variable, achieving a reduction in the computational calculus. Experimental tests were carried using a separately excited DC motor coupled with a dynamometer to validate the proposed wind turbine emulator.

Keywords: sensorless velocity controller; super-twisting algorithm; wind turbine emulation (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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