Title :
On the Efficiency of Voltage Source and Current Source Inverters for High-Power Drives
Author :
Wiechmann, Eduardo P. ; Aqueveque, Pablo ; Burgos, Rolando ; Rodríguez, José
Author_Institution :
Concepcion Univ., Concepcion
fDate :
4/1/2008 12:00:00 AM
Abstract :
The energy performance of various types of voltage-source and current-source converters is examined. For fairness and completeness, efficiency is calculated for three major battleground scenarios. The first is a low dynamic nonregenerative group of applications such as pumps, fans, and compressors. This group represents 85% of high power (2 MW) industrial applications where energy savings are usually a primary consideration justifying investment. The second scenario considers applications requiring good dynamic response and regenerative braking. Finally, the third group considers very high power applications (over 20 MW). The evaluation presented takes into account semiconductor switching and conduction losses, losses in the medium voltage feeding transformer (determined per IEEE Standard C57.18.10-1998), and the losses in ac and dc filters. For purposes of analysis, computer simulations validated against measurements taken on a 1-MW voltage source inverter (VSI) and a 1.4-MW current source inverter (CSI) were used. The results of the first scenario show competitive efficiencies for VSI and CSI drives, whereas voltage source-based solutions are more energy efficient in the second scenario considered. For the last group, the current source load-commutated inverter exhibits the best performance.
Keywords :
AC motor drives; PWM invertors; dynamic response; electric machines; power electronics; regenerative braking; AC motor drives; current source inverters; dynamic response; electric machines; high-power drives; power electronics; pulsewidth modulation; regenerative braking; voltage source inverters; AC motor drives; efficiency; electric machines; motor drives; multilevel systems; power electronics; pulsewidth modulation (PWM);
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2008.918625