Maria Angeles Martin Prats

Dr. Maria Angeles Martin Prats

Escuela Técnica Superior de Ingeniería, Electronics Engineering Department, Universidad de Sevilla, 41092 Seville, Spain
orcid

Research Focus & Metrics

Academic Career Length

27Years (2000-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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7 August 2006 in IEEE Transactions on Industrial Electronics
Verified
Journal Article
Open access
JCJuan Manuel Carrasco
Juan Manuel Carrasco
LFLeopoldo Franquelo
Leopoldo Franquelo
JBJ.T. Bialasiewicz
J.T. Bialasiewicz
EGEduardo Galván
Eduardo Galván
RPR.C. PortilloGuisado
R.C. PortilloGuisado
NMN. Moreno-Alfonso
N. Moreno-Alfonso
The use of distributed energy resources is increasingly being pursued as a supplement and an alternative to large conventional central power stations. The specification of a power-electronic interface is subject to requirements related not only to the renewable energy source itself but also to its effects on the power-system operation, especially where the intermittent energy source constitutes a significant part of the total system capacity. In this paper, new trends in power electronics for the integration of wind and photovoltaic (PV) power generators are presented. A review of the appropriate storage-system technology used for the integration of intermittent renewable energy sources is also introduced. Discussions about common and future trends in renewable energy systems based on reliability and maturity of each technology are presented

17 June 2008 in IEEE Industrial Electronics Magazine
Verified
Journal Article
Open access
LFLeopoldo Franquelo
Leopoldo Franquelo
Jose RodriguezJose Rodriguez
Jose Rodriguez
Jose I. LeonJose I. Leon
Jose I. Leon
Samir KouroSamir Kouro
Samir Kouro
RPRamon Portillo
Ramon Portillo
MPMaria Angeles Martin Prats
Maria Angeles Martin Prats
This work is devoted to review and analyze the most relevant characteristics of multilevel converters, to motivate possible solutions, and to show that we are in a decisive instant in which energy companies have to bet on these converters as a good solution compared with classic two-level converters. This article presents a brief overview of the actual applications of multilevel converters and provides an introduction of the modeling techniques and the most common modulation strategies. It also addresses the operational and technological issues.

20 October 2009 in Proceedings of the IEEE
Verified
Journal Article
Open access
Jose RodriguezJose Rodriguez
Jose Rodriguez
LFLeopoldo Franquelo
Leopoldo Franquelo
Samir KouroSamir Kouro
Samir Kouro
Jose I. LeonJose I. Leon
Jose I. Leon
RPRamón C. Portillo
Ramón C. Portillo
MPMarcelo A. Perez
Marcelo A. Perez
Multilevel converters are considered today as the state-of-the-art power-conversion systems for high-power and power-quality demanding applications. This paper presents a tutorial on this technology, covering the operating principle and the different power circuit topologies, modulation methods, technical issues and industry applications. Special attention is given to established technology already found in industry with more in-depth and self-contained information, while recent advances and state-of-the-art contributions are addressed with useful references. This paper serves as an introduction to the subject for the not-familiarized reader, as well as an update or reference for academics and practicing engineers working in the field of industrial and power electronics.

2 October 2006 in IEEE Transactions on Industrial Electronics
Verified
Journal Article
Closed access
RPR.C. Portillo
R.C. Portillo
MPMaria Angeles Martin Prats
Maria Angeles Martin Prats
Jose I. LeonJose I. Leon
Jose I. Leon
JSJ.A. Sanchez
J.A. Sanchez
JCJuan Manuel Carrasco
Juan Manuel Carrasco
LFLeopoldo Franquelo
Leopoldo Franquelo
Three-level converters are becoming a realistic alternative to the conventional converters in high-power wind-energy applications. In this paper, a complete analytical strategy to model a back-to-back three-level converter is described. This tool permits us to adapt the control strategy to the specific application. Moreover, the model of different loads can be incorporated to the overall model. Both control strategy and load models are included in the complete system model. The proposed model pays special attention to the unbalance in the capacitors' voltage of three-level converters, including the dynamics of the capacitors' voltage. In order to validate the model and the control strategy proposed in this paper, a 3-MW three-level back-to-back power converter used as a power conditioning system of a variable speed wind turbine has been simulated. Finally, the described strategy has been implemented in a 50-kVA scalable prototype as well, providing a satisfactory performance

1 December 2003 in IEEE Power Electronics Letters
Verified
Journal Article
Open access
MPManuel Perales
Manuel Perales
MPMaria Angeles Martin Prats
Maria Angeles Martin Prats
RPR. Portillo
R. Portillo
JMJ.L. Mora
J.L. Mora
Jose I. LeonJose I. Leon
Jose I. Leon
LFLeopoldo Franquelo
Leopoldo Franquelo
Four-leg inverters have been selected as one of the preferred power converter topologies for applications that require a precise control of neutral current, like active filters. The main advantage of this topology lies in an extended range for the zero sequence voltages and currents. However, the addition of a fourth leg extends the space vectors from two to three dimensions, making the selection of the modulation vectors more complex. Most of the algorithms that deal with this problem require an /spl alpha//spl beta//spl gamma/ transformation. This paper presents a new space vector modulation algorithm using abc coordinates (the phase voltages) avoiding the /spl alpha//spl beta//spl gamma/ transformation. Thanks to the use of abc coordinates, the algorithm is much simpler and more intuitive than in /spl alpha//spl beta//spl gamma/ representation, drastically reducing the complexity of modulation algorithm and the computational load associated to it.

3 April 2006 in IEEE Transactions on Industrial Electronics
Verified
Journal Article
Closed access
LFLeopoldo Franquelo
Leopoldo Franquelo
MPMaria Angeles Martin Prats
Maria Angeles Martin Prats
RPR.C. Portillo
R.C. Portillo
JGJ.I.L. Galvan
J.I.L. Galvan
MPManuel Perales
Manuel Perales
JJJ.L.M. Jimenez
J.L.M. Jimenez
In this paper, a novel three-dimensional (3-D) space-vector algorithm for four-leg multilevel converters is presented. It can be applied to active power filters or neutral-current compensator applications for mitigating harmonics and zero-sequence components using abc coordinates (referred from now on this paper as natural coordinates). This technique greatly simplifies the selection of the 3-D region where a given voltage vector is supposed to be found. Compared to a three-level modulation algorithm for three-leg multilevel converters, this algorithm does not increase its complexity and the calculations of the active vectors with the corresponding switching time that generate the reference voltage vector. In addition, the low-computational cost of the proposed algorithm is always the same and it is independent of the number of levels of the converter.