Frekventno ovisni 3D model jednostavne konfiguracije uzemljivača

master's thesis

• Title (english): Frequency dependent 3D model of simple grounding configuration
• Author: Sven Jurak
• Mentor: Davor Grgić (mentor)
• Committee member: Davor Grgić (predsjednik povjerenstva)
• Committee member: Siniša Šadek (član povjerenstva)
• Committee member: Paulina Družijanić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2024-09-13, Croatia

Abstract

Pojava atmosferskog pražnjenja u sustav unosi visoke frekvencije na kojima DC model uzemljenja više nije točan. Osim pojave impedancije u sustavu, odziv na frekvenciju popraćen je i promjenama u ponašanju uzemljivačkog vodiča te ponašanju tla. Kod tla to su promjena parametara tla s frekvencijom i ionizacija tla, a kod vodiča skin efekt, propagacijski efekti i struja pomaka. Napravljen je model u ANSYS HFSS programu na temelju članka čiji su rezultati poslužili za validaciju te je proučen utjecaj frekvencije na ponašanje jednostavne uzemljivačke šipke. Također izvršene su simulacije o utjecaju različitih parametara tla i dimenzija šipke na ponašanje impedancije sustava.

Abstract (english)

The appearance of atmospheric discharge brings high frequencies into the system where the DC grounding model is no longer accurate. In addition to the appearance of impedance in the system, the frequency response is also connected with changes in the behaviour of the grounding conductor and the behaviour of the soil. In the case of soil, these are the change of soil parameters with frequency and soil ionization, and in the case of conductors there are skin effect, propagation effects and displacement current. A model was created in the ANSYS HFSS program based on an article whose results were used for validation. The influence of frequency on the behaviour of a simple grounding rod was studied. Simulations were also performed on the influence of different soil parameters and rod dimensions on the behaviour of the system impedance.

• Keywords: uzemljenje; HFSS; atmosfersko pražnjenje; impedancija; karakteristična frekvencija; permitivnost; električna vodljivost
• Keywords (english): grounding; HFSS; atmospheric discharge; impedance; characteristic frequency; permittivity; electrical conductivity
• Language: croatian
• URN:NBN: urn:nbn:hr:168:634160
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2024-10-12 20:58:25