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December 2013 - present
Publications
Publications (234)
The Quasi-Impedance-Source Inverter (Quasi-Z inverter) is an interesting DC-AC converter topology that can be used in applications such as fuel cells and photovoltaic generators. This topology allows for both boost capability and DC-side continuous input current. Another very interesting feature is its reliability, as it limits the current when two...
DC microgrids are now starting to attract huge attention from researches and engineers. Among the several DC microgrid architectures, bipolar DC microgrids are advantageous to accommodate a wider range of DC loads. However, due to mismatched loads connected to the two poles, bipolar DC microgrids may show voltage balancing issues. In this context,...
Buck-boost DC–DC converters are useful as DC grid interfaces for renewable energy resources. In the classical buck-boost converter, output voltages smaller than the input voltage (the buck region) are observed for duty cycles between 0 and 0.5. Several recent buck-boost converters have been designed to present higher voltage gains. Nevertheless, th...
This paper presents a novel analytical loss formulation to predict the efficiency of three-phase inverters using silicon carbide (SiC) metal—oxide—semiconductor field-effect transistors (MOSFETs). The proposed analytical formulation accounts for the influence of the output current harmonic distortion on the conduction losses as well as the impact o...
A new multilevel topology for an open-end winding motor drive is proposed in this paper, presenting a similar structure to the cascaded H-bridge multilevel inverter. The proposed topology combines three-phase and single-phase conventional H-bridge voltage source inverters (
VSI
). The topology is flexible, allowing to increase the number of voltag...
A novel matrix converter‐based topology to be applied in smart transformers (STs) is proposed, based on the concept of multiple modularity. To replace the conventional ST topology obtained by H‐bridge modules including DC electrolytic capacitors, the proposed ST topology uses two kinds of matrix modules to provide flexibility in the AC–AC structure...
The integration of photovoltaic (PV) power sources on a large scale into grid-tied and islanded solutions is now a reality. Despite the fluctuating characteristics of solar energy, the direct current (DC) nature of PV sources is highly compatible with DC microgrids compared with AC solutions. However, as more PV sources are being installed, challen...
This paper proposes a novel four leg matrix converter based active distribution transformer (4LMC-ADT), which aims at empowering legacy distribution transformers with on-load voltage control, a fundamental requirement for the future grid. Resorting to a four-leg direct matrix converter and a series transformer, this work shows that a traditional tr...
This paper introduces a new topology for a DC-DC converter with bipolar output and high voltage gain. The topology was designed with the aim to use only one active power switch. Besides the bipolar multiport output and high voltage gain this converter has another important feature, namely, it has a continuous input current. Due to the self-balancin...
Matrix converters have been extensively investigated in academia over the last 3 decades. Several review works targeting matrix converter topologies, commutation strategies, modulation and control techniques have been published. However, to the best of the authors’ knowledge, a review on the potential contributions of matrix converters for applicat...
In recent years, there has been a desire to improve electricity generation and consumption, to reach sustainability. Technological solutions today allow a rational use of electricity with good overall performance. Traditionally, from production to distribution, electrical energy is AC-supported for compatibility reasons and easy voltage level trans...
This paper presents a new three-phase battery charger integrated with the propulsion system of an electric vehicle. The propulsion system consists of a dual-inverter topology connected to an induction motor via open windings. The electrical vehicles (EV) batteries are divided by two inverters. This will result in a drive with multilevel characteris...
Most fuel cell electric vehicles require wide voltage-gain DC-DC converters to increase and equalize the relatively low voltage of fuel cell stacks with DC link bus or energy-storage devices, such as supercapacitors or batteries. This paper proposes two new non-isolated DC-DC converters suitable for such applications, which can be extended to other...
One of the main power quality issues that can affect variable speed drives (VSDs) is the occurrence of voltage sags on their AC power supply. Voltage sags can affect the inverter nominal operation, leading to a malfunction of the AC motor. This paper presents an inverter with resilient capability to voltage sags. The topology consists of two conven...
This paper presents the theoretical development and performance of novel Input–Output Linearization (IOL) AC voltage controllers applied to Dynamic Voltage Restorers (DVR) with Flywheel Energy Storage (FES). IOL performance is compared to decoupled proportional integral (PI) controllers, both relying on a backward Euler predictive current controlle...
This book explains the dynamic modeling, simulation, and optimization needed for hybrid electric vehicles. It presents a comprehensive overview of technologies and how they are designed, integrated, and controlled. The book begins with environmental issues and transportation history, before continuing to fundamentals of vehicle propulsion and braki...
A multilevel three-phase voltage source inverter (VSI) for distributed grid-connected photovoltaic system is proposed in this paper. This multilevel inverter is based on a new topology using three three-phase two-level VSIs (T³VSI) with isolation transformer. The photovoltaic panels are connected at the DC side of each three-phase VSI. The three-ph...
