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master's thesis
Proračun struja dvostrukog zemljospoja i parcijalnih struja kroz tlo prema HRN EN 60909-3
2022. urn:nbn:hr:179:907275
Rupčić, Iva
University of Split
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture
Department of Power Engineering

Cite this document

Rupčić, I. (2022). Proračun struja dvostrukog zemljospoja i parcijalnih struja kroz tlo prema HRN EN 60909-3 (Master's thesis). Split: University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:179:907275

Rupčić, Iva. "Proračun struja dvostrukog zemljospoja i parcijalnih struja kroz tlo prema HRN EN 60909-3." Master's thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, 2022. https://urn.nsk.hr/urn:nbn:hr:179:907275

Rupčić, Iva. "Proračun struja dvostrukog zemljospoja i parcijalnih struja kroz tlo prema HRN EN 60909-3." Master's thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, 2022. https://urn.nsk.hr/urn:nbn:hr:179:907275

Rupčić, I. (2022). 'Proračun struja dvostrukog zemljospoja i parcijalnih struja kroz tlo prema HRN EN 60909-3', Master's thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, accessed 23 April 2024, https://urn.nsk.hr/urn:nbn:hr:179:907275

Rupčić I. Proračun struja dvostrukog zemljospoja i parcijalnih struja kroz tlo prema HRN EN 60909-3 [Master's thesis]. Split: University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture; 2022 [cited 2024 April 23] Available at: https://urn.nsk.hr/urn:nbn:hr:179:907275

I. Rupčić, "Proračun struja dvostrukog zemljospoja i parcijalnih struja kroz tlo prema HRN EN 60909-3", Master's thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:179:907275

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Metadata
TitleProračun struja dvostrukog zemljospoja i parcijalnih struja kroz tlo prema HRN EN 60909-3
Title (english)Calculation of currents during two separate simultaneous line-to-earth short circuits and partial currents through earth according to croatian standard HRN EN 60909-3
AuthorIva Rupčić
MentorTonći Modrić https://orcid.org/0000-0002-1411-1591 (mentor)
GranterUniversity of Split
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture
(Department of Power Engineering)
Split
Defense date and country2022-07-21, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Power Engineering
Abstract
U ovom diplomskom radu detaljno je opisana hrvatska norma HRN EN 60909-3 te su dani primjeri proračuna u programu NEPLAN u skladu s korištenom normom. U trećem dijelu norme HRN EN 60909 opisani su postupci za proračun struja tijekom dva odvojena istovremena zemljospoja u sustavima s izoliranim ili rezonantno uzemljenim zvjezdištem, kao i proračun parcijalnih struja kroz tlo u slučaju jednostrukog zemljospoja u kruto uzemljenim ili maloomski uzemljenim sustavima. U drugom poglavlju navedene su trenutno važeće hrvatske norme HRN EN 60909. Opisane su definicije veličina koje se koriste za potrebe ovog standarda te su dane pripadne formule. U trećem poglavlju opisane su početna simetrična struja kratkog spoja, udarna (vršna) struja kratkog spoja, prekidna simetrična struja kratkog spoja te trajna struja kratkog spoja. Opisana je raspodjela struja zemljospoja tijekom dva odvojena istovremena zemljospoja te su dani pripadni primjeri. Četvrto poglavlje opisuje parcijalne struje kroz tlo u slučaju zemljospoja u trafostanici, izvan trafostanice te u blizini trafostanice. Također je opisan proračun redukcijskog faktora za nadzemne vodove sa zaštitnom užadi. Peto poglavlje opisuje proračun redukcijskog faktora i raspodjele struje u slučaju kabela s metalnim plaštom (oklopom) uzemljenim na oba kraja. Razmotren je slučaj trožilnog kabela i tri jednožilna kabela. U šestom poglavlju opisan je program NEPLAN koji je korišten za tri primjera na kojima su izvedena dva odvojena istovremena jednofazna kratka spoja. Također su prikazani i primjeri proračuna parcijalnih struja kroz tlo u slučaju zemljospoja u trafostanici te primjer proračuna redukcijskog faktora i raspodjele struja kroz tlo u slučaju zemljospoja u trafostanici napajanoj trožilnim kabelom, preuzeti iz norme HRN EN 60909-3.
Abstract (english)
In this thesis, the Croatian standard HRN EN 60909-3 is described in detail, and examples of calculations in the NEPLAN program are given in accordance with the used standard. The HRN EN 60909-3 standard describes the procedures for the calculation of currents during two separate simultaneous line-to-earth short circuits in isolated neutral or resonant earthed neutral systems, as well as the calculation of partial currents through earth in case of a single line-toearth short circuit in solidly earthed or low-impedance earthed neutral systems. In the second chapter, the currently valid Croatian standards HRN EN 60909 are listed. The definitions of quantities used for the purposes of this standard are described and the corresponding formulas are given. The third chapter describes the initial symmetrical short circuit current, peak short circuit current, symmetrical short circuit breaking current and steady-state short circuit current. The distribution of the currents during two separate simultaneous line to earth short circuits is described and the corresponding examples are given. The fourth chapter describes partial short circuit currents flowing through earth in the case of the line-to-earth short circuit inside a station, outside a station and in the vicinity of a station. The calculation of the reduction factor for overhead lines with earth wires is also described. The fifth chapter describes the calculation of the reduction factor and current distribution in the case of cables with metallic sheath (shield) earthed at both ends. The case of a three-core cable and three single-core cables was considered. In the sixth chapter, the NEPLAN program is described, which was used for three examples of single-phase short circuits. An examples of the calculation of partial currents through earth in the case of line-to-earth short circuit in a station, as well as the calculation of the reduction factor and current distribution in the case of line-to-earth short circuit in a station powered by a three-core cable are also presented, taken from the HRN EN 60909-3 standard.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:179:907275
Study programmeTitle: Electrical Engineering
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike (magistar/magistra inženjer/inženjerka elektrotehnike)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to authenticated users
Terms of useLicence In copyright icon
Created on2023-06-27 09:25:16