Abstract
This paper proposes a new modulation strategy that balances the neutral-point voltage for three-level neutral-clamped inverter systems. The proposed modulation replaces the P-type or N-type small switching states with other switching states that do not affect the neutral-point voltage. The zero and medium switching states are employed to help the neutral-point voltage balancing. This method little bit increases the switching events and output total harmonic distortion. However, this method has a strong balancing ability at all regions. Further, it is very simple to implement in both space vector modulation and carrier-based PWM methods. Simulation and experimental results verify the validity and feasibility of the proposed new modulation strategy
| Original language | English |
|---|---|
| Article number | 6693688 |
| Pages (from-to) | 91-100 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Energy Conversion |
| Volume | 29 |
| Issue number | 1 |
| DOIs | |
| State | Published - Mar 2014 |
Keywords
- Carrier-based PWM (CB-PWM)
- Multilevel
- neutral-point clamped (NPC) inverter
- neutral-point voltage balancing
- space vector modulation
- T-type inverter