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Publications (306)
DC current injection is a common problem in grid-tied inverters and it is especially emphasized when current transformers are employed to sense the current. Although the dc current elimination is already addressed for linear controllers, it is not faced for model predictive control. This manuscript proposes a dc current elimination strategy for cas...
This article develops a gradient-based search algorithm for selective harmonic elimination (SHE) to address the problems of high-computational cost, low-convergence speed, modulation index error, and slow-dynamic response often associated with SHE algorithms. First, the dimension of the search space is reduced by deriving intuitive equations to inc...
The effects of DC source voltage unbalance on the CHB inverter, if not properly managed, reduce the efficiency of the whole power system and generate unwanted harmonics in the output voltage with increased THD. In this paper, an SHE technique operating at the fundamental frequency has been proposed for unbalanced five-level CHB inverters to fix the...
Lithium-ion (Li-ion) batteries are the preferred choice for energy storage applications. Li-ion performances degrade with time and usage, leading to a decreased total charge capacity and to an increased internal resistance. In this article, the wavelet analysis is used to filter the voltage and current signals of the battery to estimate the interna...
This article proposes a series of high-step-up interleaved dc–dc converters utilizing coupled inductors and quadratic voltage gains. The first proposed converter is a modified version of the Dickson-based converter, which offers a higher voltage gain compared to the modified Dickson converter while maintaining common ground. The second proposed con...
To enhance tracking performance and accuracy of linear motor (LM) systems, it is essential to consider the main system uncertainties, such as parameter variations, unmodeled dynamics, and external disturbances, in the control algorithm design. This article proposes a novel motion control scheme based on the utilization of an integral sliding mode o...
In this paper, a high voltage gain hybrid interleaved DC‐DC converter (HIC) with quadratic voltage gain is proposed that is suitable for renewable energy systems. The hybrid technique is used in this converter to increase the output voltage. The proposed DC‐DC converter utilizes the interleaved boost converter on the input side, and the input curre...
First International Conference on Artificial Intelligence and Green Energy
Finite Control Set Model Predictive Control appears an interesting and effective control technique for Cascaded H-Bridge converters but, because of its computational complexity, becomes impractical when the number of levels of the converter increases. This paper proposes a Neural Network-based approach capable of overcoming the computational burden...
This paper studies the extraction of an equivalent resistance for calculation of the switching power losses in cascaded H-bridge multilevel inverters with unipolar pulse width modulation. The concept of local and global rms currents and switching power losses are introduced in each H-bridge considering different frequencies of the inverter output a...
It is a pleasure to invite you to submit yours scientific contribution to IEEE ICAIGE 2023 technical co-sponsored by IEEE and IES and organized by the Tunisian Association of Renewable Energy (ATER) and the University of Sousse.
The conference aims to gather researchers, academics, scientists and professionals worldwide to present and discuss the...
Due to the full-wave AC–DC power conversion, second-order frequency oscillations of current and voltage are created in single-phase PV-grid-connected inverters. These oscillations propagate toward the input and adversely affect the PV power utilization ratio. Large power decoupling capacitors are the preliminary solution for coping with voltage rip...
The CHBMI performance optimization can be
reached both with hardware and software solutions. Generally,
asymmetrical configurations allow the extension of the voltage
levels number and the implementation of an innovative
modulation strategy allows for improving the performance in
terms of harmonic distortion and conversion efficiency. This
work is...
A recursive method that eliminates
n
+1 harmonics and their respective multiples from the output voltage of a cascaded H-bridge multilevel inverters with
s
= 2
<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> n </sup>
dc sources (
n
= 1, 2, 3,...) is proposed. It solves 2×2 linear systems with not...
In this paper, a software-based resolver to digital
converter (RDC) is proposed. The hardware signal conditioning
circuit is realized using common electronic components, while
the algorithm can be implemented either using a
microcontroller or an FPGA. Its validation and performance
analysis has been carried out using an interior permanent
magnet sy...
