Trofazni strujno-naponski kalibrator

scientific master's theses

• Title (english): Three – phase current and voltage calibrator
• Author: Luka Ferković
• Mentor: Mladen Boršić (mentor)
• Committee member: Mladen Boršić (predsjednik povjerenstva)
• Committee member: Zoran Stare (član povjerenstva)
• Committee member: Tomislav Kilić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; (Department of Electrical Engineering Fundamentals and Measurements); Zagreb
• Defense date and country: 2004, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering; Power Engineering
• Universal decimal classification (UDC): 621.3 - Electrical engineering

Abstract

U visokonaponskim se prijenosnim mrežama, uvođenjem novog obračunskog mjernog sustava, ukazala potreba za preciznim određivanjem nesigurnosti mjerenja električne energije. Nadzor rada mjernog sustava zasniva se na redovitoj provjeri onih parametara koji utječu na mjernu nesigurnost. Za mjerenje nekih od tih parametara potrebno je razviti posebni mjerni uređaj prilagođen radnim uvjetima na obračunskim mjernim mjestima visokonaponske prijenosne mreže. Temeljem analize zahtjeva mjernog sustava, predloženo je i razrađeno tehničko rješenje uređaja za mjerenje impedancija vodova i tereta u niskonaponskim petljama naponskih i strujnih mjernih transformatora visokonaponske prijenosne mreže. Gotov kalibrator na svojim izlazima daje trofazni napon i trofaznu struju s mogućnošću regulacije tih veličina u opsegu od 10 % do 120 % njihovih nazivnih iznosa (UN = 100/ 3 V, IN = 1 A i 5 A). Kalibrator ima predviđenu regulaciju faznog pomaka φ između struje i napona u opsegu od 0º do 360º. Značajke i funkcionalnost izvedenog uređaja provjerene su u Primarnom elektromagnetnom laboratoriju te je, temeljem pokusa i ocjena sastavnica vrste "B" nesigurnosti, procijenjena mjerna nesigurnost postavnih vrijednosti izlaznih veličina.

Abstract (english)

With introduction of new accounting measuring system in high-voltage networks, there is a require for accurate determining of energy measurement uncertainty. Monitoring of measuring system is based on regulary inspections of parameters which have influence on measurement uncertainty. Determination of these parameters needs a special measuring instrument which is adapted to working conditions in accounting measuring system. Based on measuring system analysis, the instrument tehnical solution for transformer loads measurement was proposed and elaborated. Finished calibrator provides three-phase voltage and three-phase current with possibility of regulation in volume 10 % − 120 % of its nominal quantity (UN = 100/ 3 V, IN = 1 A and 5 A). The regulation of phase shift φ between current and voltage in volume 0º − 360º is also possible. The characteristics and functionality of instrument were tested in Primary Electromagnetic Laboratory. Based on experiments and evaluations of uncertainty "B", total uncertainty estimation of output quantities was made.

• Keywords: mjerenje tereta mjernih transformatora; trofazni sustav; kalibracija napona; struje i faze
• Keywords (english): transformers load measurements; three–phase system; calibration of voltage; current and phase
• Language: croatian
• URN:NBN: urn:nbn:hr:168:945341
• 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)
• Catalog URL: https://lib.fer.hr:8443/cgi-bin/koha/catalogue/detail.pl?biblionumber=29265&searchid=scs_1571823099949
• Type of resource: Text
• Extent: 67 str. ; 30 cm
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-10-23 09:57:33