UPCommons - E-prints UPC Universitat Politècnica de Catalunya
(51.501 recursos)
E-prints UPC cobreix dues finalitats: per una banda, és el dipòsit institucional de la UPC que recull els articles de revista, les comunicacions de congrés i els reports de recerca generats en les activitats de recerca del personal docent i investigador de la universitat; per l'altra, és una eina que permet accelerar la producció científica, allotjant versions de documents prèvies a la publicació en una revista o a les actes d’un congrés.
Ponències/Comunicacions de congressos
Mostrando recursos 1 - 20 de 23
1.
Multilevel modular DC/DC converter for regenerative braking using supercapacitors - Massot Campos, Miquel; Montesinos Miracle, Daniel; Bergas Jané, Joan Gabriel; Rufer, Alfred
Regenerative braking is presented in many electric traction applications such as electric and hybrid vehicles, lifts and
railway. The regenerated energy can be stored for future use, increasing the efficiency of the system. This paper outlines the benefits of the MMC (modular multilevel converter) in front of the cascaded or series connection of converters to achieve high voltage from low voltage storage elements such as supercapacitors. The paper compares three different solutions and shows that the MMC can benefit from weight and volume reduction of the output inductance when shifted switching modulation strategy is used. Using this modulation strategy, not only...
2.
Dimensioning electric charging posts for PEV - Cairó, Ignasi; Cruz, Miguel; Sumper, Andreas
This paper represents a new analysis method for the estimation of the required charging infrastructure for the electric vehicles (EV’s). The study is based on a real metropolitan area, taking real data from transport habits, and a prediction of certain degree of penetration of EV’s. To cope with this analysis, is the application of powerful tools, used for example in telecommunication systems such as Markov chains, and applied here into EV’s necessities and charging stations infrastructures. This theory is applied in a real example to provide more insight on how can be applied in real circumstances.
3.
Energy management system of hybrid microgrid with energy storage - Marzband, Mousa; Sumper, Andreas; Chindris, Mircea; Tomoiaga, Bogdan
The economic scheduling of the generation units is playing a significant role in the energy management of the hybrid stand alone microgrid. Energy storage is an increasingly important part of the renewable energy sector because of the need to store power during peak production times for use in off-peak periods. This paper describes an energy
management system (EMS) for an islanded microgrid (MG) comprising wind energy conversion system (WECS),photovoltaic (PV), energy storage (ES) system, and microturbine (MT) for calculating the battery charging price (BCP) factor. To reach this objective, firstly the battery system has been modeled using the presented equations then...
5.
Fault tolerant NPC converter control for isolated PV sytems: Application for an isolated telecommunication center - Ben Abdelghani, Hafedh; Bennani Benabdelghani, Afef; Slama Belkhodja, I.; Montesinos Miracle, Daniel
Continuity operating within isolated
telecommunication sites is an important challenge. In this paper, a new fault tolerant SVM (Space Vector Modulation) strategy for 3level NPC (Neutral point Clamped) inverter used in isolated
telecommunication sites is proposed. It inssures a continuous operation of the laod after a breakdown of an inverter power
switch. Simulation results prove the good performances of the proposed srategy
6.
Power system stabiliser capability of offshore wind power plants - Domínguez García, José Luís; Gomis Bellmunt, Oriol; Bianchi, Fernando Daniel; Sumper, Andreas; Sudrià Andreu, Antoni
Nowadays, wind power generation is being located offshore because of its higher wind speed at lower height and larger installation zones in comparison with onshore technologies.
Recently, the concept of wind power plant has been introduced as a result of the increment of wind power penetration in
power systems. Transmission system operators are requiring wind power generation to help to power system with some ancillary services such as fault ride through or power system
stabiliser capability. Therefore, it is important to study power system stabiliser capability of wind power plants. In this paper, a comparison of various power system stabiliser schemes is presented....
7.
Object oriented backward/forward algorithm for unbalanced and harmonic polluted distribution systems - Tomoiaga, Bogdan; Chindris, Mircea; Sudrià Andreu, Antoni; Sumper, Andreas
The optimization in the operation of distribution
electric systems has become an acute problem. In order to
evaluate some essential criteria (e.g., active power losses) the
computation of power flow is absolutely necessary. Taking into
account the real operating conditions (unbalance, harmonics) it is
of great interest for accurate steady state estimation. The existent
solutions proposed in literature are complex and it is difficult to
implement them in unbalanced and harmonic polluted systems.
