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This paper presents an active power filter based on a seven-level cascade H-bridge where the main contribution is a control strategy that combines model-based predictive control, the voltage vectors of the converter output levels, the phase shift PWM technique, and suboptimal DC-link voltage control. The proposed scheme greatly simplified the overall control system, making it well suited to compensate the current harmonics distortion at the grid side, generated by nonlinear loads connected to the point of common coupling. In addition, the proposed method achieved a balancing of the capacitor voltages of the seven-level cascade H-bridge converter by using the minimum DC-link voltage sensors. This feature significantly reduced the control system complexity and provided a low computational burden. Experimental results confirmed the feasibility and effectiveness of the proposed controller.
Raul Gregor; Julio Pacher; Alejandro Espinoza; Alfredo Renault; Leonardo Comparatore; Magno Ayala. Harmonics Compensation by Using a Multi-Modular H-Bridge-Based Multilevel Converter. Energies 2021, 14, 4698 .
AMA StyleRaul Gregor, Julio Pacher, Alejandro Espinoza, Alfredo Renault, Leonardo Comparatore, Magno Ayala. Harmonics Compensation by Using a Multi-Modular H-Bridge-Based Multilevel Converter. Energies. 2021; 14 (15):4698.
Chicago/Turabian StyleRaul Gregor; Julio Pacher; Alejandro Espinoza; Alfredo Renault; Leonardo Comparatore; Magno Ayala. 2021. "Harmonics Compensation by Using a Multi-Modular H-Bridge-Based Multilevel Converter." Energies 14, no. 15: 4698.
The development of new control techniques for multiphase induction machines (IMs) has become a point of great interest to exploit the advantages of these machines compared to three-phase topology, for example, the reduced phase currents and lower harmonic contents. One of the most analyzed techniques is the model-based predictive current control (MPC) with a finite control set. This technique presents high x–y currents because of the application of one switching state throughout the whole sampling period. Nevertheless, it is one of the most used due to its excellent dynamic response. To overcome the aforementioned drawbacks, new techniques called virtual vectors have been developed, but although there are several articles with experimental results, the algorithm for implementing the technique has not been appropriately described. This document provides a clear and detailed explanation for algorithm implementation of virtual vectors through two proposed variants VV4 and VV11, in a six-phase machine drive. The first entails lower computational cost and the second lower loss in the x–y plane. According to performance indicators such as the total harmonic distortion and the mean square error for both case studies, experimental tests were evaluated to determine the implementation’s behaviour.
Carlos Romero; Larizza Delorme; Osvaldo Gonzalez; Magno Ayala; Jorge Rodas; Raul Gregor. Algorithm for Implementation of Optimal Vector Combinations in Model Predictive Current Control of Six-Phase Induction Machines. Energies 2021, 14, 3857 .
AMA StyleCarlos Romero, Larizza Delorme, Osvaldo Gonzalez, Magno Ayala, Jorge Rodas, Raul Gregor. Algorithm for Implementation of Optimal Vector Combinations in Model Predictive Current Control of Six-Phase Induction Machines. Energies. 2021; 14 (13):3857.
Chicago/Turabian StyleCarlos Romero; Larizza Delorme; Osvaldo Gonzalez; Magno Ayala; Jorge Rodas; Raul Gregor. 2021. "Algorithm for Implementation of Optimal Vector Combinations in Model Predictive Current Control of Six-Phase Induction Machines." Energies 14, no. 13: 3857.
Modulated model predictive current control techniques are considered an interesting option to control multiphase drives due to their control flexibility and fast dynamic response. However, a practical stability study of those techniques is still missing. This paper presents an experimental stability study, to quantify the limits of stability, to modulated predictive current controllers applied to an asymmetrical six-phase induction machine. Experimental results are presented to verify the results of the theoretical analysis in terms of stability ranges regarding sampling frequency and rotor speed.