In this paper, a new active impedance source inverter with a suitable control method based on the pulse‐width modulation (PWM) technique is proposed. Based on the proposed control method, the analysis of the proposed inverter in different operating modes is given, and its boost factor is calculated. Then, the fundamental equations to design the val...
In this paper multilevel cascaded H-bridges
(CHB) three phase inverters with 2n dc sources, n = 1, 2, 3, ...
are considered and a mathematical formulation providing both
2n switching angles and dc voltage source to eliminate n + 1
harmonics and their respective multiple from their output voltage
waveform, is proposed. The computed angles don’t depe...
Electrical drives fed by Multilevel Inverters (MIs)
are of considerable interest for traction and e-mobility
applications. In detail, Cascaded H-Bridge Multilevel Inverter
(CHBMI) is a promising solution for electrical drive
optimization purposes in terms of efficiency, safety, integration
and flexible use of energy sources. The aim of this paper i...
The effects of voltage unbalancing on total harmonic
distortion and on output voltages in cascaded H-bridge inverters
are considered in the case of five and seven level cascaded Hbridges
inverters fed by unequal dc voltage sources. Three phase
output voltages are expanded in terms of Fourier system of
equations then, obtained series is solved throu...
We consider the tracking control problem for a class of stochastic nonlinear systems in strict-feedback structure via output feedback signal in this article. The controlled plant is assumed subject to unknown dead-zone input. By utilizing the fact that the unknown dead-zone input function can be modeled as a time-varying nonlinear function and a bo...
This paper considers l-level cascaded H-bridge inverters and proposes a new modulation method based on pulse active width modulation, capable to minimize all harmonics with order n < 2 l +1 and to satisfy the European harmonic standards for medium-voltage level applications EN 50160 and CIGRE WG 36-05. A mathematical theorem and its proof are prese...
Contouring control is one of the most important tasks for the dual-linear-motor-driven gantry system (DLMDGS), whose control performance determines the in various precision machining equipment, mainly industrial machine tools. Nevertheless, there are some limitations in present results, including the insufficient consideration of system uncertainty...
Model predictive current controller is a popular and effective technique to provide fast dynamic response in the field of motor control. However, conventional predictive controllers are susceptible to deteriorating control performance when model mismatch exists, such as changes in motor parameters due to the temperature variations. Therefore, this...
Recent advancements in renewable energy technologies including dramatic improvement in cost-effectiveness and reliability have driven wide deployment of renewable energy sources in the modern electric grid across the globe. Among the renewable energy sources, solar photovoltaic (PV) is the most widely used. For the solar PV system, the dc input of...
Compared to conventional multilevel topologies, the Packed U-Cell multilevel topology utilizes the minimum number of components and provides both maximum voltage levels and high reliability. When used in a battery energy storage system, its dc-link consists of a top branch battery storage and bottom branch flying capacitors, whose state of charge a...
Abstract Here, a single‐input, dual output (SIDO) coupled inductor‐based high voltage conversion ratio DC–DC converter is proposed. The proposed converter has the capability of operating as a SIDO converter in a way that the terminal of the input voltage source is exchangeable among the three ports. Therefore, there are three different operation mo...
Modulation using a higher sided polygonal space vector structure (SVS) is an elegant method to increase the linear modulation range and to eliminate the undesired lower order harmonics from motor phase voltage. This article presents the generation of a dense 15-concentric 30-sided multilevel SVS using a single dc-link for an open end induction moto...
In this paper, a novel single-loop flatness-based controller (FBC) is proposed to control the grid-side current in a shunt converter connected to a weak grid through an LCL-filter. After its mathematical description, the paper reports controller implementation and some performance comparisons with two distinct implementations of the widely diffused...
