Control Predictivo de Torque con Inversor Multinivel Virtual y Compensación de Retardo para una Máquina Eléctrica de Inducción
##plugins.themes.bootstrap3.article.main##
Resumen
Resumen: En el presente trabajo se desarrolla un control predictivo de torque aplicado a una máquina eléctrica de inducción, asumiendo un inversor multinivel virtual y utilizando un modulador de ancho de pulsos (PWM) convencional. Por medio del modelo matemático de la máquina y en base a las mediciones de la corriente y posición angular del eje del motor y a la referencia de Torque y flujo, se realiza una primera estimación del fasor espacial de voltaje que se debe aplicar al inversor. El patrón de conmutación se calcula asumiendo que el inversor tiene un alto número de niveles. A continuación se selecciona una malla de puntos de fasores espaciales de voltaje cercanos a la primera estimación dentro del plano del inversor multinivel virtual, los cuales se los utiliza en el control predictivo. El fasor espacial de la malla de puntos que minimice la función de costo del control predictivo será usado para el cálculo de la señal de conmutación de un inversor de dos niveles por medio de un modulador de fasores espaciales. Los retardos debidos al control digital son compensados por medio de un observador. La implementación del esquema propuesto es sencilla y demuestra una alta respuesta dinámica en el par electromagnético de la máquina.
Abstract: The present paper presents a predictive torque control that assumes a virtualmultilevel inverter and utilizes a conventional pulse width modulator (PWM) for feeding aninduction machine. A first estimation of the voltage space phasor that has to be synthesizedby the inverter is computed by using the equations of the mathematical model of the machinebased on the measured currents, shaft position and on the reference value for the torque and theflux. The switching patterns are calculated by assuming that the inverter has an arbitrary highnumber of levels. By selecting a mesh of voltage space phasors close to the first calculated valueaccording to the "virtual" multilevel inverter, a cost function in a predictive control scheme isminimized. The voltage space phasor selected in this way is then used for the calculation of theswitching signals in a conventional space phasor modulator and sent to the two-level inverter.The proposed scheme results in an easy implementation and delivers good dynamics in the torque behavior.
Descargas
Descargas
Detalles del artículo
Citas
M. Morari and J. Lee, "Model predictive control: past, present and future," Computers and Chemical Engineering, 1999.
E. F. Camacho and C. Bordons, Model Predictive Control, Springer, 2003.
J. Maciejowski , Predictive Control with Constraints, Prentice-Hall, 2002.
P. Cortés, M. Kazmierkowski, R. Kennel, D. Quevedo and J. Rodríguez, "Predictive Control in Power Electronics and Drives," IEEE Transactions on industrial Electronics, Vol. 55, NO. 12„ pp. 4312-4324, Dec. 2008.
J. Rodriguez and P. Cortes, Predictive Control Of Power Converters and Electrical Drives, Singapore: John Wiley Sohns, Ltd, 2012.
R. Kennel and A. Linder, "Predictive Control of Inverter Supplied Electrical Drives," 31st IEEE Power Electronics Specialists Conference PESC, 2000.
A. Linder and R. Kennel, Model-Based Predictive Control of Electrical Drives, Germany: Cuvillier Verlag Göttingen, 2010.
I. Takahashi and T. Noguchi, "A New Quick-Response and High-Efficiency Control Strategy of an Induction Motor," IEEE Transactions on Industry Applications, Sep.-Oct. 1986.
T. Geyer, G. Papafotiou and M. Morari, "Model Predictive Direct Torque Control-Part I: Concept, Algorithm, and Analysis," IEEE Transactions on Industrial Electronics, June 2009.
G. Papafotiou, J. Kley, K. Papadopoulos and M. Morari, "Model Predictive Direct Torque Control-Part II: Implementation and Experimental Evaluation," IEEE Transaction on Industrial Electronics, June 2009.
T. Geyer, "Model Predictive Direct Torque Control: Derivation and Analysis of the Explicit Control Law," IEEE, pp. 355-362, 2011.
T. Geyer, "Model Predictive Direct Current Control," IEEE Industry Application Magazine, 2012.
G. Papafotiou, "Model Predictive DTC Computational Control Methods for MV Motor Drives," in speaker talks 2013, ETHZ, 2012.
S. Mastellone, G. Papafotiou and E. Liakos, "Model Predictive Direct Torque Control for MV Drives with LC Filters," URL: http://www.abb.com, 2012.
S. Almér, S. Mariéthoz und M. Morari, "Sampled Data Model Predictive Control of a Voltage Source Inverter for Reduced Harmonic Distortion", Control Systems Technology, IEEE Transactions on , Sep. 2012.
S. Mariethoz, A. Domahidi und M. Morari, "High-Bandwidth Explicit Model Predictive Control of Electrical Drives", IEEE Transactions on Industry Applications, pp. 1980 - 1992 , 2012.
S. Mariéthoz, A. Domahidi and M. Morari, "Sensorless Explicit Model Predictive Control of Permanent Magnet Synchronous Motors," IEEE, 2009.
C. Fischer, S. Mariéthoz und M. Morari, "Multisampled Hybrid Model Predictive Control for Pulse-Width Modulated Systems", in 50th IEEE Conference on Decision and Control and European Control Conference (CDC-ECC), Orlando, FL, USA, 2011.
W. Leonhard, Control of Electrical Drives, Germany: Springer, 2001.
U. Nu, Hochdiynamische Regelung elektrischer Antriebe, Germany: VDE Verlag GmbH, 2010.
N. P. Quang and J.-A. Dittrich, Vector Control of Three-Phase AC Machines, Germany: Springer, 2008.
P. Correa, Fault Tolerant Operation of Series Connected H-Bridge Multilevel Inverters, Siegen-Germany: Ph.D. Thesis, 2006.
M. Pacas, P. Correa and J. Rodríguez, "A Predictive Torque Control for Inverter-fed Induction Machines," IEEE, 2005.
M. Pacas, P. Correa and J. Rodríguez, "Predictive Torque Control for Inverter-Fed Induction Machines," IEEE Transaction on Industrial Electronics, April 2007.
P. Krause, O. Wasynczuk and S. Sudhoff, Analisys of Electrical Machinery and Drive Systems, IEEE Press Power Engineering Series, 2002.