Magno Ayala; Jesus Doval-Gandoy; Osvaldo Gonzalez; Jorge Rodas; Raul Gregor; Marco Rivera. Experimental Stability Study of Modulated Model Predictive Current Controllers Applied to Six-Phase Induction Motor Drives. IEEE Transactions on Power Electronics 2021, 36, 13275 -13284.
AMA StyleMagno Ayala, Jesus Doval-Gandoy, Osvaldo Gonzalez, Jorge Rodas, Raul Gregor, Marco Rivera. Experimental Stability Study of Modulated Model Predictive Current Controllers Applied to Six-Phase Induction Motor Drives. IEEE Transactions on Power Electronics. 2021; 36 (11):13275-13284.
Chicago/Turabian StyleMagno Ayala; Jesus Doval-Gandoy; Osvaldo Gonzalez; Jorge Rodas; Raul Gregor; Marco Rivera. 2021. "Experimental Stability Study of Modulated Model Predictive Current Controllers Applied to Six-Phase Induction Motor Drives." IEEE Transactions on Power Electronics 36, no. 11: 13275-13284.
Unmanned aerial vehicles (UAVs) are affordable these days. For that reason, there are currently examples of the use of UAVs in recreational, professional and research applications. Most of the commercial UAVs use Px4 for their operating system. Even though Px4 allows one to change the flight controller structure, the proportional-integral-derivative (PID) format is still by far the most popular choice. A selection of the PID controller parameters is required before the UAV can be used. Although there are guidelines for the design of PID parameters, they do not guarantee the stability of the UAV, which in many cases, leads to collisions involving the UAV during the calibration process. In this paper, an offline tuning procedure based on the multi-objective particle swarm optimization (MOPSO) algorithm for the attitude and altitude control of a Px4-based UAV is proposed. A Pareto dominance concept is used for the MOPSO to find values for the PID comparing parameters of step responses (overshoot, rise time and root-mean-square). Experimental results are provided to validate the proposed tuning procedure by using a quadrotor as a case study.
Victor Gomez; Nicolas Gomez; Jorge Rodas; Enrique Paiva; Maarouf Saad; Raul Gregor. Pareto Optimal PID Tuning for Px4-Based Unmanned Aerial Vehicles by Using a Multi-Objective Particle Swarm Optimization Algorithm. Aerospace 2020, 7, 71 .
AMA StyleVictor Gomez, Nicolas Gomez, Jorge Rodas, Enrique Paiva, Maarouf Saad, Raul Gregor. Pareto Optimal PID Tuning for Px4-Based Unmanned Aerial Vehicles by Using a Multi-Objective Particle Swarm Optimization Algorithm. Aerospace. 2020; 7 (6):71.
Chicago/Turabian StyleVictor Gomez; Nicolas Gomez; Jorge Rodas; Enrique Paiva; Maarouf Saad; Raul Gregor. 2020. "Pareto Optimal PID Tuning for Px4-Based Unmanned Aerial Vehicles by Using a Multi-Objective Particle Swarm Optimization Algorithm." Aerospace 7, no. 6: 71.
Distributed generation systems are emerging as a good solution as part of the response to the world’s growing energy demand. In this context multi-phase wind generation systems are a feasible option. These systems consist of renewable AC sources which requires efficient and controlled power conversion stages. This work proposes a novel predictive current control strategy that takes advantage of a multi-modular matrix converter topology in the power stage of a six-phase generation system. The proposed method uses a coupling signal between the modules to decrease the error and the total harmonic distortion compared to independent control of each module. Experimental results validate the new control strategy showing the improvement regarding the target parameters.
Sergio Toledo; Edgar Maqueda; Marco Rivera; Raúl Gregor; Pat Wheeler; Carlos Romero. Improved Predictive Control in Multi-Modular Matrix Converter for Six-Phase Generation Systems. Energies 2020, 13, 2660 .
AMA StyleSergio Toledo, Edgar Maqueda, Marco Rivera, Raúl Gregor, Pat Wheeler, Carlos Romero. Improved Predictive Control in Multi-Modular Matrix Converter for Six-Phase Generation Systems. Energies. 2020; 13 (10):2660.
