Impact on Voltage Regulation in Medium Voltage Distribution Networks Due to the Insertion of Photovoltaic Generators

Gustavo Fernandes de Negreiros, Fábio Xavier Lobo, Igor Cavalcante Torres and Chigueru Tiba ()
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Gustavo Fernandes de Negreiros: Department of Nuclear Energy, Federal University of Pernambuco (UFPE), Recife 50740-545, Brazil
Fábio Xavier Lobo: Federal Institute of Pernambuco (IFPE), Pesqueira 55200-000, Brazil
Igor Cavalcante Torres: Campus of Engineering and Agricultural Sciences (CECA), Federal University of Alagoas (UFAL), Rio Largo 57100-000, Brazil
Chigueru Tiba: Department of Nuclear Energy, Federal University of Pernambuco (UFPE), Recife 50740-545, Brazil

Energies, 2023, vol. 16, issue 3, 1-18

Abstract: The objective of this paper was to analyze the impacts caused by the operation of voltage regulators in electrical distribution networks and to evidence the number of operations in the face of short-duration voltage variation caused by the high intermittency of the connected PV generators. A real LV and MV feeder was used, modeled in OpenDSS software, based on normative standards, adjustments, and technical maneuvers strategically used by the local utility. The analyses considered the temporal variations for the photovoltaic generators and different load demand profiles connected to the feeder. The feeder was submitted to the demand curves varying the load percentage, framing it in high and conventional (nominal) load according to the profiles of consumers and prosumers connected. The simulations made it possible to observe the exacerbated elevation in the number of maneuvers performed by the voltage regulators of the network. The single-phase voltage regulators stood out by the elevation of control operations, causing premature wear of the PV generation equipment connected to the most loaded phase. It was observed that discrepancies in the power flow in the lines and the voltage levels at the busbars. The creation of strategies and decisions to correct these impacts caused to transformers and regulators is possible.

Keywords: LV and MV distribution network; high penetration of PV systems; impact on voltage regulation; distribution transformers (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: 2023
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