Abstrakt
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.
| Originalsprog | Engelsk |
|---|---|
| Titel | IEEE Energy Conversion Congress and Exposition : Energy Conversion Innovation for a Clean Energy Future, ECCE 2011, Proceedings |
| Antal sider | 8 |
| Publikationsdato | 28. nov. 2011 |
| Sider | 2087-2094 |
| Artikelnummer | 6064044 |
| ISBN (Trykt) | 9781457705427 |
| DOI | |
| Status | Udgivet - 28. nov. 2011 |
| Begivenhed | 3rd Annual IEEE Energy Conversion Congress and Exposition, ECCE 2011 - Phoenix, AZ, USA Varighed: 17. sep. 2011 → 22. sep. 2011 |
Konference
| Konference | 3rd Annual IEEE Energy Conversion Congress and Exposition, ECCE 2011 |
|---|---|
| Land/Område | USA |
| By | Phoenix, AZ |
| Periode | 17/09/2011 → 22/09/2011 |
| Sponsor | IEEE Power Electronics Society: Powering a, Sustainable Future (PELS), IEEE Industry Applications Society (IAS) |