The impact of three-phase connected photovoltaic power plants on voltage profiles due to insulation, external temperature and inverter efficiency

Ostojić, Mario (author), Bosović, Adnan (author), Musić, Mustafa (author)

Nowadays, photovoltaic power plants are widely used because they produce low-cost insulation clean energy at lower costs, thereby contributing to energy independence and reducing CO2 emissions. In this study, the data on network component parameters of a low-voltage feeder operating in Bosnia and Herzegovina is analysed. Also, it includes real-time data of load profiles from a control meter installed in a transformer substation. Timeseries with one-hour readings of three parameters are also used: insulation (i.e. a global horizontal irradiance, external (ambient) temperature and inverter efficiency. The occurrence of the three parameters is analysed on threephase connected photovoltaic power plants. Readings for the irradiance and ambient temperature are obtained from Solcast API Toolkit and those for the inverter efficiency with equation with the effect of the irradiance and ambient temperature simultaneously. The voltage profiles are analysed according to the EN 50160 standard. The network is modelled in the DIgSILENT powerfactory software and its analysis is made using the Quasi-Dynamic Simulation Toolbox. In total, 18 scenarios are made: nine without and nine with Normal operating cell temperature conditions, executed by Balanced Load Flow. Results show how that the three parameters affect the voltage levels of the threephase connected photovoltaic power plants of the power network on a typical summer day with a direct impact on the network power quality.

• Language: English
• Keywords: three-phase photovoltaic power (PV) plant, low-voltage (LV) network, power quality, Balanced Load Flow (BLF)
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FE - Faculty of Electrical Engineering
• Year: 2025
• Number of pages: Str. 143-150
• Numbering: Letn. 92, št. 3
• PID: 20.500.12556/RUL-183354
• UDC: 621.311.243:621.316.1
• ISSN on article: 0013-5852
• COBISS.SI-ID: 280447747
• Publication date in RUL: 11.06.2026

Record is a part of a journal

• Title: Elektrotehniški vestnik
• Publisher: Strokovna zadruga koncesijoniranih elektrotehnikov, Elektrotehniška zveza Slovenije
• ISSN: 0013-5852
• COBISS.SI-ID: 742916

Secondary language

• Language: Slovenian
• Title: Vpliv trifazno priključenih fotonapetostnih elektrarn na napetostne profile zaradi izolacije, zunanje temperature in učinkovitosti pretvornika

Abstract

V sodobnem času so fotonapetostne elektrarne razširjene zaradi proizvodnje čiste energije z nizkimi stroški, kar prispeva k zmanjšanju emisij CO₂ in energetski neodvisnosti. Študija analizira parametre nizkonapetostnega omrežja v Bosni in Hercegovini ter podatke o dejanski obremenitvi iz kontrolnega števca v transformatorski postaji. Uporabljeni so enourni odčitki treh parametrov: globalna obsevanost, zunanja temperatura in učinkovitost pretvornika. Podatki za obsevanost in temperaturo okolice so pridobljeni prek Solcast API, učinkovitost pretvornika pa je izračunana glede na oba ta dva vpliva. Analiziran je tudi njihov vpliv na trifazno priključene fotonapetostne elektrarne. Napetostni profili so ocenjeni po standardu EN 50160 v okolju DIgSILENT PowerFactory z uporabo orodja QuasiDynamic Simulation Toolbox. V 18 scenarijih so prikazani vplivi parametrov na napetostne nivoje in kakovost električne energije v omrežju.

• Keywords: fotonapetostne elektrarne, energetska neodvisnost, nizkonapetostno omrežje, transformatosrska postaja