Chicago/Turabian StyleSergio Toledo; Edgar Maqueda; Marco Rivera; Raúl Gregor; Pat Wheeler; Carlos Romero. 2020. "Improved Predictive Control in Multi-Modular Matrix Converter for Six-Phase Generation Systems." Energies 13, no. 10: 2660.
Finite control set model-based predictive control techniques are distinguished by being an interesting alternative to traditional field oriented control techniques for multiphase drives due to their fast dynamic response and flexibility in the introduction of constraints. However, those predictive control techniques have some drawbacks regulating the (x−y) current components which can cause machine losses as well as a high computational burden. This paper presents a comparative study of an enhanced predictive current control technique with a conventional predictive control technique and two hybrid predictive control techniques applied to an asymmetrical six-phase induction motor drive in terms of current tracking, total harmonic distortion of stator currents and computational burden. Experimental results are reported to demonstrate the benefits of the different current control techniques by using the mean squared error and total harmonic distortion of stator currents as quality figures of merit and the number of floating point operations to measure the computational burden of each predictive control, thus concluding the advantages and limitations of each technique at transient and steady regimes.
Magno Ayala; Jesus Doval-Gandoy; Jorge Rodas; Osvaldo Gonzalez; Raul Gregor. Current control designed with model based predictive control for six-phase motor drives. ISA Transactions 2019, 98, 496 -504.
AMA StyleMagno Ayala, Jesus Doval-Gandoy, Jorge Rodas, Osvaldo Gonzalez, Raul Gregor. Current control designed with model based predictive control for six-phase motor drives. ISA Transactions. 2019; 98 ():496-504.
Chicago/Turabian StyleMagno Ayala; Jesus Doval-Gandoy; Jorge Rodas; Osvaldo Gonzalez; Raul Gregor. 2019. "Current control designed with model based predictive control for six-phase motor drives." ISA Transactions 98, no. : 496-504.
In applications such as multiphase motor drives, classical predictive control strategies are characterized by a variable switching frequency which adds high harmonic content and ripple in the stator currents. This paper proposes a model predictive current control adding a modulation stage based on a switching pattern with the aim of generating a fixed switching frequency. Hence, the proposed controller takes into account the prediction of the two adjacent active vectors and null vector in the ( α - β ) frame defined by space vector modulation in order to reduce the (x-y) currents according to a defined cost function at each sampling period. Both simulation and experimental tests for a six-phase induction motor drive are provided and compared to the classical predictive control to validate the feasibility of the proposed control strategy.
Osvaldo Gonzalez; Magno Ayala; Jesus Doval-Gandoy; Jorge Rodas; Raul Gregor; Marco Rivera. Predictive-Fixed Switching Current Control Strategy Applied to Six-Phase Induction Machine. Energies 2019, 12, 2294 .
AMA StyleOsvaldo Gonzalez, Magno Ayala, Jesus Doval-Gandoy, Jorge Rodas, Raul Gregor, Marco Rivera. Predictive-Fixed Switching Current Control Strategy Applied to Six-Phase Induction Machine. Energies. 2019; 12 (12):2294.
Chicago/Turabian StyleOsvaldo Gonzalez; Magno Ayala; Jesus Doval-Gandoy; Jorge Rodas; Raul Gregor; Marco Rivera. 2019. "Predictive-Fixed Switching Current Control Strategy Applied to Six-Phase Induction Machine." Energies 12, no. 12: 2294.
Pulse width modulation (PWM) strategies for the control of asymmetrical six-phase drives have been widely studied since the beginning of this century. Nevertheless, space vector modulation (SVM) techniques with multifrequency voltage injection for the control of all the degrees of freedom of the multiphase model is still a subject under research. This paper deals with this topic and introduces a generalised PWM method for a two-level voltage source converters. The architecture was derived by extending a three-phase modulator proposed as an alternative to the widely studied SVM. The proposal computes the duty times straightforwardly with a fast algorithm based on an analytical solution of the voltage-time modulation law. Theoretical derivations supported by experimental results demonstrate the proper synthesis of the multifrequency target voltage in the linear modulation region as well as good frequency behaviour of the presented modulation strategy.