In this study, a non‐isolated three‐port high step‐up/step‐down DC–DC converter is proposed. The proposed converter has the capability of cancelling the input current ripple in the high current port, moreover, the voltage conversion ratios between the high voltage and low voltage are increased by coupled inductors. All the ports of the proposed con...
The development of high-frequency power converters is continuously improving their power density, efficiency and fast dynamic response. Among them, high-voltage-conversion-ratio dc-dc converters are widely used in high gain, i.e. step-up/-down or bidirectional applications, such as power supply for data center, dc micro-grids, electrical vehicle ch...
Electrification is a remarkable trend in the aviation industry. Electric machines and power electronics systems have been increasingly embedded in aerospace applications. In this field, the abovementioned systems are mainly used for flight control, engine starting/generating, propulsion, environmental control, braking, and fuel and hydraulic pumps.
As an emerging research topic, wireless power transfer (WPT) with a single transmitter for multiple pickups (STMP) shows salient advantages of reducing the number of power inverters, increasing the power density, and so on, which has profound implications for various applications, such as wireless charging for electric vehicles (EVs) and smart home...
In modern aircrafts, hydraulic or pneumatic actuators have been already replaced with electric counterparts, but the advancement of the inverter and motor technology has made possible that the propulsion system can be powered by electrical sources. These high power requirements can not be efficiently fulfilled by using a typical two level converter...
Modular multilevel cascaded converters prove to be well-suitable for high and medium voltage systems due to their lower cost and high-redundance design. For STATCOM, Single-Star Bridge-Cell (SSBC) topology is well applied for its satisfactory performance and superior component count. Multilevel SSBC-STATCOM control is composed of three layers which...
This paper presents an extensive simulation-based and experimental validation of One-Cycle Control (OCC) over a nine-level power inverter using Cyclone III FPGA from Intel. OCC is a technique that exploits the nonlinear nature of multilevel power converters to overcome issues such as fast dynamic response, robustness and perturbations on either the...
This paper considers cascaded H-bridges multilevel inverters with 2 n dc sources, n integer, n > 0 and proposes a new general formula to compute those 2 n switching angles capable of eliminating n + 1 harmonics and their respective multiples from the output voltage waveform. The proposed procedure uses only scalar products and avoids linear systems...
In this paper, a non-isolated three-port DC-DC converter with high voltage conversion ratio is proposed. In the proposed converter, by changing the place of input voltage source between each of the three ports, three different single-input two-output operation modes are achieved. The input current ripple of the proposed converter is eliminated at t...
In this paper, a single phase cascaded H-bridge inverter with s variable dc sources (s≥2), l=2s+1 levels has been considered. A mathematical proof is presented to demonstrate that, under a particular choice of the switching angles, which number corresponds to the number of dc sources i.e. s, and of the dc voltages, all harmonics are eliminated from...
In this paper, a single-phase cascaded H-bridge (CHB) multilevel inverter having s DC sources and a number of levels l = 2s + 1 with s = 2nn = 1, 2, 3, … is considered, and a method to eliminate n + 1 harmonics and their respective multiple from its output voltage waveform is presented. The proposed procedure is compared with the conventional selec...
Special Section on: High-Frequency High-Voltage-Conversion-Ratio DC/DC Converters Recently, high-frequency power electronics technology has developed rapidly, which helps to improve power density and dynamic response. Among high-frequency DC/DC converters, the high-frequency high-voltage-conversion-ratio DC/DC converters are widely adopted in many...
With the advent of SiC devices, the packed U-Cell converter has become a promising topology among the multilevel converters for medium voltage DSTATCOM application. It utilizes fewer components while achieving the maximum voltage levels with higher reliability. However, as a reactive power compensator, its dc-link consists of flying capacitors, who...
Multilevel converters prove to be well-suitable for high and medium voltage systems due to their lower cost and high-redundance design. For STATCOM, Single-star Bridge-cell (SSBC) topology is well applied for its satisfactory performance and superior component count. However, when number of levels increases, more switches are required to be paralle...