Modeliranje tokovnega merilnega transformatorja

HANDŽAR, ADI (author), Agrež, Dušan (mentor)

Magistrsko delo opisuje modeliranje vpliva vhodnega toka in zunanje temperature na točnost merjenja tokovnega merilnega transformatorja, ki ga v samem števcu električne energije uporabljamo kot senzor za merjenje električnega toka. Pridobljeni regresijski model je bil uporabljen pri programiranju kompenzacije v vdelani programski opremi. V prvem koraku smo preučili vrste tokovnih senzorjev in opisali tokovni transformator. V drugem koraku je opisan postopek kalibracije števcev električne energije. V tretjem koraku je opisano matematično ozadje modeliranja. V četrtem koraku je predstavljen postopek meritev, ki smo jih izvajali na tokovnem merilnem transformatorju. Na koncu je opisana vizualizacija podatkov s programskim jezikom Python.

• Language: Slovenian
• Keywords: števec električne energije, tokovni merilni transformator, kalibracija, standardi, polinomska regresija, Python
• Work type: Master's thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2022
• PID: 20.500.12556/RUL-141042
• COBISS.SI-ID: 122736643
• Publication date in RUL: 22.09.2022

Secondary language

• Language: English
• Title: Modeling of current measuring transformer

Abstract

The master's thesis describes the modeling of the influence of input current and outdoor temperature on the measurement accuracy of a current measuring transformer, which is used in the electricity meter as a sensor for measuring electric current. The obtained regression model was used in the programming of the compensation in the firmware. Firstly, we examined the types of current sensors and described the current transformer. Secondly, we described the calibration procedure of electricity meters. Thirdly, we described the mathematical background of the modeling. Fourthly, the procedure of measurements performed on the current measuring transformer is presented. Lastly, data visualization with the Python programming language is described.

• Keywords: electricity meter, current measuring transformer, calibration, standards, polynomial regression, Python