Jose A. Riveros; Joel Prieto; Marco Rivera; Sergio Toledo; Raúl Gregor. A Generalised Multifrequency PWM Strategy for Dual Three-Phase Voltage Source Converters. Energies 2019, 12, 1398 .
AMA StyleJose A. Riveros, Joel Prieto, Marco Rivera, Sergio Toledo, Raúl Gregor. A Generalised Multifrequency PWM Strategy for Dual Three-Phase Voltage Source Converters. Energies. 2019; 12 (7):1398.
Chicago/Turabian StyleJose A. Riveros; Joel Prieto; Marco Rivera; Sergio Toledo; Raúl Gregor. 2019. "A Generalised Multifrequency PWM Strategy for Dual Three-Phase Voltage Source Converters." Energies 12, no. 7: 1398.
This paper proposes a robust nonlinear current controller that deals with the problem of the stator current control of a six-phase induction motor drive. The current control is performed by using a state-space representation of the system, explicitly considering the unmeasurable states, uncertainties and external disturbances. To estimate these latter effectively, a time delay estimation technique is used. The proposed control architecture consists of inner and outer loops. The inner current control loop is based on a robust discrete-time sliding mode controller combined with a time delay estimation method. As said before, the objective of the time delay estimation is to reconstruct the unmeasurable states and uncertainties, while the sliding mode aims is to suppress the estimation error, to ensure robustness and finite-time convergence of the stator currents to their desired references. The outer loop is based on a proportional-integral controller to control the speed. The stability of the current closed-loop system is proven by establishing sufficient conditions on the switching gains. Experimental work has been conducted to verify the performance and the effectiveness of the proposed robust control scheme for a six-phase induction motor drive. The results obtained have shown that the proposed method allows good performances in terms of current tracking, in their corresponding planes.
Yassine Kali; Magno Ayala; Jorge Rodas; Maarouf Saad; Jesus Doval-Gandoy; Raul Gregor; Khalid Benjelloun. Current Control of a Six-Phase Induction Machine Drive Based on Discrete-Time Sliding Mode with Time Delay Estimation. Energies 2019, 12, 170 .
AMA StyleYassine Kali, Magno Ayala, Jorge Rodas, Maarouf Saad, Jesus Doval-Gandoy, Raul Gregor, Khalid Benjelloun. Current Control of a Six-Phase Induction Machine Drive Based on Discrete-Time Sliding Mode with Time Delay Estimation. Energies. 2019; 12 (1):170.
Chicago/Turabian StyleYassine Kali; Magno Ayala; Jorge Rodas; Maarouf Saad; Jesus Doval-Gandoy; Raul Gregor; Khalid Benjelloun. 2019. "Current Control of a Six-Phase Induction Machine Drive Based on Discrete-Time Sliding Mode with Time Delay Estimation." Energies 12, no. 1: 170.
This paper presents a comparative study of two discrete nonlinear current controllers with fixed switching frequency, one based on the model predictive control and the other to robust discrete-time sliding mode, applied to a six-phase induction machine. The outer speed control is based on the proportional-integral controller. Simulation results are presented to demonstrate the performance of the two current control strategies using the mean squared error, root mean square and total harmonic distortion as figures of merit, thus concluding the advantages and limitations of each current controller at steady and transient states.
Magno Ayala; Osvaldo Gonzalez; Jorge Rodas; Raul Gregor; Yassine Kali; Pat Wheeler. Comparative Study of Non-linear Controllers Applied to a Six-Phase Induction Machine. 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC) 2018, 1 -6.
