Impacts of Photovoltaics in Low-Voltage Distribution Networks: A Case Study in Malta

Yesbol Gabdullin and Brian Azzopardi ()
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Yesbol Gabdullin: MCAST Energy Research Group, Institute for Engineering and Transport, Malta College of Arts, Science and Technology (MCAST), PLA 9032 Paola, Malta
Brian Azzopardi: MCAST Energy Research Group, Institute for Engineering and Transport, Malta College of Arts, Science and Technology (MCAST), PLA 9032 Paola, Malta

Energies, 2022, vol. 15, issue 18, 1-14

Abstract: Photovoltaic systems (PVs) are promising low-carbon technologies playing a major role in the electricity business. In terms of voltage variation and feeder usage capacity, high PV penetration levels have significant technical implications for grid stability, particularly in Low Voltage (LV) networks. This paper presents a comprehensive PV integration analysis on real-life residential LV networks in Malta using recorded smart metering data. The methodology framework and tools developed are highlighted through step-by-step results on their usefulness. First, at the substation level, an LV network with seven LV feeders is analyzed using Monte Carlo simulations and OpenDSS. Then, Cumulative Distribution Functions (CDFs) are extracted to establish the likelihood of LV network challenges. Afterwards, 95 multi-feeder analyses assess the impact assessment on the first occurrence of LV network challenges and predominant issues. Finally, a Regression Analysis Tool, considering the regression’s standard error, is built for seven feeder characteristics to predict the impacts. The stochastic processes reveal strong relationships with feeder characteristics that are helpful for network planning and operations. However, the Maltese grid currently has less than 20% PV penetration at any LV feeder. Hence, significant technological hurdles are absent.

Keywords: photovoltaic systems (PVs); Low Voltage (LV) networks; stochastic processes; Monte Carlo methods; optimal power flow (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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