Voltage impact analyses of solar photovoltaics on distribution load tap changer operations

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17 Scopus citations

Abstract

Recently, the penetration of solar photovoltaic (PV) systems in Low Voltage (LV) distribution feeders has significantly increased and is expected to increase further in the coming years. Variability in solar PV output and high R/X ratio of LV distribution feeder results in voltage fluctuations. Local distribution companies (LDCs) rely on load tap changing transformers or feeder voltage regulators to mitigate voltage fluctuations. The objective of this paper is to examine the operational impact of increase in solar PV penetration on LV distribution networks through quasi-static time series analysis. IEEE 13-node test feeder is used in this paper as a test system. Simulations are carried out for a one-year period with 1-minute time step using OpenDSS. Results show significant increase in the total number of tap operations as solar PV penetration increases. Impact on nodal voltages and feeder net power is also discussed in detail. Finally, this paper suggests various mitigation strategies that can be used by LDCs to overcome this issue.

Original languageEnglish
Title of host publication2017 North American Power Symposium, NAPS 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538626993
DOIs
StatePublished - Nov 13 2017
Event2017 North American Power Symposium, NAPS 2017 - Morgantown, United States
Duration: Sep 17 2017Sep 19 2017

Publication series

Name2017 North American Power Symposium, NAPS 2017

Conference

Conference2017 North American Power Symposium, NAPS 2017
Country/TerritoryUnited States
CityMorgantown
Period09/17/1709/19/17

Funding

This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy.

FundersFunder number
SunShot National Laboratory
U.S. Department of Energy
Office of Science
Office of Energy Efficiency and Renewable Energy

    Keywords

    • Solar variability
    • load tap change
    • penetration level
    • voltage impact

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