AMA StyleMagno Ayala, Osvaldo Gonzalez, Jorge Rodas, Raul Gregor, Yassine Kali, Pat Wheeler. Comparative Study of Non-linear Controllers Applied to a Six-Phase Induction Machine. 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC). 2018; ():1-6.
Chicago/Turabian StyleMagno Ayala; Osvaldo Gonzalez; Jorge Rodas; Raul Gregor; Yassine Kali; Pat Wheeler. 2018. "Comparative Study of Non-linear Controllers Applied to a Six-Phase Induction Machine." 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC) , no. : 1-6.
This work introduces a back-to-back modified T-type half-bridge (BBTHB) module for a cascaded multilevel inverter. The proposed structure generates a high quantity of levels by reducing the power electronics devices and the total blocking voltage on power switches. A detailed comparison is made with other comparable multilevel inverter structures to prove the superiority of the proposal. The performance of the cascaded BBTHB module is tested under MATLAB/Simulink software.
Mohammad Ali Hosseinzadeh; Maryam Sarbanzadeh; Elham Sarbanzadeh; Marco Rivera; Raul Gregor. Back-to-Back Modified T-Type Half-Bridge Module for Cascaded Multi-level Inverters with Decreased Number of Components. 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC) 2018, 1 -6.
AMA StyleMohammad Ali Hosseinzadeh, Maryam Sarbanzadeh, Elham Sarbanzadeh, Marco Rivera, Raul Gregor. Back-to-Back Modified T-Type Half-Bridge Module for Cascaded Multi-level Inverters with Decreased Number of Components. 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC). 2018; ():1-6.
Chicago/Turabian StyleMohammad Ali Hosseinzadeh; Maryam Sarbanzadeh; Elham Sarbanzadeh; Marco Rivera; Raul Gregor. 2018. "Back-to-Back Modified T-Type Half-Bridge Module for Cascaded Multi-level Inverters with Decreased Number of Components." 2018 IEEE International Conference on Electrical Systems for Aircraft, Railway, Ship Propulsion and Road Vehicles & International Transportation Electrification Conference (ESARS-ITEC) , no. : 1-6.
The bidirectional switch (Bi-Sw) is a power device widely used by power conversion systems. This paper presents a novel modular design of a Bi-Sw with the purpose of providing to beginner researchers the key issues to design a power converter. The Bi-Sw has been designed in modular form using the SiC-MOSFET device. The Bi-Sw uses the advantages of SiC-MOSFET to operate at high switching frequencies. The verification of the module is carried out experimentally by means of the implementation in a voltage regulating converter, where performance analysis, power losses, and temperature dissipation are performed.
Edgar Maqueda; Jorge Rodas; Sergio Toledo; Raúl Gregor; David Caballero; Federico Gavilan; Marco Rivera. Design and Implementation of a Modular Bidirectional Switch Using SiC-MOSFET for Power Converter Applications. Active and Passive Electronic Components 2018, 2018, 1 -9.
AMA StyleEdgar Maqueda, Jorge Rodas, Sergio Toledo, Raúl Gregor, David Caballero, Federico Gavilan, Marco Rivera. Design and Implementation of a Modular Bidirectional Switch Using SiC-MOSFET for Power Converter Applications. Active and Passive Electronic Components. 2018; 2018 ():1-9.
Chicago/Turabian StyleEdgar Maqueda; Jorge Rodas; Sergio Toledo; Raúl Gregor; David Caballero; Federico Gavilan; Marco Rivera. 2018. "Design and Implementation of a Modular Bidirectional Switch Using SiC-MOSFET for Power Converter Applications." Active and Passive Electronic Components 2018, no. : 1-9.
The development of digital photogrammetry solutions applied to aerial images has gained interest in recent years due to its diverse areas of application, besides the decreasing production costs of high-resolution cameras and unmanned aerial vehicles. The implementation of an automatic scene reconstruction algorithm by using a pair of aerial images as input is proposed in this paper, as a first approach to the full reconstruction algorithm with multiple images. The current work can be used for educational purposes as it contains the general method of reconstruction, excepting for the densification process, which is tested in this paper. The reconstruction algorithm is tested with pairs of aerial pictures taken from a controlled scene, in order to analyze its viability and then with aerial pictures taken with a drone.
