Odabir vodiča za nadzemne vodove visokih i vrlo visokih napona s obzirom na pojavu korone

scientific master's theses

• Author: Denisa Galzina
• Mentor: Srđan Babić (mentor)
• Committee member: Sejid Tešnjak (predsjednik povjerenstva)
• Committee member: Srđan Babić (član povjerenstva)
• Committee member: Tomo Bosanac (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2000-05-05, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering
• Universal decimal classification (UDC): 621.3 - Electrical engineering

Abstract

Do pojave korone na površini prijenosnog voda dolazi kada jakost električnog polja na površini vodiča prijeđe električnu čvrstoću zraka. Probojem zraka dolazi do pojave svjetlosti, čujne buke, radio smetnji, vibracija vodiča, proizvodnje ozona i disipacije energije, koju moramo dodatno proizvesti.
Temperatura vodiča ovisi o teretu, električnim karakteristikama vodiča, te atmosferskim uvjetima. Povećanjem gubitaka korone smanjuje se maksimalni dozvoljeni teret na vodu.
U radu je teoretski obrađena pojava korone i njenih gubitaka, pokazani su rezultati proračuna gubitaka korone, te je pokazano kako oni utječu na zagrijavanje vodiča.

Abstract (english)

Corona discharges form at the surface of a transmission line conductor, when the electric field intensity on the conductor surface exceeds the breakdown strength of air. The breakdown of air generates light, audible noise, radio noise, conductor vibration, ozone, and causes a dissipation of energy that must be supplied by the power station.
The conductor temperature depends on the load current, the electrical characteristics of the conductor, and the atmospheric parameters. Increasing corona loss will cause decreasing maximum allowable load current.
The work gives the theoretical knowledge of corona phenomena and its loss, the results of calculation of corona loss are shown, and it is also shown the way the corona loss affect thermal behavior of the conductor.

• Keywords: Nadzemni vodovi; pojava korone; gubici korone; zagrijavanje vodiča
• Keywords (english): Overhead lines; corona phenomena; corona losses; conductor heating
• Language: croatian
• URN:NBN: urn:nbn:hr:168:145583
• Study programme: Title: Postgraduate master programme in electrical engineering; Study programme type: university; Study level: postgraduate; Academic / professional title: Magistar znanosti elektrotehnike (Magistar znanosti elektrotehnike)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-04-03 12:15:42