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Title: A General Constant Power Generation Algorithm for Photovoltaic Systems
Authors: Tafti, Hossein Dehghani
Maswood, Ali Iftekhar
Konstantinou, Georgios
Pou, Josep
Blaabjerg, Frede
Keywords: Photovoltaic systems
Single- and two-stage photovoltaic power conversion
Issue Date: 2017
Source: Tafti, H. D., Maswood, A. I., Konstantinou, G., Pou, J., & Blaabjerg, F. (2017). A General Constant Power Generation Algorithm for Photovoltaic Systems. IEEE Transactions on Power Electronics, in press.
Series/Report no.: IEEE Transactions on Power Electronics
Abstract: Photovoltaic power plants (PVPPs) typically operate by tracking the maximum power point in order to maximize conversion efficiency. However, with the continuous increase of installed grid-connected PVPPs, power system operators have been experiencing new challenges, like overloading, overvoltages and operation during grid voltage disturbances. Consequently, constant power generation (CPG) is imposed by grid codes. An algorithm for the calculation of the photovoltaic panel voltage reference, which generates a constant power from the PVPP, is introduced in this paper. The key novelty of the proposed algorithm is its applicability for both single- and two-stage PVPPs and flexibility to move the operation point to the right- or left-side of the maximum power point. Furthermore, the execution frequency of the algorithm and voltage increments between consecutive operating points are modified based on a hysteresis band controller in order to obtain fast dynamic response under transients and low power oscillation during steady-state operation. The performance of the proposed algorithm for both single- and two-stage PVPPs is examined on a 50-kVA simulation setup of these topologies. Moreover, experimental results on a 1-kVA PV system validate the effectiveness of the proposed algorithm under various operating conditions, demonstrating functionalities of the proposed CPG algorithm.
Description: 25 p.
ISSN: 0885-8993
DOI: 10.1109/TPEL.2017.2724544
Rights: © 2017 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 Journal Articles

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