Abstract
A MATLAB/GUI (Graphical User Interface) based simulation tool has been developed to calculate the short-circuit fault currents in power transmission lines and to use as an educational material for courses on power system analysis. Presented program provides the calculation of three-phase (3LS), single line-to-ground (1LG), line-to-line (2LS), and double line-to-ground (2LG) faults on transmission lines. Symmetrical components of currents and voltages are used for calculations in the program. By means of the program, calculated fault currents and voltages on the fault point of the line have been presented both in per-unit and in real values. Furthermore, this calculated currents and voltages can be observed in GUI screen. In this way, an educational tool has been developed for the students to check the accuracy of their calculations and to observe the variations of waveforms. The purpose of this GUI based tool is to help the student to understand the concept of symmetrical components and short-circuit faults.
Highlights
There are a number of different types of faults that may occur in power systems
Three phase symmetrical fault occurs in three phase systems where the phase conductors are in contact with each other
A single phase to ground fault occurs between a phase conductor and neutral conductor or ground conductor in three phase grounded neutral systems
Summary
There are a number of different types of faults that may occur in power systems. Three phase symmetrical fault occurs in three phase systems where the phase conductors are in contact with each other. One reason for the difficulty can be attributed to the increased numerical complexity in dealing with the symmetrical components in the unbalanced three phase environment This complexity leads to a loss of focus and lack of understanding of the basic processes affecting the values of currents and voltages after the occurrence of a fault and the students become indifferent to the variation in the results from one type of fault to another [1]. A MATLAB/GUI (Graphical User Interface) based simulation tool has been developed to calculate the short-circuit fault currents in power transmission lines. This simulation tool can be used as an educational material for course of power system analysis. The students are able to see the graphical variations of fault currents and voltages in GUI screen
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