Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/152422
Title: A control strategy for dual-input neutral-point-clamped inverter-based grid-connected photovoltaic system
Authors: Beniwal, Neha
Dehghani Tafti, Hossein
Farivar, Glen Ghias
Ceballos, Salvador
Pou, Josep
Blaabjerg, Frede
Keywords: Engineering::Electrical and electronic engineering::Power electronics
Issue Date: 2021
Source: Beniwal, N., Dehghani Tafti, H., Farivar, G. G., Ceballos, S., Pou, J. & Blaabjerg, F. (2021). A control strategy for dual-input neutral-point-clamped inverter-based grid-connected photovoltaic system. IEEE Transactions On Power Electronics, 36(9), 9743-9757. https://dx.doi.org/10.1109/TPEL.2021.3063745
Project: 2019-T1-001-168 (RG 80/19) 
Journal: IEEE Transactions on Power Electronics 
Abstract: This article presents a control strategy for a dual-input neutral-point-clamped (NPC) inverter-based grid-connected photovoltaic (PV) system to asymmetrically control the PV arrays without incorporating any additional external circuit. This is achieved by employing an analytically developed linearization block, which helps in generating the required neutral point (NP) current to counter for the difference in the PV currents. The analysis also provides the maximum NP current compensation limits of the NPC inverter. If the required NP current reference is less than the maximum limit, both PV arrays operate at their maximum power points. However, if the required current exceeds the limit, one of the PV arrays operates at its maximum power point, while the output power of the other PV array is reduced to satisfy the NP current limit. Experimental tests are conducted on a laboratory prototype to validate the performance of the proposed control strategy. currents. The analysis also provides the maximum NP current compensation limits of the NPC inverter. If the required NP current reference is less than the maximum limit, both PV arrays operate at their maximum power points. However, if the required current exceeds the limit, one of the PV arrays operates at its maximum power point (MPP) while the output power of the other PV array is reduced to satisfy the NP current limit. Experimental tests are conducted on a laboratory prototype to validate the performance of the proposed control strategy.
URI: https://hdl.handle.net/10356/152422
ISSN: 0885-8993
DOI: 10.1109/TPEL.2021.3063745
Rights: © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: https://doi.org/10.1109/TPEL.2021.3063745.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
ERI@N Journal Articles
IGS Journal Articles

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