Fault-tolerant hybrid four-leg multilevel converter

Author

Ceballos, Salvador ; Pou, Josep ; Robles, Eider ; Zaragoza, Jordi ; Ibáñez, Pedro ; Martín, José Luis

Author_Institution

ROBOTIKER TECNALIA Technologic Corp., Zamudio

fYear

2007

fDate

2-5 Sept. 2007

Firstpage

1

Lastpage

9

Abstract

In this paper a modification of the neutral-point-clamped (NPC) converter, in which a fourth leg has been added, is presented. The main aim of this additional leg is to increase the reliability of the converter and thereby allow it to continue operating when a breakdown in one of the IGBTs occurs. In addition, during normal fault-free operation, the fourth leg also guarantees a correct control of the neutral point voltage, removing completely the low frequency voltage oscillations. A simple and computationally efficient control scheme is proposed for this purpose.

Keywords

power convertors; reliability; voltage control; fault-tolerant hybrid four-leg multilevel converter; neutral point voltage control; neutral-point-clamped converter; reliability; Capacitors; Costs; Fault tolerance; Frequency; Industrial electronics; Leg; Low voltage; Semiconductor diodes; Topology; Voltage control; Modulation strategy; Multilevel converters; Reliability; Wind energy;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications, 2007 European Conference on

Conference_Location

Aalborg

Print_ISBN

978-92-75815-10-8

Electronic_ISBN

978-92-75815-10-8

Type

conf

DOI

10.1109/EPE.2007.4417617

Filename

4417617