Marcos Gomez-Redondo; Hector Fretes; Jose Rodriguez-Pineiro; Jorge Rodas; Raul Gregor. Automatic Scene Reconstruction Algorithm for Planialtimetric Applications. 2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA) 2018, 1 -6.
AMA StyleMarcos Gomez-Redondo, Hector Fretes, Jose Rodriguez-Pineiro, Jorge Rodas, Raul Gregor. Automatic Scene Reconstruction Algorithm for Planialtimetric Applications. 2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA). 2018; ():1-6.
Chicago/Turabian StyleMarcos Gomez-Redondo; Hector Fretes; Jose Rodriguez-Pineiro; Jorge Rodas; Raul Gregor. 2018. "Automatic Scene Reconstruction Algorithm for Planialtimetric Applications." 2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA) , no. : 1-6.
In the last decade, the interest in the development of unmanned aerial vehicles and the implementation of different flight topologies have been justified mainly by a wide range of applications, both military and civil. The current work can be used for educational purposes and we present two approaches in this area. The first contribution focuses on the physical design of the transition system from a tri-rotor to fixed-wing flight mode, and vice versa. Therefore, this hybrid topology will have the vertical takeoff and landing (VTOL) capability as well as improved efficiency during the flight. On the other hand, the development and analysis of the mathematical model of the hybrid system is our second contribution. A linear controller is also implemented in order to experimentally validate the performance of the proposed design.
Enrique Paiva; Marcelo Llano; Jorge Rodas; Raul Gregor; Jose Rodriguez-Pineiro; Marcos Gomez-Redondo. Design and Implementation of a VTOL Flight Transition Mechanism and Development of a Mathematical Model for a Tilt Rotor UAV. 2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA) 2018, 1 -6.
AMA StyleEnrique Paiva, Marcelo Llano, Jorge Rodas, Raul Gregor, Jose Rodriguez-Pineiro, Marcos Gomez-Redondo. Design and Implementation of a VTOL Flight Transition Mechanism and Development of a Mathematical Model for a Tilt Rotor UAV. 2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA). 2018; ():1-6.
Chicago/Turabian StyleEnrique Paiva; Marcelo Llano; Jorge Rodas; Raul Gregor; Jose Rodriguez-Pineiro; Marcos Gomez-Redondo. 2018. "Design and Implementation of a VTOL Flight Transition Mechanism and Development of a Mathematical Model for a Tilt Rotor UAV." 2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA) , no. : 1-6.
Despite all advantages of model predictive control, when this control scheme is implemented in power converters, like multilevel cascade H-bridge, it generates a variable switching frequency. This variable switching frequency can deteriorate the performance of the system. This paper examines this problem and proposes two different modulation stages to the model predictive control to solve this issue. A comparative analysis of this modulation stages with conventional predictive control, in terms of total harmonic distortion, reference tracking error, output voltages waveforms, and balance voltages on the capacitors with simulations results to validate the solutions are shown.
Leonardo Comparatore; Alfredo Renault; Julio Pacher; Jorge Rodas; Raul Gregor. Finite Control Set Model Predictive Control Strategies for a Three-Phase Seven-level Cascade H-Bridge DSTATCOM. 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA) 2018, 779 -784.
AMA StyleLeonardo Comparatore, Alfredo Renault, Julio Pacher, Jorge Rodas, Raul Gregor. Finite Control Set Model Predictive Control Strategies for a Three-Phase Seven-level Cascade H-Bridge DSTATCOM. 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA). 2018; ():779-784.
