Izdelava ekvivalentnega impedančnega modela elektroenergetskega sistema Slovenije za analize harmonskega popačenja

Babnik, Rok (author), Blažič, Boštjan (mentor)

V diplomski nalogi je predstavljen elektroenergetski sistem Slovenije, teoretične osnove harmonskega popačenja in posodobitve impedančnega modela elektroenergetskega sistema Slovenije, ki omogoča analizo harmonskega popačenja z upoštevanjem realnih podatkov o elektrarnah, vodih, transformatorjih in kompenzacijskih napravah. Model temelji na uporabi porazdeljenega pi-modela za visokonapetostne vode ter vključuje nadgradnjo sistema na 110 kV nivoju z dodatnimi kompenzacijami. Za prikaz vpliva priključitve novih naprav v EES Slovenije na harmonsko popačenje so bile v programskem okolju PowerFactory izvedene simulacije z dvema različnima hranilnikoma električne energije. Simulacija je potekala na osnovi tokovnih injekcij posameznih harmonskih komponent (od 50 Hz do 2000 Hz). Rezultati simulacij so prikazani v obliki tabel in grafov ter omogočajo primerjavo vpliva hranilnikov na kakovost električne energije. Analiza je pokazala, da hranilnik z večjimi tokovnimi injekcijami povzroča višje harmonsko popačenje v sistemu, kar pomeni večje tveganje za obratovanje omrežja. Boljši hranilnik, ki generira manjše harmonske komponente, je zato za elektroenergetski sistem bistveno primernejši.

• Language: Slovenian
• Keywords: elektroenergetski sistem, harmonsko popačenje, impedančni model, tokovne injekcije, hranilnik električne energije, PowerFactory
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FE - Faculty of Electrical Engineering
• Year: 2025
• PID: 20.500.12556/RUL-172660
• COBISS.SI-ID: 262142211
• Publication date in RUL: 10.09.2025

Secondary language

• Language: English
• Title: Development of an equivalent impedance model of the Slovenian power system for harmonic distortion analysis

Abstract

The thesis presents the Electric Power System of Slovenia, the theoretical foundations of harmonic distortion, and the updates to the impedance model of Slovenia’s power system, which enable harmonic distortion analysis based on real data from power plants, transmission lines, transformers, and compensation devices. The model is based on the use of a distributed pi-model for high-voltage lines and includes an upgrade of the system at the 110 kV level with additional compensation. To display the impact of connecting new devices to the Slovenian power grid on harmonic distortion, simulations with two different energy storage systems were conducted in the PowerFactory software environment. The simulation was based on current injections of individual harmonic components (from 50 Hz to 2000 Hz). The results of the simulations are presented in tables and graphs, allowing for a comparison of the impact of the storage systems on power quality. The analysis showed that a storage unit with higher current injections causes greater harmonic distortion in the system, which implies a higher risk for network operation. A better-quality storage unit that generates lower harmonic components is therefore significantly more suitable for the electric power system.

• Keywords: electric power system, harmonic distortion, impedance model, current injections, energy storage system, PowerFactory