By the original adaptation of the backward/forward sweep
algorithm, the authors propose a novel paradigm to analyze the
propagation of asymmetries and harmonic distortions through
radial electric networks.
8.
Control for power conditioner based PEM fuel cell and back-up power system with supercapacitor - Trujillo Caballero, Juan Carlos; Gomis Bellmunt, Oriol; Montesinos Miracle, Daniel; Sumper, Andreas; Sudrià Andreu, Antoni; Junyent Ferré, Adrià
This paper presents a new control strategy to operate a Proton Exchange Membrane Fuel Cell (PEMFC) 1,2 kW and supercapacitor (SC) through a hybrid converter proposed. The Fuel Cell (FC) has a slow dynamic device by its nature; therefore it is recommended to have an additional auxiliary power such as the SC to improve system performance in all its applications. So has been made a study of the DC/DC converters as well as control strategies employed recently used to operate the FC and SC system. This paper shows an experimental validation of the system which has been simulated in Matlab-Simulink....
11.
Control scheme of three-level H-bridge converter for interfacing between renewable energy resources and AC grid - Pouresmaeil, Edris; Montesinos Miracle, Daniel; Gomis Bellmunt, Oriol
This paper presents a control strategy of multilevel converters for integration of renewable energy resources into power grid. The proposed technique provides compensation for active, reactive, and harmonic current components of grid-connected loads. A three-level H-bridge converter is proposed as the interfacing system between renewable energy resources and utility grid. High performance of the proposed technique is indicated with injection of maximum available power from renewable energy
resources to the power grid, increases power factor of the utility grid, and reduces the total harmonic distortion (THD) of grid current through Matlab/Simulink under proposed operating conditions.
12.
Multilevel two quadrant DC/DC converter for regenerative braking in mobile applications - Massot Campos, Miquel; Montesinos Miracle, Daniel; Galcerán Arellano, Samuel; Rufer, Alfred
In this paper different cascaded and multilevel topologies are compared for regenerative braking systems using supercapacitors (SC). It shows that the multilevel buck derived topology can beneficiate from both reduced voltage across the inductor and increased frequency to reduce the output inductance, even if there is the need for an input LC filter to reduce harmonic content in the SC. Also, the proposed control scheme is able to control the energy flow between SC and the DC bus, balancing the voltage in the SC banks. Experimental results verify the performance of the proposed converter and its control algorism.
13.
Power system stabilizer control for wind power to enhance power system stability - Domínguez García, José Luís; Gomis Bellmunt, Oriol; Bianchi, Fernando Daniel; Sumper, Andreas
The paper presents a small signal stability analysis for power systems with wind farm interaction. Power systems have damping oscillation modes that can be excited
by disturbance or fault in the grid. The power converters of the wind farms can be used to reduce these oscillations and make the system more stable. These ideas are explored to design a power system stabilized
(PSS) for a network with conventional generators and a wind farm in order to increase the damping of the oscillation
modes. The proposed stabilizer is evaluated by simulation using DigSilent PowerFactory
14.
Regulación de la calidad en la actividad de distribución eléctrica: estudio de evaluación - Santandreu Corretgé, Albert; Cruz Zambrano, Miguel; Sumper, Andreas; Sudrià Andreu, Antoni
La introducción de un factor Q dentro de la fórmula del “revenue cap” como mecanismo de
regulación de la calidad en la actividad de distribución eléctrica en España pretende eliminar los posibles efectos negativos de la regulación por incentivos. Este estudio evalúa el comportamiento del factor Q así como una simulación de los incentivos que produce, obteniendo como resultado que éste incentiva a la mejora continua de la calidad, proporciona distintos incentivos para cada empresa y produce mayores incentivos para una reducción del tiempo de las interrupciones que para una reducción de la frecuencia de éstas.
15.
