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Calculation of the DC-bus Capacitors of the Back-to-Back NPC Converters
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| Author(s) |
Emilio J. Bueno, Santiago Cobreces, Francisco J. Rodriguez, Felipe Espinosa, Marta Alonso, Raul Alcaraz |
| Abstract |
Nowadays the most used multilevel topology for
variable-speed wind turbines (WTs) is the a back-to back
three-level NPC (Neutral Point Clamped) VSCs (voltage
source converter). One of the most critical elements in the
design of this type of converters is the DC-bus capacitors.
The calculus of these depends on the same factors that the
same two-levels topology, and, moreover it is function of a
low frequency ripple due to the current by NP point. In this
work, the value of these capacitors is obtained from the
analytical equations of the DC-bus voltage ripple due to the
iDC (DC-bus current) and the iNP (NP current). These
expressions are verified through simulation and practical
results. |
| Download |
| Filename: | T2-302.pdf |
| Filesize: | 297.8 KB |
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| Type |
Members Only |
| Date |
Last modified 2007-03-08 by System |
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