RT info:eu-repo/semantics/doctoralThesis T1 Comparative Analysis of Multilevel Converters for Medium-Voltage Applications A1 Sanz Alonso, Inés K1 Conversión de energía K1 Distribución de energía K1 Transmisión de energía K1 Electrónica K1 Electronics AB The electric energy demand has been steadily growing during the last century, and all forecasts indicate that it will keep growing in the following years. Within this frame, and due to all the problems that this demand increase generate in the environment, it is necessary improving the current techniques of electric energy conversion and transmission in order to increase the whole system efficiency. On the other hand, it is also necessary increasing the renewable energy resources exploitation through more efficient generation systems.According to these lines, the power electronics systems that have been installed in the last decades allowed to obtain better efficiency from the renewable natural resources like the wind or the solar power. These systems have also notably improved the quality of the power supplied, reducing the losses through what are known as power quality applications.Power converters are currently essential in any power electronics system. Within them, the multilevel converters specially suppose a breakthrough compared with the classical two level converters, as they allow obtaining voltage and current signals with lower harmonic content, what means fewer losses in high power medium voltage applications.In this Thesis a comparative study of some multilevel converter topologies normally used in high power medium voltage applications is done. The objective is analyzing in detail each topology and comparing it with the rest following different criteria, with the aim to know the advantages and drawbacks of each one and to realize which one is more suitable for each application. YR 2017 FD 2017 LK http://hdl.handle.net/10017/41361 UL http://hdl.handle.net/10017/41361 LA spa DS MINDS@UW RD 28-mar-2024