Modeling Features of a Single Phase-to-Earth Fault in a Medium Voltage Overhead Transmission Line

Authors

  • Ismael Kareem Saeed Electrical Department, College of Engineering, Salahaddin University – Erbil, Erbil, Iraq
  • Kamal Sheikhyounis Electrical Department, College of Engineering, Salahaddin University – Erbil, Erbil, Kusiarn Region- F. R. Iraq.

DOI:

https://doi.org/10.25079/ukhjse.v4n2y2020.pp127-138

Keywords:

Power system, Single-phase to earth fault, Overhead transmission lines

Abstract

The modeling and calculation of a single phase-to-earth fault of 6 to 35 kV have specific features when compared with circuits with higher nominal voltages. In this paper, a mathematical analysis and modeling of a 3-phase overhead transmission line with distributed parameters consisting of several nominal T-shaped, 3-phase links with concentrated parameters replaced by 1 nominal T-shaped link were carried out. Further analysis showed that not accounting for the distributed nature of the line parameters did not cause significant errors in the assessment of the maximum overvoltage in the arc suppression in single phase-to-earth faults, and that sufficient accuracy insures the representation of the line by only 1 nominal T-shaped, 3-phase link. Such a modeling technique makes it impossible to identify the location of single-phase faults, which is the property of higher harmonic amplification of individual frequencies. Chain equivalent schemas with constant parameters are valid for a single frequency, thereby providing an opportunity to study the nature of the wave process by the discrete selection of parameters. Next in the mathematical representation, we consider the overhead transmission lines as lines with distributed parameters.

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Author Biographies

  • Ismael Kareem Saeed, Electrical Department, College of Engineering, Salahaddin University – Erbil, Erbil, Iraq
    Ismael Kareem Saeed is an Assistant Professor of Electrical Engineering. He works at the Electrical Department, College of Engineering, Salahaddin University – Erbil, Erbil, Iraq. His area of interest are Electrical Power System, Applications of Fuzzy Logic and Artificial Neural Networks.  
  • Kamal Sheikhyounis, Electrical Department, College of Engineering, Salahaddin University – Erbil, Erbil, Kusiarn Region- F. R. Iraq.

    Kamal Sheikhyounisworks is a PhD holder and works at the Electrical Department, College of Engineering, Salahaddin University – Erbil, Kurdsitan Region- F. R. Iraq. His area of interests are  Power Systems Analysis , Electrical Power Engineering, MATLAB.

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Published

2020-12-31

Issue

Vol. 4 No. 2 (2020): ISSUE 7

Section

Research Articles

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How to Cite

Modeling Features of a Single Phase-to-Earth Fault in a Medium Voltage Overhead Transmission Line. (2020). UKH Journal of Science and Engineering, 4(2), 127-138. https://doi.org/10.25079/ukhjse.v4n2y2020.pp127-138