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Energies
Volume 13
Issue 7
10.3390/en13071668
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Article

Impact Evaluation of Grid-Connected PV Systems on PQ Parameters by Comparative Analysis based on Inferential Statistics

by
German Osma-Pinto
*,
María García-Rodríguez
,
Jeisson Moreno-Vargas
and
Cesar Duarte-Gualdrón
School of Electrical, Electronics, and Telecommunications Engineering, Universidad Industrial de Santander, Bucaramanga 680002, Colombia
*
Author to whom correspondence should be addressed.
Energies 2020, 13(7), 1668; https://doi.org/10.3390/en13071668
Submission received: 15 January 2020 / Revised: 14 February 2020 / Accepted: 19 February 2020 / Published: 3 April 2020
(This article belongs to the Special Issue Power Quality of Renewable Energy Source Systems)
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Abstract

The intermittent injection of power and the nature of power electronic devices used for photovoltaic (PV) systems can affect the power quality (PQ) of the grid to which they are connected. This study proposes to quantify and evaluate the impact of PV injection on the PQ of a low-voltage (LV) network by applying a statistical analysis through hypothesis testing for the mean comparison of populations of parameters with and without a PV system. The effects of PV power injection and load demand at the point of common coupling on PQ are monitored. The methodology includes the selection and monitoring of PQ, the use of a matrix for classification of data with similar load and PV power injection conditions, and the application of the Wilcoxon rank sum test. This methodology was applied to evaluate the impact of a 9.8 kWp PV system on the PQ of an LV network.
Keywords: power quality; photovoltaic; statistical assessment; low-voltage network power quality; photovoltaic; statistical assessment; low-voltage network
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MDPI and ACS Style

Osma-Pinto, G.; García-Rodríguez, M.; Moreno-Vargas, J.; Duarte-Gualdrón, C. Impact Evaluation of Grid-Connected PV Systems on PQ Parameters by Comparative Analysis based on Inferential Statistics. Energies 2020, 13, 1668. https://doi.org/10.3390/en13071668

AMA Style

Osma-Pinto G, García-Rodríguez M, Moreno-Vargas J, Duarte-Gualdrón C. Impact Evaluation of Grid-Connected PV Systems on PQ Parameters by Comparative Analysis based on Inferential Statistics. Energies. 2020; 13(7):1668. https://doi.org/10.3390/en13071668

Chicago/Turabian Style

Osma-Pinto, German, María García-Rodríguez, Jeisson Moreno-Vargas, and Cesar Duarte-Gualdrón. 2020. "Impact Evaluation of Grid-Connected PV Systems on PQ Parameters by Comparative Analysis based on Inferential Statistics" Energies 13, no. 7: 1668. https://doi.org/10.3390/en13071668

APA Style

Osma-Pinto, G., García-Rodríguez, M., Moreno-Vargas, J., & Duarte-Gualdrón, C. (2020). Impact Evaluation of Grid-Connected PV Systems on PQ Parameters by Comparative Analysis based on Inferential Statistics. Energies, 13(7), 1668. https://doi.org/10.3390/en13071668

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