Details
| Original language | English |
|---|---|
| Title of host publication | PESC 07 |
| Subtitle of host publication | IEEE 38th Annual Power Electronics Specialists Conference |
| Pages | 632-638 |
| Number of pages | 7 |
| Publication status | Published - 2007 |
| Event | PESC 07 - IEEE 38th Annual Power Electronics Specialists Conference - Orlando, FL, United States Duration: 17 Jun 2007 → 21 Jun 2007 |
Publication series
| Name | PESC Record - IEEE Annual Power Electronics Specialists Conference |
|---|---|
| ISSN (Print) | 0275-9306 |
Abstract
Multilevel converters have attracted much interest due to increasing applications of medium and high voltage inverters in drives and in FACTs. A large number of topologies and control strategies have been proposed in the literature. Among the topologies, the modular multilevel inverter using several cascaded H-bridges is rather popular, with each H-brldge supplied by an isolated DC voltage source. Most control methods for these inverters are based on the assumption that the DC source voltages all have the same constant value. Some authors have discussed the potential of using unequal DC source voltages, e.g. In a relation of 1:3:9, sacrificing the benefit of having equal ratings for each cell. This paper discusses the potential of cascaded multilevel inverters when their DC source voltages are not exactly equal, but differ from each other in the range of ±20 %. It is shown that this has almost the same benefit in terms of output voltage quality as a relation of 1:3:9, but with similar ratings of each cell. In reality, the instantaneous values of the DC source voltages tend to differ from each other due to operational imbalances. The proposed control strategy is able to take advantage of these nonidealities.
ASJC Scopus subject areas
- Mathematics(all)
- Modelling and Simulation
- Physics and Astronomy(all)
- Condensed Matter Physics
- Energy(all)
- Energy Engineering and Power Technology
- Engineering(all)
- Electrical and Electronic Engineering
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PESC 07 : IEEE 38th Annual Power Electronics Specialists Conference. 2007. p. 632-638 4342061 (PESC Record - IEEE Annual Power Electronics Specialists Conference).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Control strategy for multilevel inverter with non-ideal DC sources
AU - Kuhn, H.
AU - Rüger, N. E.
AU - Mertens, A.
PY - 2007
Y1 - 2007
N2 - Multilevel converters have attracted much interest due to increasing applications of medium and high voltage inverters in drives and in FACTs. A large number of topologies and control strategies have been proposed in the literature. Among the topologies, the modular multilevel inverter using several cascaded H-bridges is rather popular, with each H-brldge supplied by an isolated DC voltage source. Most control methods for these inverters are based on the assumption that the DC source voltages all have the same constant value. Some authors have discussed the potential of using unequal DC source voltages, e.g. In a relation of 1:3:9, sacrificing the benefit of having equal ratings for each cell. This paper discusses the potential of cascaded multilevel inverters when their DC source voltages are not exactly equal, but differ from each other in the range of ±20 %. It is shown that this has almost the same benefit in terms of output voltage quality as a relation of 1:3:9, but with similar ratings of each cell. In reality, the instantaneous values of the DC source voltages tend to differ from each other due to operational imbalances. The proposed control strategy is able to take advantage of these nonidealities.
AB - Multilevel converters have attracted much interest due to increasing applications of medium and high voltage inverters in drives and in FACTs. A large number of topologies and control strategies have been proposed in the literature. Among the topologies, the modular multilevel inverter using several cascaded H-bridges is rather popular, with each H-brldge supplied by an isolated DC voltage source. Most control methods for these inverters are based on the assumption that the DC source voltages all have the same constant value. Some authors have discussed the potential of using unequal DC source voltages, e.g. In a relation of 1:3:9, sacrificing the benefit of having equal ratings for each cell. This paper discusses the potential of cascaded multilevel inverters when their DC source voltages are not exactly equal, but differ from each other in the range of ±20 %. It is shown that this has almost the same benefit in terms of output voltage quality as a relation of 1:3:9, but with similar ratings of each cell. In reality, the instantaneous values of the DC source voltages tend to differ from each other due to operational imbalances. The proposed control strategy is able to take advantage of these nonidealities.
UR - http://www.scopus.com/inward/record.url?scp=48349118879&partnerID=8YFLogxK
U2 - 10.1109/PESC.2007.4342061
DO - 10.1109/PESC.2007.4342061
M3 - Conference contribution
AN - SCOPUS:48349118879
SN - 1424406552
SN - 9781424406555
T3 - PESC Record - IEEE Annual Power Electronics Specialists Conference
SP - 632
EP - 638
BT - PESC 07
T2 - PESC 07 - IEEE 38th Annual Power Electronics Specialists Conference
Y2 - 17 June 2007 through 21 June 2007
ER -