Chicago/Turabian StyleLeonardo Comparatore; Alfredo Renault; Julio Pacher; Jorge Rodas; Raul Gregor. 2018. "Finite Control Set Model Predictive Control Strategies for a Three-Phase Seven-level Cascade H-Bridge DSTATCOM." 2018 7th International Conference on Renewable Energy Research and Applications (ICRERA) , no. : 779-784.
Finite-control-set model-based predictive current control (FCS-MPCC) technique is distinguished by a variable switching frequency which causes high harmonic distortion a low sampling frequency. This latter could be considered an undesired behavior for active power filter for grid-connected applications. To overcome this issue, this paper proposes a modulated FCS-MPCC applied to a three-phase four-wire active power filter based on H-bridge converter. Simulation results are developed to demonstrate the efficiency of the proposed modulated FCS-MPCC comparing with classic FCS-MPCC, thus concluding the advantages and limitations of each technique at transient and steady states.
Alfredo Renault; Jorge Rodas; Leonardo Comparatore; Julio Pacher; Raul Gregor. Modulated Predictive Current Control Technique for a Three-Phase Four-Wire Active Power Filter based on H-bridge Two-Level Converter. 2018 53rd International Universities Power Engineering Conference (UPEC) 2018, 1 -6.
AMA StyleAlfredo Renault, Jorge Rodas, Leonardo Comparatore, Julio Pacher, Raul Gregor. Modulated Predictive Current Control Technique for a Three-Phase Four-Wire Active Power Filter based on H-bridge Two-Level Converter. 2018 53rd International Universities Power Engineering Conference (UPEC). 2018; ():1-6.
Chicago/Turabian StyleAlfredo Renault; Jorge Rodas; Leonardo Comparatore; Julio Pacher; Raul Gregor. 2018. "Modulated Predictive Current Control Technique for a Three-Phase Four-Wire Active Power Filter based on H-bridge Two-Level Converter." 2018 53rd International Universities Power Engineering Conference (UPEC) , no. : 1-6.
Finite state model predictive control methods are distinguished by a variable switching frequency which causes large current ripples at low sampling frequency. This paper presents a comparative study of two enhanced predictive current control techniques with fixed switching frequency applied to the three-wire cascaded H-bridge two level converter for active power filter applications. Simulation results are developed to demonstrate the performance of the two proposed predictive control techniques in terms of mean square error, root mean square and total harmonic distortion as figures of merit, thus concluding the advantages and limitations of each technique at transient and steady states.
Alfredo Renault; Magno Ayala; Leonardo Comparatore; Julio Pacher; Raul Gregor. Comparative Study of Predictive-Fixed Switching Techniques for a Cascaded H-Bridge Two level STATCOM. 2018 53rd International Universities Power Engineering Conference (UPEC) 2018, 1 -6.
AMA StyleAlfredo Renault, Magno Ayala, Leonardo Comparatore, Julio Pacher, Raul Gregor. Comparative Study of Predictive-Fixed Switching Techniques for a Cascaded H-Bridge Two level STATCOM. 2018 53rd International Universities Power Engineering Conference (UPEC). 2018; ():1-6.
Chicago/Turabian StyleAlfredo Renault; Magno Ayala; Leonardo Comparatore; Julio Pacher; Raul Gregor. 2018. "Comparative Study of Predictive-Fixed Switching Techniques for a Cascaded H-Bridge Two level STATCOM." 2018 53rd International Universities Power Engineering Conference (UPEC) , no. : 1-6.
This paper presents the partial shading effect on a solar photovoltaic system and proposes a circuit for scanning the power-voltage curve. In the first part of this document the partial shading effect is presented, then an experimental set-up is shown where a simple Perturb & Observe algorithm is trapped in a local point of maximum power. The next part gives design guidelines for the electronic board implementation and finally the experimental results with different power and shadow conditions are presented.
Javier Munoz; Rodrigo Aliaga; Patricio Gaisse; Hector Guerrero; Raul Gregor; Jorge Rodas. Experimental Validation of a Photovoltaic Scan Circuit for Global Maximum Power Point Tracking. 2018 IEEE ANDESCON 2018, 1 -3.