This paper discusses a novel methodology to increase the voltage droop compensation range in generalized solid-state bipolar high-voltage Marx modulators with one resonant stage. To maintain the modularity characteristic of bipolar Marx modulators, the imbedding of additional resonant stages is not straightforward. Nevertheless, this paper proposes...
n recent years, electrical energy storage (EES) became the most important technology in isolated power systems (IPS), electrical power quality, distributed energy resources, and sustainable mobility. Electric Energy Storage Systems explains the modeling, planning, and implementation methodologies of EES systems. The book’s first chapter presents an...
Microgrids are small-scale electrical networks, capable of isolated operation, that usually rely on distributed energy resources (DERs). Recent microgrids using renewable energy and distributed energy storage (DES) to help lower greenhouse gas emissions are becoming important case studies for increasing renewable energy penetration while maintainin...
In a global and growing society, it is necessary to rethink strategies in order to minimize the environmental impact resulting from the progressive increase of energy consumption and the misuse of energy resources. Energy power system converters must be considered as a global way to spare most of the wasted energy. Today, in the power distribution...
This handbook deals with emergent topics related to embedding artificial intelligence (AI) into electrical grids. Smart grids are cyberphysical-social systems, which include information and communication technology (ICT), computer-implemented human concepts and actions, sensors, controllers, distributed energy resources, and social and economic iss...
This chapter provides basic concepts and advanced technologies to generate repetitive high-voltage pulses using state-of-the-art power semiconductors. It starts with a review of power semiconductor devices used in solid-state-based high-voltage generators, including the newest silicon carbide (SiC) insulated-gate bipolar transistor (IGBT), metal-ox...
Emergent topics related to cyberphysical-social systems (CPSS) in electrical power are the subject of this book. An explanation of CPSS and highlights are included in the Foreword and Introduction, highlighting the penetration of computing and networked communications in most of the physical environments of our lives. These communications have been...
This paper describes a solid-state asymmetric bridge resonant topology to increase the energy efficiency of switching pulse modulators. The solid-state resonant topology will replace an existing pulse transformer and thyratron-based resonant modulator to supply the 60-kV target potential for the ion acceleration of the On-Line Isotope Mass Separato...
The joint conference of the 6th Euro-Asian Pulsed Power Conference (EAPPC 2016), the 21st International Conference on High-Power Particle Beams (BEAMS 2016), and the 15th International Conference on Megagauss Magnetic Field Generation and Related Topics (MEGAGAUSS 2016) was held in Estoril, Portugal, on September 18–22, 2016. It was the first time...
Two solid-state bipolar Marx modulators are analyzed and compared regarding hold-off semiconductor voltages and open-fault tolerance capability. Normal and abnormal operating conditions are considered, such as switch synchronization mismatches, failures, and open faults. Ten-stage laboratory prototypes of two bipolar Marx modulators have been assem...
This paper presents the effect of stray capacitances in bipolar (negative and/or positive) pulses generated by the two different topologies of the solid-state Marx modulators. According to the analysis, the stray capacitances influence the energy transfer from the Marx modulator capacitors to the load affecting the bipolar (negative and/or positive...
The emergent topic of periodic control (PC) is the subject of this book. The explanation of PC starts with the application of the internal model principle (IMP) control solutions for power electronics converters to track periodic inputs. The first IMP based PC solutions, called repetitive control, appeared in the 1980s and achieved an exact regulat...
This paper presents generalized dynamic models for Marx derived multilevel half-bridge bipolar modulators. This high-voltage topology uses modular Marx multilevel converter diode (M³CD) cells to generate positive and negative (bipolar) pulses or unipolar (positive or negative voltage pulses). The developed models are tested in transient studies of...
This paper presents a backward Euler stabilized-based control strategy applied to a neutral point clamped (NPC) back-to-back connected five level converters. A generalized method is used to obtain the back-to-back NPC converter system model. The backward Euler stabilized-based control strategy uses one set of calculations to compute the optimum vol...
In this paper, a hybrid DC/DC converter with a single switch and a high static gain suitable for photovoltaic applications is presented. The proposed topology combines two classical DC/DC converters, allowing an improved step-up voltage gain and the reduction of the voltage stress of all the power devices. Another feature of this topology is that i...
This paper presents a novel technique for the voltage droop compensation of long pulses in solid-state bipolar high-voltage Marx generators. Considering the modularity of Marx generators the compensation consists in adding one extra stage to perform as a pulsewidth modulation circuit. This stage voltage is added to the output positive or negative p...