FEM modeling of a continuous induction heating process of steel wire hardening - Martín Segura, Guillermo; Ferrater Simón, María Misericordia; Montesinos Miracle, Daniel; Leach, Florina; Badan, Ioan
Hardening of steel wires requires heating the wires above their Curie temperature,
temperature at which the material becomes nonmagnetic causing a sudden change
in the load. This change affects to the induction heating converters and is difficult to be evaluated due to the complexity of the problem and the interdependence of the parameters. In this paper a continuous Post-Curie wire heating model using commercial FEM software is presented and evaluated for two cases.
16.
Simple maximum power point controller for single-phase grid-connected PV system - Hafez, Ahmed A. A.; Montesinos Miracle, Daniel; Sudrià Andreu, Antoni
This paper proposes a simple and efficient PI
controller for single-phase grid-connected PV generator. The controller ensures the system operation at maximum power point
(MPP) irrespective to atmospheric conditions. A detailed design of the controller and DC capacitor were carried out. An averagevalue model was developed to facilitate the design of the controller and to study the system performance under different operation conditions. The results were validated by rigorous simulation.
17.
A remote laboratory to promote the interaction between university and secondary education - Casany Guerrero, María José; Cabrera Beán, Margarita Asuncion; Bragós Bardia, Ramon; Pérez, Marimar; Sánchez Terrones, Benjamín; Guasch Petit, Antonio; Garófano, F.; Gomis Bellmunt, Oriol; Rius Casals, Juan Manuel
iLabRS is a remote laboratory developed in Telecom
BCN, the Telecom and Electronics Engineering School of the
UPC with the key participation of a Secondary Education
Technology teacher. Students and teachers can access to real
experiments in the electronics and physics areas using a web
browser. The remote experiments have been designed to partially
cover the technology curriculum in the last two high school years
with a triple goal: (1) to enrich the set of laboratory experiences
available in High Schools, (2) to provide a clear example of the
possibilities of internet-based technologies and (3) to promote the
interaction between University and Secondary Education.
Currently, there are 13 different experiments available....
18.
GILABVIR: Virtual laboratories and remote laboratories in engineering. A teaching innovation group of interest - Cabrera Beán, Margarita Asuncion; Bragós Bardia, Ramon; Pérez, Marimar; Mariño Acebal, José Bernardo; Rius Casals, Juan Manuel; Gomis Bellmunt, Oriol; Casany Guerrero, María José; Gironella Cobos, Xavier
GILABVIR (Grup d’Interès en Laboratoris Virtuals i Remots) is a recently created Virtual and Remote Laboratory Group of Interest of UPC (Universitat Politècnica de Catalunya) and it is integrated in a more general teaching innovation project. RIMA [1], [2]. RIMA has been developed to promote research on the use of innovative learning methodologies applied to engineering education and it was specially created to assess in the new European higher education adaptation process.
19.
Induction motor with spiral sheet rotor - Mujal Rosas, Ramón María; Boix Aragonès, Oriol; Colom Fajula, Xavier
mprovements in torque at low currents using a
rotor with spiral sheets are analyzed. Several rotors and stators
have been built combining different constructive and mechanical
characteristics of the related elements : inertias, constructive
materials, geometrical shapes of the sheets and geometrical
disposition of the sheets . These different types of motors have
been simulated using computer aided tools and then tested in the
laboratory. Finally, four stators (1000, 1500, 1500-type A, and
3000 rpm) with the same constructive parameters, have been
simulated and tested with the following rotors types: solid rotor,
solid rotor with diamagnetic rings, drag cup, and simple and
double squirrel cage rotor; the results have been compared...
20.
Three-phase induction motor with spiral sheet rotor - Mujal Rosas, Ramón María; Boix Aragonès, Oriol; Marín Genescá, Marcos
Improvements on the torque with low currents using
rotor with spiral sheets are analyzed. Several rotors and stators
have been built combining different constructive and mechanical
characteristics of the related elements: inertias, constructive
materials, geometrical shapes of the sheets and geometrical
disposition of the sheets. These different types of motors have been
simulated using computer aided tools and then tested in the
laboratory. Finally, four stators (1000, 1500, 1500-type A, and 3000
rpm) having the same constructive parameters, have been simulated
and tested with the following rotors types: solid rotor, solid rotor
with diamagnetic rings, drag cup, and simple and double squirrel
cage rotor; these results have been compared to those...
1.
