Zasnova in razvoj merilnega sistema na osnovi tuljav Rogowski v števcih električne energije

SEIFERT, NINA (avtor), Agrež, Dušan (mentor)

Zaradi vse večje konkurenčnosti na trgu števcev električne energije, se vse več podjetij prizadeva za zmanjšanje cen proizvodnje in tudi sestavnega materiala števca. Pri podjetju Iskraemeco d.d. si prizadevajo za čim cenejšo izvedbo merilnega dela, saj analogni del tega doprinese večino stroškov dela in materiala. Novi števec bi tako zmanjšal ceno materiala, saj naj ne bi potreboval dodatnih sestavnih delov senzorja. Tuljava Rogowski, v kolikor je dovolj dobro navita, je imuna na vplive zunanjega magnetnega polja in enosmerno komponento, zato ne potrebuje zapletenega in dragega oklopa. Prav tako ne potrebujemo dodatnih plastičnih delov za postavitev tuljav v števec, saj je merilni del novega števca zelo preprosto zasnovan. Preden gre lahko tak števec v produkcijo, potrebuje kvalifikacijo oz. validacijo merilnega dela števca. Ta poteka po utečenem postopku, v skladu z že uveljavljenimi evropskimi standardi. Prav tako je potrebna analiza stabilnosti procesa izdelave, ki je v večji meri odvisna predvsem od ponovljivosti navijanja tuljav, kar neposredno pomeni boljšo natančnost in točnost števca. Postopek validacije števca električne energije z merilnim delom sestavljenim iz treh tuljav Rogowski je predstavljen v tej magistrski nalogi.

• Jezik: Slovenski jezik
• Ključne besede: števec električne energije, tuljava Rogowski, magnetno polje, elektrotstatično polje, virtualna masa, navitje, kalibracija, ubežniki, Cpk, območje zaupanja, oklop, standardi
• Vrsta gradiva: Magistrsko delo/naloga
• Organizacija: FE - Fakulteta za elektrotehniko
• Leto izida: 2021
• PID: 20.500.12556/RUL-125078
• Datum objave v RUL: 04.03.2021

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Design and development of a measurement system based on Rogowski coils in electricity meters

Izvleček

Due to the growing competitiveness in the electricity meter market, more and more companies are striving to reduce production as well as the meter's component material costs. At Iskraemeco d.d. they strive to make the measurement part of the electricity meter as cheap as possible since the analog part of this part contributes most of the labor and material costs. The new meter would thus reduce the cost of the material, as it would not need additional sensor components. The Rogowski coil, if wound well enough, is immune to the effects of an external magnetic field and a one-way component, so it does not need complex and expensive shielding. We also do not need additional plastic parts to position the coils in the meter, as the measurement part of the new meter is very simply designed. However, before such a meter can go into production, it needs a qualification or validation of the measuring part of the meter. This is done according to the routine procedure, in accordance with already established European standards. It is also necessary to analyze the stability of the manufacturing process, which largely depends on the repeatability of the winding of the coils, which directly means better accuracy and precision of the meter. The process of validation of an electricity meter with a measuring part consisting of three Rogowski coils is presented in this master's thesis.

• Ključne besede: electricity meter, Rogowski coil, magnetic field, electrostatic field, virtual mass, winding, calibration, outliers, Cpk, confidence interval, shield, standards