Jose Rodriguez

• Universidad Técnica Federico Santa María

Model predictive control has become a powerful and versatile control strategy, particularly effective in controlling multiphase machines. One of its key advantages is the ability to address multiple control objectives by incorporating constraints directly into the cost function. However, this feature typically necessitates the challenging task of t...

Modern multi-junction solar cell technology offers a pathway to achieving consistent and high photovoltaic conversion efficiencies through enhanced solar spectrum absorption. Indeed, during the last years, the industries of solar cells have focused on optimizing device structures, utilizing both robust and delicate materials to maximize their perfo...

In the last decades, the application of fast modern microcontrollers has been continuously growing, allowing the development and implementation of new and more intelligent control strategies as an alternative to conventional techniques for electrical machines and power converters. Model predictive control is one of these powerful and attractive alt...

This paper presents the application of a proposed hybrid control strategy that is designed to enhance the performance and robustness of a grid-connected wind energy conversion system (WECS) using a Five-Phase Permanent Magnet Synchronous Generator (FP-PMSG). The proposed approach combines the second-order terminal sliding mode control technique (SO...

Model-free predictive control (MFPC) is developed to address the issue of the weak robustness in model predictive control (MPC) based on a physical model. In predictive control algorithms, the knowledge of future values of the reference is vital and this information is conventionally obtained using the Lagrange extrapolation algorithm. However, dur...

Multilevel converters have been turned into a prominent solution for high-power, medium-voltage applications. However, controlling multilevel converters is a complex task, which is typically implemented through Single-Input Single-Output loops or via finite control set model predictive control (FCS-PC). Moreover, among the latest proposed multileve...

A hybrid microgrid system that includes photovoltaic (PV) panels, battery energy storages (BESs), and constant power loads (CPLs) is presented in this article, where threephase four-leg three-level (3P4L3L) is utilized as the main power interface. As the penetration of CPLs increases significantly, the operational stability of PV-BES Microgrids has...

This article presents a model-free predictive current control (MFPCC) with parallel cost functions for the common DC-link dual-inverter-fed open-end winding synchronous reluctance motor (OW-SynRM). The MFPCC has a general prediction algorithm that can be implemented in any reference frame. Using this feature, and the fact that each winding of the O...

Model-free predictive control (MFPC) is an essentially robust strategy in motor driving systems, garnering significant attention and research. However, the existing literature lacks a comprehensive analysis of data-driven model design, a critical aspect that directly impacts prediction accuracy and control performance of MFPC. This paper innovative...

Single switch based DC-DC converters are a fore-most requirement in many applications, so is their reliable operation. This article concerns with switch fault diagnosis using a signal based approach. Compared to many other methods such as model based or knowledge-based diagnosis, proposed signal based approach is the simplest one. This approach pre...

Gate dielectrics are essential components in nanoscale field-effect transistors (FETs), but they often face significant instabilities when exposed to harsh environments, such as radioactive conditions, leading to unreliable device performance. In this paper, we evaluate the performance of ultrascaled transition metal dichalcogenide (TMD) FETs equip...

In this paper, a new label-free DNA nanosensor based on a top-gated (TG) metal–ferroelectric–metal (MFM) graphene nanoribbon field-effect transistor (TG-MFM GNRFET) is proposed through a simulation approach. The DNA sensing principle is founded on the dielectric modulation concept. The computational method employed to evaluate the proposed nanobios...

This book chapter presents Model Predictive Control (MPC) strategies for Master-Slave parallel inverters in microgrids. The Master is a grid-forming inverter with an LC output filter, while the Slave is a grid-following inverter with an output LCL filter. The microgrid is also composed of linear and non-linear loads, as well as grid and line impeda...

In model predictive control, ensuring the accuracy and robustness of the prediction model is crucial. A Kalman filter is a self-correction method commonly used as an observer for state estimation in uncertain applications. Model-free predictive control utilizes an ultra-local model for prediction purposes. Precise measurements and feedback gains ar...

This research paper focuses on the application of a new method for the simultaneous reconfiguration and the optimum placing of Soft Open Points (SOPs) in Radial Distribution Systems (RDS). The proposed Lévy Flight-based Improved Equilibrium Optimizer (LF-IEO) algorithm enhances the standard Equilibrium Optimizer (EO) by integrating several techniqu...

An improved dual‐source SC‐MLI topology is developed in this article for medium‐voltage and high‐power applications. This topology can perform symmetrically and asymmetrically to generate 9 levels and 13 levels, respectively. It consists of 10 unidirectional switches, a dual DC source, and two capacitors to provide high‐gain output voltage with low...

The availability of recently developed medium-voltage (MV) IGBT switch modules has made the diode-free alternative topology of three-level inverters a promising option, particularly for MV applications. Diode-free three-level-based solutions possess a smaller number of components and lower conduction losses in contrast to the diode-clamped NPC inve...

