TY - GEN
T1 - Average Neutral Point Current Control Strategy in Neutral-Point-Clamped Converters
AU - Beniwal, Neha
AU - Farivar, Glen G.
AU - Dehghani Tafti, Hossein
AU - Pou, Josep
AU - Ceballos, Salvador
AU - Konstantinou, Georgios
AU - Townsend, Christopher D.
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021/5/24
Y1 - 2021/5/24
N2 - A control strategy for regulating the average neutral point (NP) current in neutral-point-clamped (NPC) converters is proposed in this paper. Previously presented strategies in the literature control the instantaneous NP current. However, the instantaneous maximum NP current profile is time-varying, which results in difficulties to regulate the average NP current linearly. The proposed strategy in this paper overcomes this drawback by directly controlling the average NP current. Furthermore, it can compensate nonzero average NP currents produced by unbalanced dc loads connected to the converter. In this strategy, the required nonzero average NP current reference is compensated by switching one or two phases between the negative and positive dc-rails for a calculated time interval. The proposed strategy also provides the range for stable operation of the NPC converter by formulating the maximum average current which can be injected into the NP. The effectiveness of the proposed control strategy is validated by performing simulation tests in MATLAB/Simulink environment under variable dc-loading conditions.
AB - A control strategy for regulating the average neutral point (NP) current in neutral-point-clamped (NPC) converters is proposed in this paper. Previously presented strategies in the literature control the instantaneous NP current. However, the instantaneous maximum NP current profile is time-varying, which results in difficulties to regulate the average NP current linearly. The proposed strategy in this paper overcomes this drawback by directly controlling the average NP current. Furthermore, it can compensate nonzero average NP currents produced by unbalanced dc loads connected to the converter. In this strategy, the required nonzero average NP current reference is compensated by switching one or two phases between the negative and positive dc-rails for a calculated time interval. The proposed strategy also provides the range for stable operation of the NPC converter by formulating the maximum average current which can be injected into the NP. The effectiveness of the proposed control strategy is validated by performing simulation tests in MATLAB/Simulink environment under variable dc-loading conditions.
KW - Neutral-point-clamped converter
KW - pulsewidth modulation
KW - three-level modulation
KW - two-level modulation
UR - https://www.scopus.com/pages/publications/85114200213
U2 - 10.1109/ECCE-Asia49820.2021.9479072
DO - 10.1109/ECCE-Asia49820.2021.9479072
M3 - Conference contribution
AN - SCOPUS:85114200213
T3 - Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
SP - 1250
EP - 1255
BT - Proceedings of the Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 12th IEEE Energy Conversion Congress and Exposition - Asia, ECCE Asia 2021
Y2 - 24 May 2021 through 27 May 2021
ER -