saujs Sakarya University Journal of Science 2147-835X Sakarya University 10.16984/saufenbilder.808343 Engineering Mühendislik Voltage Stability Analysis of Large Scale PV Plant Reactive Power Control Methods https://orcid.org/0000-0002-0545-2925 Çavdar Bora KARADENİZ TEKNİK ÜNİVERSİTESİ https://orcid.org/0000-0001-6266-2323 Akyazı Ömür KARADENİZ TEKNİK ÜNİVERSİTESİ https://orcid.org/0000-0002-9740-599X Sahın Erdinc Karadeniz Teknik Üniversitesi https://orcid.org/0000-0003-2530-8901 Nuroglu Fatih KARADENİZ TEKNİK ÜNİVERSİTESİ 08 30 2021 25 4 914 925 10 09 2020 06 16 2021 Copyright © 1997, Sakarya University Journal of Science 1997 Sakarya University Journal of Science

The increasing integration of photovoltaic (PV) plants in conventional power systems has led to the need to examine the effects of these plants on the system dynamics. In this study, a well-known IEEE-9 bus power system is modified by integrating PV plant in DigSilent Powerfactory environment. Then, 3 transient cases are tested by using PV plant control units designed by Western Electricity Coordinating Council (WECC). The effect of load and line transient disconnections and 3-phase short circuit fault on modified power system are investigated as case-I, case-II, and case-III, respectively. In all cases, two sub-cases are considered according to the location. As a result, comparison of PV system reactive power control methods (RPCM) is analyzed in terms of voltage stability in these 3 cases.

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