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Comparación de técnicas de limitación de corriente en convertidores operando como fuentes de tensión conectados a una microrred eléctrica aislada trifásica

Authors: Lahire Gomez-Martinho, Damien;

Comparación de técnicas de limitación de corriente en convertidores operando como fuentes de tensión conectados a una microrred eléctrica aislada trifásica

Abstract

Desde hace tiempo, la red trifásica eléctrica y otras composiciones trifásicas, sufren de diferentes fallos eléctricos los cuales deben ser controlados. En el caso de este TFM, el fruto de estudio es la falla eléctrica denominada cortocircuito. Estos cortocircuitos dan una problemática la cual se estudia en este proyecto. Uno de los más importantes es el incremento considerable de las corrientes, provocando así sobrecorrientes, en el momento en el que se produce del cortocircuito. Por eso, este TFM se basa en el estudio y entendimiento de los cortocircuitos y en como mitigar, mediante técnicas de control de limitación de corriente, el efecto de estos mismos. Para ello se ha construido una mr aislada la cual se compone a partir de seis inversores de potencia, seis transformadores y una serie de inductancias para modelizar el conexionado entre los inversores. En este sistema, durante un tiempo determinado, se fuerza la interconexión entre dos fases, para provocar así un cortocircuito entre fases. Posteriormente al fuerce del cortocircuito, y tras haber estudiado las tres diferentes técnicas de limitación de corriente que se aplican, estas son implementadas, junto a toda la mr, mediante el programa Matlab/Simulink. Con ello, se deducirán cuáles son los beneficios de cada una de las técnicas de control y se detallaran cuáles son los resultados de todas las técnicas utilizadas, para que puedan ser así comparadas. Para finalizar el proyecto, se realizara la pertinente conclusión, para de forma objetiva y basándose en los datos y resultados obtenidos, concluir en cuál es la técnica que presenta mayor beneficios en términos de mitigar los efectos del cortocircuito entre fases.

For a long time, the three-phase electrical network and other three-phase compositions have been suffering from different electrical faults which must be controlled. In the case of this TFM, the object of study is the electrical fault called short-circuit. These short circuits give a problem which is studied in this project. One of the most important is the considerable increase in currents, thus causing overcurrents, at the moment when the short-circuit occurs. Therefore, this TFM is based on the study and understanding of short circuits and how to mitigate, by means of current limiting control techniques, the effect of these short circuits. For this purpose, an isolated microgrid has been built, which is composed of six power inverters, six transformers and a series of inductances to model the connections between the inverters. In this system, for a given time, the interconnection between two phases is forced, thus causing a short-circuit between phases. After forcing the shortcircuit, and after having studied the three different current limiting techniques that are used, these are implemented, together with the entire microgrid, using the Matlab/Simulink program. In this way, the benefits of each of the control techniques will be deduced and the results of all the techniques used will be detailed so that they can be compared. To close the project, the relevant conclusion will be drawn, in order to objectively and based on the data and results obtained, conclude which technique is the most beneficial in terms of mitigating the effects of shortcircuit between phases.

Country
Spain
Keywords

Armónica, Microxarxes (Xarxes elèctriques intel·ligents), Microgrids (Smart power grids), Curts circuits, Short circuits, Corriente, Corrents elèctrics, Red, Distorsión, Àrees temàtiques de la UPC::Enginyeria elèctrica::Maquinària i aparells elèctrics, Microrred aislada, Limitación, Trifásica, Electric currents, Inversor, Control

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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