Modeliranje elementov in izračun pretokov moči v distribucijskem omrežju

Alagić, Elvis (author), Blažič, Boštjan (mentor)

Namen dela je prikaz modeliranja elementov distribucijskega omrežja in izračuna pretokov moči v tem omrežju. Pri tem so upoštevane specifike distribucijskega omrežja, kot so ozemljitve vodov in transformatorjev ter upoštevanje nesimetričnosti impedanc omrežja. Uporaba modela omrežja je prikazana na primeru izračuna napetosti in tokov nizkonapetostnega (NN) kabla z upoštevanjem različnih vrednosti upornosti ozemljitve nevtralnega vodnika. Za izračun napetosti in tokov za omrežje v normalnem obratovanju je bila uporabljena lestvična metoda (iteracijska metoda). Analiziral sem tokovne in napetostne razmere NN-kabla za simetrično breme, nesimetrično breme, simetrični vir in nesimetrični vir. Na koncu je modeliran kratkostični model omrežja, ki omogoča izračun napetosti in tokov pri enopolnem zemeljskem stiku, dvopolnem KS, dvopolnem KS z dotikom zemlje, tripolnem KS in tripolnem KS z dotikom zemlje, pri tem bremena niso upoštevana.

• Language: Slovenian
• Keywords: radialno omrežje, SN-nadzemni vod, matematični model trifaznega distribucijskega transformatorja, vezava Dyn1, NN-kabel, bremena s konstantno močjo, ozemljilne palice, lestvična metoda, kratkostični model.
• Work type: Master's thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2015
• PID: 20.500.12556/RUL-72483
• Publication date in RUL: 22.09.2015

ALAGIĆ, Elvis, 2015, Modeliranje elementov in izračun pretokov moči v distribucijskem omrežju [online]. Master’s thesis. [Accessed 25 March 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=72483

Secondary language

• Language: English
• Title: Distribution-system elements modelling and power-flow calculation

Abstract

The purpose of the task is to show the elements of the distribution network modeling and calculation of power flows on the network. This takes into account the specifics of the distribution network, such as grounding lines and transformers and consideration skewing network impedances. Using the network model is shown in the case of the calculation of voltages and currents NN cable taking into account the different levels of resistance grounding neutral conductor. To calculate voltages and currents for the Network under normal condition due to non-linear loads used ladder method (iterative methods). I analyzed current and voltage conditions NN cable for symmetric load, source and asymmetric load, source. At the end I modeled short-circuit network model, which allows the calculation of voltages and currents in the one phase SC with earth contact, two phase SC, two phase SC with earth contact, three phase SC and 3 phase SC with a touch of earth where loads are not taken into account.

• Keywords: radial network, MV overhead line, a mathematical model of a three-phase distribution transformer, Dyn1 binding, LV cable, load with constant power, earthing rods, ladder method, shortcircuit model.