In this paper, a multilevel inverter based on threephase H-bridge inverters for an open-end winding induction motor drive is presented and its fault tolerance capability investigated. The multilevel topology is obtained using three wyeconnected three-phase H-bridge inverters to supply open-end winding induction motors. This topology has the ability...
This paper presents the design and experimental voltage quality evaluation of controllers for the output voltages of 3-phase four-leg voltage source inverters. These inverters are needed in stand-Alone power systems to supply linear and non-linear, balanced or unbalanced loads with constant RMS value voltages at fixed frequency. Comparisons include...
The third edition of Microelectronic Circuits: Analysis and Design is a completely reorganized book using a top-down approach followed by the usual bottom-up approach. The objectives are twofold: 1) to study semiconductor devices, and 2) to develop students' skills in the analysis and design of analog and digital electronic circuits.
This book discloses discloses some engineering solutions that usually have no place to be published in papers about control of power electronics converters. Although it is assumed that a skilled engineer can figure out how to implement a published modulator and nonlinear controller, often, the obtained solution is not optimal and takes valuable tim...
This is an edited book with 21 chapters contributed by who created the MDA discipline. The book is divided into four parts: IEC 61499 Basics; Design Guidelines and Application Development; Industrial Application Examples; and finally, Laboratory Automation Examples. The editors did a great job with this volume, whichmay open the eyes of many who, u...
The aim of this work is to propose a strategy to guarantee Low Voltage Ride Through (LVRT) capability of a matrix converter based wind turbine without the need of additional external equipment. The proposed wind generation system is equipped with a Permanent Magnet Synchronous Generator (PMSG) and a Matrix Converter. Under normal operation conditio...
A new non-isolated DC-DC converter for photovoltaic systems is proposed in this paper. This converter topology is characterized by an integration of the classical Boost and Ćuk DC-DC converters. The proposed topology requires only a single power semiconductor switch, reduces voltage stress across diodes and power semiconductor switch while providin...
Two solid-state bipolar Marx modulators are compared in terms of semiconductors overvoltage tolerance capability in abnormal operating conditions such as switching synchronization failure. Simulation results are presented for 4 stages of two Marx circuits using 500 V per stage with 1 kHz bipolar pulse repetition rate, with 5 µs pulse width and 10 µ...
Nowadays, Electric Vehicle (EV) chargers need to guarantee fast charging and, in the scope of smart grids, they should also be able to provide ancillary services to the grid, thus allowing bidirectional power flow. As an answer to these requirements, in this work it is proposed a compact modular fast charging system allowing Grid to Vehicle (G2V) a...
Reliability is a major concern for power electronics designers spanning from industrial engineers to senior researchers. Power electronic converters' main problems can be technology infancy issues or subtle design flaws that can cause intermittent malfunctions, ruin the converter operation, or even destroy the converter. The timely and unique book-...
This paper proposes a Matrix Converter Based Active Distribution Transformer (MC-ADT) with enhanced control functionalities to be used in Smart Grids (SG). The proposed MC-ADT uses a Matrix Converter (MC) connected to a transformer inserted in series with the grid, and allows: a) real-time voltage regulation of the LV side of the MC-ADT, based on a...
This paper proposes a grid forming Modular Matrix Converter Based Solid State Transformer for smart grids. The Modular Matrix Converter Based Solid State Transformer regulates the voltage amplitude and frequency of the low voltage grid, enabling sag and swell mitigation. Each module includes a three-phase Matrix Converter, connected to a three-phas...
This book unveils the physical principles of energy-harvesting transducers and explains the necessary physics and electronics background leading to the design of energy-harvesting power supplies. It explains in detail the available energy harvesting technologies, namely piezoelectric transducers, electrodynamic microgenerators, thermoelectric gener...
Future power electronics will be dependent on recent silicon carbide power semiconductor devices like SiC metal oxide field effect transistor (MOSFET), SiC insulated gate bipolar transistor (IGBT), and SiC junction field effect transistor (JFET), capable of up to 15 kV hold-off voltages. Compared to silicon (Si), SiC-based power-switching devices p...
HVDC transmission systems based on voltage source converters have lately emerged as a good alternative to conventional AC transmission. In these transmission systems multilevel converters have become a promising energy conversion technology. The reliability of the power converters are extremely important since a fault in these equipments may lead t...
This book offers a comprehensive and systematic coverage of the operating principles, underlying theory, design, production, and use of Li-ion batteries. The text starts with a brief historical background of batteries and their terminology. Then, the book presents chapters dealing with a systematic overview of Li-ion batteries, from their chemistry...
This paper shows how to use modular Marx multilevel converter diode (M³CD) modules to apply unipolar or bipolar high-voltage pulses for pulsed power applications. The M³CD cells allow the assembly of a multilevel converter without needing complex algorithms and parameter measurement to balance the capacitor voltages. This paper also explains how to...