AMA StyleJavier Munoz, Rodrigo Aliaga, Patricio Gaisse, Hector Guerrero, Raul Gregor, Jorge Rodas. Experimental Validation of a Photovoltaic Scan Circuit for Global Maximum Power Point Tracking. 2018 IEEE ANDESCON. 2018; ():1-3.
Chicago/Turabian StyleJavier Munoz; Rodrigo Aliaga; Patricio Gaisse; Hector Guerrero; Raul Gregor; Jorge Rodas. 2018. "Experimental Validation of a Photovoltaic Scan Circuit for Global Maximum Power Point Tracking." 2018 IEEE ANDESCON , no. : 1-3.
The paper presents a robust sliding mode with time delay estimation method for controlling the attitude of a tri-rotor unmanned aerial vehicle (UAV) in presence of uncertainties and disturbances. The proposed control algorithm allows high accuracy tracking since a good disturbance estimation is provided using time delay estimation method and allows chattering reduction. The stability analysis of the closed-loop system is presented using the theory of Lyapunov. Finally, two numerical simulations are presented in the presence of disturbances to show the effectiveness of the proposed nonlinear control scheme.
Yassine Kali; Jorge Rodas; Raul Gregor; Maarouf Saad; Khalid Benjelloun. Attitude Tracking of a Tri-Rotor UAV based on Robust Sliding Mode with Time Delay Estimation. 2018 International Conference on Unmanned Aircraft Systems (ICUAS) 2018, 346 -351.
AMA StyleYassine Kali, Jorge Rodas, Raul Gregor, Maarouf Saad, Khalid Benjelloun. Attitude Tracking of a Tri-Rotor UAV based on Robust Sliding Mode with Time Delay Estimation. 2018 International Conference on Unmanned Aircraft Systems (ICUAS). 2018; ():346-351.
Chicago/Turabian StyleYassine Kali; Jorge Rodas; Raul Gregor; Maarouf Saad; Khalid Benjelloun. 2018. "Attitude Tracking of a Tri-Rotor UAV based on Robust Sliding Mode with Time Delay Estimation." 2018 International Conference on Unmanned Aircraft Systems (ICUAS) , no. : 346-351.
Model predictive control method has been recently introduced as an alternative to inner current controllers of multiphase drives using rotor field oriented control methods. Model predictive controllers are distinguished by a variable switching frequency which causes noise, large voltage and current ripples at low sampling frequency. Therefore, this paper proposes a variable-speed control for six-phase induction motor drives by using an inner loop of predictive-fixed switching frequency current control scheme. Experimental results are provided in order to prove the feasibility of the proposed control technique, considering mean squared error as well as the total harmonic distortion of the stator currents as figure of merit. The efficiency of the proposed control could be verified by applying the nonparametric Mann-Whitney statistical test on the experimentally obtained data.
Osvaldo Gonzalez; Magno Ayala; Jorge Rodas; Raul Gregor; Gustavo Rivas; Jesus Doval-Gandoy. Variable-Speed Control of a Six-Phase Induction Machine using Predictive-Fixed Switching Frequency Current Control Techniques. 2018 9th IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG) 2018, 1 -6.
AMA StyleOsvaldo Gonzalez, Magno Ayala, Jorge Rodas, Raul Gregor, Gustavo Rivas, Jesus Doval-Gandoy. Variable-Speed Control of a Six-Phase Induction Machine using Predictive-Fixed Switching Frequency Current Control Techniques. 2018 9th IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG). 2018; ():1-6.
Chicago/Turabian StyleOsvaldo Gonzalez; Magno Ayala; Jorge Rodas; Raul Gregor; Gustavo Rivas; Jesus Doval-Gandoy. 2018. "Variable-Speed Control of a Six-Phase Induction Machine using Predictive-Fixed Switching Frequency Current Control Techniques." 2018 9th IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG) , no. : 1-6.