Recently, event-triggered model predictive control (MPC) is addressed as a promising and powerful technique for power converter systems. The core idea behind this technique is to explicitly provide a feasible solution to reduce switching actions. However, it is prone to suffer from unknown uncertainties and large tracking error that hinder its pote...

To address the issue of weak robustness caused by parameter mismatches in model predictive control (MPC), model-free predictive control is widely adopted in motor driving systems. This approach replaces the a priori model with a data-driven model, eliminating the influence of physical parameters. However, the rotating coordinate system has various...

Deadbeat predictive current harmonics suppression method is gifted with fast dynamicity and simple mathematical model for the interior permanent magnet synchronous motors (IPMSM). However, when low-order current harmonics are suppressed and decreased, additional high-order current harmonics are produced and increased, and it deteriorates current ha...

Permanent-magnet synchronous motor drives equipped with an LC filter offer an effective solution to motor-side overvoltage issues in long cable applications, but undesired resonances are also induced. This paper presents a predictive inductor current controller (PICC) to stabilize PMSM drives with an LC filter. A baseline PICC is first designed...

Virtual synchronous generators (VSGs) demonstrate similar damping and inertia characteristics to traditional synchronous generators, thereby enhancing their ability to support grid voltage and frequency. However, VSGs face challenges related to overcurrent and power angle instability during low-voltage fault conditions. To enhance the low-voltage f...

In the position sensorless control area of permanent magnet synchronous motor (PMSM), compared with back electromotive force (EMF) method, the flux observer can realize a wider operating range because it is decoupled from speed. However, the traditional flux observer will bring about both DC bias problems caused by voltage or current detection erro...

This article presents a new iteration algorithm for the position estimation of synchronous reluctance motors by unifying the active flux observer and Newton-Raphson algorithm. Thus, a full-cycle iterative observer is derived, in which the active flux is estimated in each iteration of the Newton-Raphson technique. Hence, the dependency of the active...

This article proposes a master-slave finite control set model predictive control (FCS-MPC) for microgrids. To demonstrate it, a microgrid is considered, composed of a master neutral-point clamped (NPC) inverter with a battery energy storage system (BESS) and output LC filter; two slave NPC inverters with photovoltaic (PV) panels and output LCL...

Multilevel inverter have lately become important due to their extended application to electrical transmission and distribution systems. At the same time, the control and modulation of Multi-Level Inverters (MLIs) is especially challenging due to the high number of switching states, many of them redundant in terms of output voltage generation, and t...

This paper presents the use of Model Predictive Control (MPC) in multi-level inverters for some applications like i) wind generation and ii) photovoltaics, showing that the particular restrictions of each of them can be very easily included in the control algorithm, which is an important advantage of this technique. Another application is in modula...

VSG control has emerged as a crucial technology for integrating renewable energy sources. However, renewable energy have limited tolerance to overcurrent, necessitating the implementation of current limiting (CL)strategies to mitigate the overcurrent. The introduction of different CL strategies can have varying impacts on the system. While previous...

A Fixed-Switching-Frequency Model Predictive Control (FSF-MPC) for Master-Slave inverters in microgrids is proposed in this paper. The Master is a three-phase, two-level inverter with an LC filter, while the Slave is a three-phase, two-level inverter with an LCL filter. The inverters are connected in parallel in a microgrid, composed of different l...

Three-level T-type converter (3LT2C) with LCL filter have been widely used in renewable energy power generation system. Recent articles have shown that, due to the fractional characteristics of the inductance and capacitance of the LCL filter, the fractional-order model has higher accuracy than integer-order model in describing the static- and dyna...

This paper proposes a novel Extended Sliding-Mode Predictive Control (ESM-PC) strategy for three-phase three-level voltage source inverters (3P-3L VSIs). Initially, the control domain is established using sliding-mode theory, dynamically reducing the search space. Subsequently, a unique parallel optimization strategy is presented in the two-phase s...

Configuring an output LC filter for permanent-magnet synchronous motor (PMSM) drives can mitigate the overvoltage issues in long-distance transmission applications. However, the resulting LC-filtered PMSM system may cause an undesired resonance phenomenon, threatening the system’s stability. This article proposes a modulated predictive stator curre...

The monitoring of wind turbine (WT) systems allows operators to maximize their performance, consequently minimizing untimely shutdowns and related hazard situations while maximizing their efficiency. Indeed, the rational monitoring of WT ensures the identification of the main sources of risks at a proper time, such as internal or external failures,...

The primary objective of this paper focuses on developing a control approach to improve the operational performance of a three-level neutral point clamped (3LNPC) shunt active power filter (SAPF) within a grid-tied PV system configuration. Indeed, this developed control approach, based on the used 3LNPC-SAPF topology, aims to ensure the seamless in...

Power quality of a vehicle microgrid is seriously affected by unbalanced load. The operation of single-phase loads (unbalanced loads) will incur an imbalance problem in such a system. The power fluctuation caused by voltage imbalance endangers the system reliability and shortens its service life. Existing control methods for such problems often foc...

