RT Journal Article
T1 Fault-tolerant neutral-point-clamped converter solutions based on including a fourth resonant leg
A1 Ceballos, Salvador
A1 Pou, Josep
A1 Zaragoza, Jordi
A1 Robles, Eider
A1 Villate, José Luis
A1 Martín, José Luis
AB This paper presents a new three-level topology based on the neutral-point (NP)-clamped converter. An additional leg is added to the basic topology. The main purpose of this leg is to provide the converter with fault-tolerant capabilities. In addition, during normal operation mode, the fourth leg can be used to balance the NP voltage. In this way, the low-frequency voltage oscillations that appear in the NP under some operating conditions are cancelled out effectively. As a result, the modulation strategy of the three main legs of the converter does not have to take care of the voltage balance and can focus on other aspects such as, for instance, minimizing the switching losses of the converter. However, the inclusion of the fourth leg produces some additional losses. A resonant topology is proposed to minimize the switching losses of this leg. Three different fault-tolerant solutions based on the fourth-leg topology are presented. A comparison of these topologies showing their respective advantages and drawbacks is made. Experimental results are presented to show the viability of this approach.
SN 0278-0046
YR 2011
FD 2011-06
LK https://hdl.handle.net/11556/4080
UL https://hdl.handle.net/11556/4080
LA eng
NO Ceballos , S , Pou , J , Zaragoza , J , Robles , E , Villate , J L & Martín , J L 2011 , ' Fault-tolerant neutral-point-clamped converter solutions based on including a fourth resonant leg ' , IEEE Transactions on Industrial Electronics , vol. 58 , no. 6 , 5556001 , pp. 2293-2303 . https://doi.org/10.1109/TIE.2010.2069075
NO Manuscript received January 11, 2010; revised May 7, 2010; accepted June 28, 2010. Date of publication August 23, 2010; date of current version May 13, 2011. This work was supported in part by the Ministerio de Industria and the Ministerio de Ciencia y Tecnología of Spain under Projects CONFIA (G48870406/06), ENE2004-07881-C03-00, and ENE2007-67033-C03-00, by the Basque Country Government under SAIOTEK and EMAITEK Program, by the Torres Quevedo Program, and by the Department d’Universitats Re-cerca i Societat de la Informació of the Generalitat de Catalunya, under Grants 2004BE00105 and 2005BE00481.
DS TECNALIA Publications
RD 28 jul 2024