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Title: Study on the unbalanced current injection capability of grid-connected photovoltaic neutral-point-clamped inverter
Authors: Dehghani Tafti, Hossein
Maswood, Ali Iftekhar
Kandasamy, Karthik
Lim, Ziyou
Ooi, Gabriel H. P.
Konstantinou, Georgios
Pou, Josep
Keywords: Fault-ride-through capability
Photovoltaic power plant
Issue Date: 2016
Source: Dehghani Tafti, H., Maswood, A. I., Kandasamy, K., Lim, Z., Ooi, G. H. P., Konstantinou, G., & Pou, J. (2016). Study on the unbalanced current injection capability of grid-connected photovoltaic neutral-point-clamped inverter. 2016 IEEE Energy Conversion Congress and Exposition (ECCE).
Conference: 2016 IEEE Energy Conversion Congress and Exposition (ECCE)
Abstract: Due to high penetration of distributed generation units in power system, fault ride through (FRT) capability is one of the new requirements of the medium-scale grid-tied photovoltaic power plants (PVPPs). This paper proposes and investigates a control strategy for the neutral-point-clamped (NPC) inverter in order to inject proper unbalanced reactive currents to the grid during unbalanced grid faults. The proper unbalanced current injection reduces negative sequence of grid voltages and currents. The current references are scaled up/down individually, based on the grid phase rms voltages and inverter nominal current. The performance of the implemented control algorithm is investigated on a 150-kVA PVPP connected to 12.47-kV medium-voltage grid simulation model under various voltage sag conditions. Results from an experimental setup of grid-tied NPC inverter are presented in order to demonstrate the effectiveness of the proposed unbalanced current injection algorithm.
Other Identifiers: 6 p.
DOI: 10.1109/ECCE.2016.7855475
Schools: School of Electrical and Electronic Engineering 
Rights: © 2016 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: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Conference Papers

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