TY - GEN
T1 - Regenerative medium-voltage AC drive based on a multi-cell arrangement with minimum energy storage requirements
AU - Pérez, Marcelo A.
AU - Espinoza, José R.
AU - Rodríguez, José R.
AU - Lezana, Pablo
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2002
Y1 - 2002
N2 - Multi-cell power circuit topologies have probed to be an effective alternative to medium-voltage ac drives. Commercial units are built up based on modular units, namely cells, which are composed of a three-phase diode-based front-end rectifier, a dc link electrolytic capacitor, and a single-phase full-wave voltage-source inverter. The main advantage is the improved power quality at both ac system and motor sides. However, two drawbacks are present in these configurations. These are: (a) the single-phase operation of the inverter in each cell generates a large second current harmonic that is injected back into the dc link capacitor, thus, a large electrolytic capacitor has to be used in order to guarantee a reduced voltage ripple across it; (b) the three-phase diode-based front-end rectifier does not provide the regenerative operating mode as required, for instance, by down-hill belt conveyors in minery applications, where this operating mode is the normal one. This paper proposes to replace the diode-based front-end rectifier by an active front-end rectifier and a novel control strategy in order to overcome the aforementioned drawbacks. In fact, the active front-end rectifier allows the topology to regenerate and the control strategy removes the large second current harmonic from the dc link capacitor, thus reducing its size. Both features are achieved without any penalties in the quality of the waveforms. Simulated results confirm the theoretical considerations.
AB - Multi-cell power circuit topologies have probed to be an effective alternative to medium-voltage ac drives. Commercial units are built up based on modular units, namely cells, which are composed of a three-phase diode-based front-end rectifier, a dc link electrolytic capacitor, and a single-phase full-wave voltage-source inverter. The main advantage is the improved power quality at both ac system and motor sides. However, two drawbacks are present in these configurations. These are: (a) the single-phase operation of the inverter in each cell generates a large second current harmonic that is injected back into the dc link capacitor, thus, a large electrolytic capacitor has to be used in order to guarantee a reduced voltage ripple across it; (b) the three-phase diode-based front-end rectifier does not provide the regenerative operating mode as required, for instance, by down-hill belt conveyors in minery applications, where this operating mode is the normal one. This paper proposes to replace the diode-based front-end rectifier by an active front-end rectifier and a novel control strategy in order to overcome the aforementioned drawbacks. In fact, the active front-end rectifier allows the topology to regenerate and the control strategy removes the large second current harmonic from the dc link capacitor, thus reducing its size. Both features are achieved without any penalties in the quality of the waveforms. Simulated results confirm the theoretical considerations.
UR - http://www.scopus.com/inward/record.url?scp=84902347002&partnerID=8YFLogxK
U2 - 10.1109/isie.2002.1025845
DO - 10.1109/isie.2002.1025845
M3 - Conference contribution
AN - SCOPUS:84902347002
SN - 0780373693
SN - 9780780373693
T3 - IEEE International Symposium on Industrial Electronics
SP - 857
EP - 862
BT - ISIE 2002 - Proceedings of the 2002 IEEE International Symposium on Industrial Electronics
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2002 IEEE International Symposium on Industrial Electronics, ISIE 2002
Y2 - 8 July 2002 through 11 July 2002
ER -