Neutral-point current modeling and control for Neutral-Point Clamped three-level converter drive with small DC-link capacitors
| Autor: | Stig Munk-Nielsen, Sergio Busquets-Monge, Ramkrishan Maheshwari |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. GREP - Grup de Recerca en Electrònica de Potència |
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Engineering
business.industry Circuits de commutació PID controller Pulse techniques (Electronics) Switching circuits Impulsos(Electrònica) Electric current converters law.invention Power (physics) Capacitor Control theory law Voltage controller Modulation Enginyeria electrònica::Electrònica de potència [Àrees temàtiques de la UPC] Inverter Convertidors de corrent elèctric business Voltage |
| Zdroj: | Maheshwari, R K, Munk-Nielsen, S & Busquets-Monge, S 2011, Neutral-point current modeling and control for Neutral-Point Clamped three-level converter drive with small DC-link capacitors . in Proceedings of the 3rd IEEE Energy Conversion Congress and Exposition (ECCE 2011) . IEEE Press, pp. 2087-2094, 3rd IEEE Energy Conversion Congress and Exposition (ECCE 2011), Phoenix, Arizona, United States, 17/09/2011 . https://doi.org/10.1109/ECCE.2011.6064044 Recercat. Dipósit de la Recerca de Catalunya instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| DOI: | 10.1109/ECCE.2011.6064044 |
| Popis: | A Neutral-Point-Clamped (NPC) three-level inverter with small DC-link capacitors is presented in this paper. This inverter requires zero average neutral-point current for stable neutral-point potential. A simple carrier based modulation strategy is proposed for achieving zero average neutral-point current. A new simplified model of the neutral-point voltage dynamics is derived for the proposed modulation strategy. This model shows that the neutral-point current is proportional to the power drawn from the converter and it enables the use of well established classical control theory for neutral-point voltage controller design. A PI controller is used for neutral-point voltage balance. The implementation of the proposed modulation strategy and controller is simple. It does not require any information about the output phase currents. The controller is implemented in a 7.5 kW induction machine based drive with only 14 μF DC-link capacitors. A fast and stable performance of the neutral-point voltage controller is achieved and verified by experiments. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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