Voltage balancing of a five-level flying capacitor converter using optimum switching transitions
| Autor: | Mihai Ciobotaru, Amer M. Y. M. Ghias, Vassilios G. Agelidis, Josep Pou |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. TIEG - Terrassa Industrial Electronics Group, Universitat Politècnica de Catalunya. (TIEG) - Terrassa Industrial Electronics Group |
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Capacitat elèctrica
Engineering Electricitat--Dispositius de distribució business.industry Flying capacitor Switching frequency Cronometria Electric switchgear Dynamic load testing Phase disposition Capacitor voltage Control theory Redundancy (engineering) Enginyeria electrònica::Electrònica de potència [Àrees temàtiques de la UPC] Time measurements Voltage regulation business Electric capacity Voltage |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname IECON UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| Popis: | The flying capacitor (FC) multilevel converter requires a capacitor voltage balancing mechanism for proper operation. This paper proposes a voltage balancing scheme for a five-level FC converter based on phase disposition pulse-width modulation (PD-PWM) using transitions that produce the minimum number of switching events. This strategy will be called optimal-transition voltage balancing (OTVB) scheme. Since multiple optimum switching transitions between two consecutive voltage levels may be available, such a redundancy is used to regulate the FC voltages at their desired levels. Those transitions that produce more switching events are avoided. The rest of transitions are evaluated by means of a cost function and the one that produces the minimum value is selected. Simulation results show a significant reduction of the average switching frequency as compared to the use of the optimal-state voltage balancing (OSVB) scheme, while maintaining the balance of the FC voltages. Moreover, the proposed PD-PWM voltage balancing strategy is robust to static and dynamic load conditions. |
| Databáze: | OpenAIRE |
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