Title :
A comparison of efficiency for three-level NPC and Active NPC voltage source converters
Author :
Floricau, Dan ; Popescu, Claudia-Laurenta ; Popescu, Mihai-Octavian ; Floricau, Elena ; Spataru, Lucian
Author_Institution :
Fac. of Electr. Eng., Politeh. Univ. of Bucharest, Bucharest, Romania
Abstract :
The 3L-NPC (three-level Neutral-Point-Clamped) is the most popular multilevel converter used in high-power medium-voltage applications. An important disadvantage of this structure is the unequal distribution of losses among the switches. The performances of 3L-NPC structure were improved by developing the 3L-ANPC (Active-NPC) converter which have more degrees of freedom. In this paper the switching states are studied for different PWM strategies. A numeric calculus method for the total losses in switches was also presented in order to compare the efficiency for the 3L-NPC and 3L-ANPC converters. The PSIM simulation results are shown in order to validate the analysis of the switching states.
Keywords :
PWM power convertors; active NPC; different PWM strategies; neutral-point-clamped; switching states; three-level NPC; voltage source converters; Analytical models; Calculus; Clamps; Pulse width modulation; Semiconductor diodes; Switches; Switching converters; Switching frequency; Topology; Voltage;
Conference_Titel :
Compatibility and Power Electronics, 2009. CPE '09.
Conference_Location :
Badajoz
Print_ISBN :
978-1-4244-2855-7
Electronic_ISBN :
978-1-4244-2856-4
DOI :
10.1109/CPE.2009.5156055
