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Title: Study on the Low-Voltage Ride-Thorough Capability of Photovoltaic Grid-Connected Neutral-Point-Clamped Inverters with Active/Reactive Power Injection
Authors: Konstantinou, Georgios
Dehghani Tafti, Hossein
Iftekhar Maswood, Ali
Pou, Josep
Kandasamy, Karthik
Lim, Ziyou
Ooi, Gabriel Heo Peng
Keywords: Low-voltage ride-thorough
Photovoltaic power plants
Issue Date: 2016
Source: Dehghani Tafti, H., Iftekhar Maswood, A., Konstantinou, G., Pou, J., Kandasamy, K., Lim, Z., et al. (2016). Study on the Low-Voltage Ride-Thorough Capability of Photovoltaic Grid-Connected Neutral-Point-Clamped Inverters with Active/Reactive Power Injection. IET Renewable Power Generation, in press.
Series/Report no.: IET Renewable Power Generation
Abstract: Low-voltage ride-thorough capability is among the challenges in the operation of mediumand large-scale grid-connected photovoltaic power plants (PVPPs). Additionally, reactive power injection during voltage sags is required by power system operators in order to enhance the voltage of the point of common coupling (PCC). This paper studies the performance of medium- and large-scale grid-connected PVPPs during these events. An algorithm for the calculation of current references, in the dq-frame, during voltage sags is introduced, which considers the inverter current limitation, grid code requirements and the amount of extracted power from photovoltaic strings. The proposed algorithm uses the full current capacity of the inverter in injecting active or reactive powers to the grid during voltage sags, which leads in a better grid voltage enhancement. The performance of proposed control strategies is investigated on a 150-kVA PVPP connected to the 12.47-kV medium-voltage test-case system simulation model during different fault conditions. An experimental setup of the 3.3-kVA grid-connected three-level neutral-point-clamped inverter with a dc/dc converter illustrates and validates the performance of the controller in injecting required active/reactive power and supporting the network voltage.
Rights: © 2016 Institution of Engineering and Technology (IET). This is the author created version of a work that has been peer reviewed and accepted for publication by IET Renewable Power Generation, Institution of Engineering and Technology (IET). It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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