RT Journal Article
T1 A Dual-Mode Modulation Technique for Controlling the Average Neutral Point Current in Neutral-Point-Clamped Converters
A1 Beniwal, Neha
A1 Farivar, Glen Ghias
A1 Tafti, Hossein Dehghani
A1 Pou, Josep
A1 Ceballos, Salvador
A1 Konstantinou, Georgios
A1 Townsend, Christopher D.
AB This article presents a dual-mode modulation technique that aims to control the average current flow into the neutral point (NP) of the NP-clamped (NPC) converter without the need for any additional hardware. The two modes of operation are normal mode and compensating mode. In the normal operation mode, all the three phases switch between two consecutive voltage levels (between the positive or negative dc-rail and the NP) in a switching period. In the COM, at least one of the phases switches between the positive and negative dc-rails in a switching period. An analytical solution is developed to determine the duration of these two operation modes within each fundamental cycle based on the converter's operating condition. An advantage of this solution is that it can be generalized for balancing the capacitor voltages in all applications employing NPC converters. The proposed solution also determines the maximum average NP current injection capacity of the NPC converter under dual-mode modulation technique, which indicates the stable operating range of the converter. The performance of the proposed modulation technique is validated experimentally for various loading conditions.
SN 0885-8993
YR 2021
FD 2021-05
LA eng
NO Beniwal , N , Farivar , G G , Tafti , H D , Pou , J , Ceballos , S , Konstantinou , G & Townsend , C D 2021 , ' A Dual-Mode Modulation Technique for Controlling the Average Neutral Point Current in Neutral-Point-Clamped Converters ' , IEEE Transactions on Power Electronics , vol. 36 , no. 5 , 9222045 , pp. 6079-6091 . https://doi.org/10.1109/TPEL.2020.3030678
NO Publisher Copyright: © 1986-2012 IEEE.
NO Manuscript received March 25, 2020; revised July 27, 2020; accepted September 26, 2020. Date of publication October 13, 2020; date of current version January 22, 2021. This work was supported in part by the Singapore Ministry of Education Academic Research Fund Tier 1 under Grant 2019-T1-001-168 (RG 80/19) and in part by the Basque Country Government under Project ENSOL2 (Development of Advanced PV Technologies) under Grant KK-2020/00077. Recommended for publication by Associate Editor F. Wang. (Corresponding author: Neha Beniwal.) Neha Beniwal is with the Energy Research Institute @ NTU, Interdisciplinary Graduate School, Nanyang Technological University, Singapore 639798, Singapore (e-mail: nsingh341@gmail.com).
DS TECNALIA Publications
RD 28 jul 2024