With the widespread application of 3LT <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> Cs, fault diagnosis has become increasingly important. Existing diagnostic methods can be divided into two types: model-driven and data-driven. Model-driven diagnosis is fast and accurate, but defining diagno...

Three-level T-type shunt active power filter (3LT <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> SAPF) has been widely used to improve the power quality of power grid under nonlinear load, and their harmonic compensation performance and reliability have been widely noticed. Model predictive co...

LC-filtered permanent magnet synchronous motor (LC-PMSM) system is suitable for long-cable drives but it has inherent resonant stability issues. This paper presents a modulated model predictive current controller with active damping (AD-M2PCC) for stabilizing the LC-PMSM drive system. First, to avoid the complex exponentiation operations in typical...

Continuous control set predictive speed control (CCS-PSC) predicts and optimizes the speed trajectory of a drive system. The prediction horizon is commonly short to avoid a high computational burden. However, stability issues may arise with the short prediction horizon. In this paper, we propose an efficient strategy that enables CCS-PSC with a lon...

Parallel T-type three-level converter (3LT <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> C) system has been widely concerned with its high-quality output current and improved efficiency in low-voltage applications. However, for parallel 3LT2 C, the power quality of the grid current should be...

Due to the harsh operating environment and complex operating conditions of electric vehicles (EVs), the physical parameters of the motor undergo nonlinear changes, leading to mismatches in both the physical model and system inertia. To address this issue, an adaptive inertia observer-based model-free predictive current control (MF-PCC) strategy is...

This is the tutorial on "New Advances and Trends in Model Predictive Control for Power Electronics and Electrical Drives" presented at the PEMD 2024 conference.

Improving the power density of multilevel converters is a crucial task, particularly in high-power applications where the volume of passive components is significant. To achieve a high number of voltage levels with minimal device count, this article presents a novel and generalized derivation method for a new family of tree-type active neutral-poin...

The performance of conventional model predictive control (MPC) applied to electric drives typically depends on the accuracy of parametric system model. However, harsh working conditions in real applications, e.g. electric vehicles and rail transportation, result in a strong time-varying effect to the parameters of motor and impact the performance o...

The control coupling and stability of three-phase photovoltaic systems with constant power loads (CPLs) are two key technical issues that urgently need to be addressed. However, current methods are difficult to solve both technical challenges simultaneously. To address these issues, this article proposes a novel decoupled continuous control set mod...

This paper investigates the performance of vacuum gate dielectric doping-free carbon nanotube/nanoribbon field-effect transistors (VGD-DL CNT/GNRFETs) via computational analysis employing a quantum simulation approach. The methodology integrates the self-consistent solution of the Poisson solver with the mode space non-equilibrium Green’s function...

Since a data-driven model is adopted to describe the operating state of the plant in the model-free predictive control, it has been widely used in the motor driving realm to eliminate the influences caused by parameter mismatches and enhance the robustness of the system. However, due to the fixed model structure and heavy calculating process, it is...

This work presents an improved structure of a single-phase muti-input multilevel inverter (MIMLI) for distributed energy resources, which is capable of producing a nine-level output in symmetric mode and 21 levels in asymmetrical mode. The topology uses four DC sources and ten switches, with four switches being bidirectional and the remaining unidi...

This article examines a new powertrain system for electric vehicles based on the dual-star induction machine, presented as a promising option due to its significant advantages in terms of performance, energy efficiency, and reliability. This system could play a key role in the evolution of electro-mobility technology. The dual-star induction machin...

Due to the advantages of smaller size and lower cost, transformerless grid-connected converter (GCC) has been widely used in photovoltaic (PV) power generation system. But this may incur obviously leakage current, which is related to the common-mode voltage (CMV) of the GCC. Topology improvement by adding additional switches is an effective way to...

A constrained predictive speed controller (CPSC) with an input current limit and a constrained predictive current controller (CPCC) with an input voltage limit are proposed for high-performance sensorless IPMSM drive systems. Recent predictive controllers for sensorless IPMSM drives tend to focus on unconstrained predictive controllers which do not...

Four-switch three-phase inverter (FSTPI) has been considered as a promising fault-tolerant topology for six-switch three-phase inverter (SSTPI) with an open-phase fault. However, the maximum linear voltage of FSTPI is reduced by half compared to SSTPI due to the reduced power switches, which limits the high-speed operation capability. In this artic...

In some applications of microgrids and distributed generation, it is necessary to feed islanded or stand-alone loads with high-quality voltage to provide low total harmonic distortion (THD). To fulfil these demands, an LC filter is usuallyconnected to the output terminals of power electronics converters. A cascaded voltage and current control loop...

In this paper, a new junctionless graphene nanoribbon tunnel field-effect transistor (JLGNR TFET) is proposed as a multi-gas nanosensor. The nanosensor has been computationally assessed using a quantum simulation based on the self-consistent solutions of the mode space non-equilibrium Green’s function (NEGF) formalism coupled with the Poisson’s equ...