NÓBREGA, V. F.; http://lattes.cnpq.br/3060100536404792; NÓBREGA, Vágner Fonsêca.
Resumen:
The work presents a study of multilevel converters for application to Eletrical Submersible
Pumping (ESP), a method of artificial lift in oil. The multilevel converter topology is
utilized in cascade, which uses in H-bridge converters connected in series. This topology
has features like high modularity and fault tolerance that well suits the situation of the
oil. Initially it will be presented a performance analysis of the modulation strategies
applied to this converter as well as a harmonic analysis. Then the study will be directed
to the phenomenon of long cables, common in the petroleum industry. A cable model
used will be presented and simulated to evaluate the multilevel converter behavior, as
well as electing the strategy that best fits the phenomenon. Finally, it will be proposed
a technique of Selective Level Elimination (SLE), which increases the efficiency of the
system for speeds below the nominal, common situation in raising oil.