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New Method for Balancing Capacitors Voltages in NPC Inverter without DC-link Voltages Sensors
| International Journal of Computer Applications |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 65 - Number 22 |
| Year of Publication: 2013 |
| Authors: Bessem Omri, Kaicar Ammous, Anis Ammous |
10.5120/11216-6370
|
Bessem Omri, Kaicar Ammous, Anis Ammous . New Method for Balancing Capacitors Voltages in NPC Inverter without DC-link Voltages Sensors. International Journal of Computer Applications. 65, 22 ( March 2013), 17-24. DOI=10.5120/11216-6370
Abstract
This paper presents a simple SVM technique of capacitors voltages balance for three-level NPC inverters. In the proposed SVM algorithm the voltages sensors are not required. An adaptative observer to estimate capacitors voltages was used. The presented SVM technique slightly modifies space vector modulation technique by adding a control parameter which is used to adjust the distribution of vector times of middle voltage vector according to the capacitors voltages. Simulation results are given to show the validity of the proposed balance algorithm.
References
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