Power Quality Issues Concerning Photovoltaic Generation in Distribution Grids

Jaan Niitsoo; Marek Jarkovoi; Paul Taklaja; Joni Klüss; Ivo Palu

doi:10.4236/sgre.2015.66014

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SGRE> Vol.6 No.6, June 2015

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Power Quality Issues Concerning Photovoltaic Generation in Distribution Grids

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DOI: 10.4236/sgre.2015.66014 4,263 Downloads 5,151 Views Citations

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Jaan Niitsoo¹, Marek Jarkovoi², Paul Taklaja¹, Joni Klüss³, Ivo Palu¹

Affiliation(s)

¹Department of Electrical Power Engineering, Tallinn University of Technology, Tallinn, Estonia.
²Department of Electrical Engineering, Tallinn University of Technology, Tallinn, Estonia.
³Department of Electrical Engineering and Automation, Aalto University, Helsinki, Finland.

ABSTRACT

Unregulated utilization of renewable generation including residential photovoltaic (PV) systems can have a significant impact on load characteristics in distribution networks. For improving PV generation capabilities, power quality aspects have to be coordinated with present load characteristics. This paper discusses the harmonic content of PV generation and the influence to power quality indicators in residential distribution networks. PV generation measurement results including current harmonic amplitude and phase angle values are presented. Results of different modelling scenarios are analysed and a simplified model of harmonics in PVs is offered. The results of the study showed a moderate additional harmonic distortion in residential load current and voltage distortion at the substation’s busbar when PVs were added. Novelty of the paper is that harmonic current values at higher orders are presented and analysed. The results pointed out in this paper could be further used for modelling the actual harmonic loads of the PVs in distribution networks.

KEYWORDS

Current Measurement, Load Modelling, Photo Voltaic, Power Quality, Power System Harmonics

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Niitsoo, J. , Jarkovoi, M. , Taklaja, P. , Klüss, J. and Palu, I. (2015) Power Quality Issues Concerning Photovoltaic Generation in Distribution Grids. Smart Grid and Renewable Energy, 6, 148-163. doi: 10.4236/sgre.2015.66014.

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