Tehničke karakteristike prijenosnih nadzemnih vodova s vodičima u snopu

master's thesis

• Title (english): Technical characteristics of overhead transmission lines with bundle conductors
• Author: Ante Ravlić
• Mentor: Ivica Pavić (mentor)
• Committee member: Ivica Pavić (predsjednik povjerenstva)
• Committee member: Ante Marušić (član povjerenstva)
• Committee member: Viktor Milardić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2016-07-05, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U slučaju nadzemnih vodova nazivnih napona viših od 245 kV za svaku fazu se uobičajeno ugrađuju dva ili više vodiča, koji su uzduž voda međusobno spojeni na određenom razmaku (vodiči u snopu). Snop se upotrebljava s ciljem povećanja dozvoljenog trajnog strujnog opterećenja voda, kao i s ciljem izbjegavanja pojave korone (električnog izbijanja uzrokovanog jakim električnim poljem uz vodič). Uz određene meteorološke uvjete koji pogoduju stvaranju iona, korona se opaža na prostoru oko vodiča nadzemnog voda. Pojava djeluje korozivno, a uzrokuje i gubitke električne energije, pa se pri projektiranju nadzemnih vodova pojava korone treba smanjiti na najmanju moguću vrijednost.

Tehno-ekonomska analiza je pokazala da je značajno isplativija investicija izgradnje novog 400 kV voda koji bi povezao 400 kV postrojenja KONJSKO i BRINJE, nego ugradnja dva vodiča u snopu na 220 kV vodu koji je već u pogonu. Iako navedeni zaključak zvuči nelogično, jer je izgradnja novog voda skuplje rješenje, uštede zbog smanjenja gubitaka bi bile višestruko veće, a samim time bi bilo lakše isplatiti investiciju.

Abstract (english)

In case of overhead lines with nominal voltages higher than 245 kV two or more conductors for each phase are usually installed. Two or more conductors are in this case connected with each other at a specific distance along the line (bundled conductors). The bundle is used to increase the permissible permanent current load of the overhead line, as well as to avoid the appearance of the corona (electrical discharge brought on by the ionization of a fluid surrounding a conductor that is electrically charged). Under certain meteorological conditions that favor the formation of ions, the corona is observed in the area around the conductor of overhead line. This phenomenon is corrosive and causes the loss of electrical energy, so while designing of overhead power lines corona should be reduced to the lowest possible value.

Techno-economic analysis showed that construction of a new 400 kV overhead line that would connect 400 kV substations KONJSKO and BRINJE is a much better investment than the installation of two bundled conductors on the 220 kV overhead power line which is already in operation. While this may at first sound illogical, because the construction of a new overhead power line is more expensive solution, cost savings due to reduced losses would be several times higher, and therefore it would be easier to pay off the investment.

• Keywords: vodiči u snopu; korona; ETAP; tokovi snaga; gubici djelatne snage; tehno-ekonomska analiza
• Keywords (english): bundled conductors; corona; ETAP; power flow; active power losses; techno-economic analysis
• Language: croatian
• URN:NBN: urn:nbn:hr:168:676007
• 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: 2018-02-06 11:33:48