TY - JOUR
T1 - New Modulation Strategy to Balance the Neutral-Point Voltage for Three-Level Neutral-Clamped Inverter Systems
AU - Choi, Uimin
AU - Lee, June-Seok
AU - Lee, Kyo-Beum
PY - 2014/3
Y1 - 2014/3
N2 - 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.
AB - 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.
KW - Carrier-based PWM (CB-PWM)
KW - Multilevel
KW - Neutral-point clamped (NPC) inverter
KW - Neutral-point voltage balancing
KW - Space vector modulation
KW - T-type inverter
U2 - 10.1109/TEC.2013.2293502
DO - 10.1109/TEC.2013.2293502
M3 - Journal article
SN - 0885-8969
VL - 29
SP - 91
EP - 100
JO - I E E E Transactions on Energy Conversion
JF - I E E E Transactions on Energy Conversion
IS - 1
ER -