Browsing by Subject "Electrònica de potència"
Now showing items 1-20 of 280
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A behavioural dynamic model for constant power loads in single-phase AC systems
(2021-09-01)
Article
Open AccessConstant power loads (CPLs) in power systems have a destabilizing effect that gives rise to significant oscillations or to network collapse, motivating the development of new methods to analyse their effect in AC and DC ... -
A compact Thévenin model for a rectenna and its application to an RF harvester with MPPT
(Multidisciplinary Digital Publishing Institute (MDPI), 2019-04-06)
Article
Open AccessThis paper proposes a compact Thévenin model for a rectenna. This model is then applied to design a high-efficiency radio frequency harvester with a maximum power point tracker (MPPT). The rectenna under study consists of ... -
A comparative study of methods for estimating virtual flux at the point of common coupling in grid connected voltage source converters with LCL filter
(2017-08-23)
Article
Restricted access - publisher's policyGrid synchronization based on Virtual Flux (VF) estimation allows for control of grid-connected power converter without depending on AC-voltage measurements. This is useful in voltage-sensor-less applications for reducing ... -
A comparative study of smart THD-based fault protection techniques for distribution networks
(2023-05-01)
Article
Open AccessThe integration of Distributed Generators (DGs) into distribution systems (DSs) leads to more reliable and efficient power delivery for customers. However, the possibility of bi-directional power flow creates new technical ... -
A comparative study of terminal and conventional sliding mode start-up peak current controls for a synchronous buck converter
(Institute of Electrical and Electronics Engineers (IEEE), 2019-08-20)
Article
Open AccessAn alternative to the linear control techniques, which are based on small signal averaged models, is the sliding mode control. That method uses instantaneous models of the switched power converter to design robust controllers. ... -
A coordinated voltage regulation algorithm of a power distribution grid with multiple photovoltaic distributed generators based on active power curtailment and on-line tap changer
(2023-07-01)
Article
Open AccessThe aim of this research is to manage the voltage of an active distribution grid with a low X/R ratio and multiple Photovoltaic Distributed Generators (PVDGs) operating under varying conditions. This is achieved by providing ... -
A design-oriented combined approach for bifurcation prediction in switched-mode power converters
(Institute of Electrical and Electronics Engineers (IEEE), 2010-03)
Article
Restricted access - publisher's policyIn this brief, two different approaches are combined for studying the stability of a buck switching power dc-dc converter and for predicting its bifurcations. Instability indexes derived from both approaches are combined ... -
A fully parameterizable low power design of vector fused multiply-add using active clock-gating techniques
(Association for Computing Machinery (ACM), 2016)
Conference report
Restricted access - publisher's policyThe need for power-efficiency is driving a rethink of design decisions in processor architectures. While vector processors succeeded in the high-performance market in the past, they need a re-tailoring for the mobile market ... -
A multilevel active-clamped converter topology—Operating principle
(IEEE Press. Institute of Electrical and Electronics Engineers, 2011-09)
Article
Restricted access - publisher's policyThis paper presents a novel multilevel activeclamped converter topology, which is an extension to m levels of the three-level active neutral-point-clamped topology. The operating principle is established through the ... -
A new digital predictive predistorter for behavioral power amplifier linearization
(Institute of Electrical and Electronics Engineers (IEEE), 2007-06)
Article
Open AccessThis letter presents a new digital adaptive predistorter (PD) for power amplifier (PA) linearization based on a nonlinear auto-regressive moving average (NARMA) structure. The distinctive characteristic of this PD is ... -
A new THD measurement method with small computational burden using a SOGI-FLL grid monitoring system
(Institute of Electrical and Electronics Engineers (IEEE), 2020-06-01)
Article
Open AccessThis article proposes a new method for obtaining the total harmonic distortion (THD) using few math operations, a low-pass filter (LPF), and a grid monitoring system able to provide the fundamental and harmonics components ... -
A nonlinear time-varying map of a buck power-switching amplifier for wide band tracking applications
(Emerald, 2010)
Article
Restricted access - publisher's policyPurpose The purpose of this paper is to characterize the nonlinear dynamical behaviour of a buck-based power-switching amplifier controlled by fixed frequency and pulse width modulation with a proportional-integral ... -
A novel condition monitoring scheme for bearing faults based on Curvilinear Component Analysis and hierarchical neural networks
(2012)
Conference report
Restricted access - publisher's policyMostly the faults in electrical machines are related with the bearings. Thus, a reliable bearing condition monitoring scheme able to detect either local or distributed defects are mandatory to avoid a breakdown in the ... -
A novel three-dimensional sigma–delta modulation for high-switching-frequency three-phase four-wire active power filters
(2024-02-01)
Article
Open AccessThis article presents a new modulation technique called three-dimensional sigma–delta (3D-S¿ ) modulation for high-frequency three-leg four-wire voltage source converters (VSCs) that use wide-bandgap (WBG) semiconductors. ... -
A PLL control for self-tuning of parallel wireless power transfer receivers utilizing switch-mode gyrator emulated inductors
(2017)
Conference lecture
Open AccessIn multiple receivers wireless power transfer (WPT) systems, it is preferable to retune the resonant frequency of every receiver to the transmitter operating frequency in front of frequency mismatches. This paper discusses ... -
A power sharing algorithm for a hybrid energy storage system based on batteries
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Conference report
Open AccessThis paper presents a method to operate a hybrid Energy Storage System (ESS) based on a heterogeneous grouping of battery types. In particular, the system is composed by a lithium-ion battery pack and a lead-acid one. The ... -
A robust THD based communication-less protection method for electrical grids with DGs
(Elsevier, 2024-01-01)
Article
Open AccessIn this paper, a protection method with two cascaded algorithms is proposed to face fault events in Electrical Distribution Systems (EDSs). The first algorithm uses the Total Harmonic Distortion (THD), the estimates of the ... -
A simple approach for fast controller prototyping for a three phase interleaved DC-DC converter
(2012)
Conference lecture
Restricted access - publisher's policyInitial control prototyping in power electronics is often a matter of trial and error because of the complicated mathematics involved in modeling systems based on their internal structure. Moreover, in practice, small ... -
A simple switching frequency regulated sliding mode controller for a VSI with a full digital implementation
(Institute of Electrical and Electronics Engineers (IEEE), 2020-01-06)
Article
Open AccessThis paper describes the design of a first order sliding mode controller for a VSI operating at fixed switching frequency. The proposal is simple, as it does not include any integral or resonant action in the switching ... -
A Simple Virtual-Vector-Based PWM Formulation for Multilevel Three-Phase Neutral-Point-Clamped DC–AC Converters including the Overmodulation Region
(2022-02-01)
Article
Open AccessNeutral-point-clamped (NPC) power conversion topologies are among the most popular multilevel topologies in current industrial products and in industrial and academic research. The proper operation of multilevel three-phase ...