Early Detection of Voltage Instability in Distribution System utilizing Phasor Measurement Units

Authors

  • A. Noha H. El-Amary Author
  • B. S. El Safty Author

DOI:

https://doi.org/10.24084/repqj08.560

Abstract

Power system automation leads to a great jump in

detecting and solving the system problems. Due to the serious

problems of system voltage collapse, an early prediction online

voltage instability detector is discussed in this paper. The

voltage instability detector utilizes the voltage and current

phasor readings of connected phasor measurement units to the

distribution terminals. The detector works according to two

parallel algorithms. The first algorithm is a comparison for

terminal current and voltage phasors with an offline calculated

Look-up table, in which particle swarm optimization technique

is used. The Look-up table represents the permissible maximum

current and minimum voltage phasors for each terminal. The

second algorithm is based on the online computation of the ratio

of the Thevenin equivalent system impedance to the terminal

load impedance. The simulated voltage detector is applied to

two different unified power systems. It gives good and

reasonable results.

Author Biographies

  • A. Noha H. El-Amary

    Department of Electrical and Computer Control Engineering, College of Engineering,

    Arab Academy for Science, Technology and Maritime Transport (AASTMT), Egypt.

    1. Phone:+20104718562, e-mail: noha_helamary@hotmail.com
  • B. S. El Safty

    Department of Electrical and Computer Control Engineering, College of Engineering,

    Arab Academy for Science, Technology and Maritime Transport (AASTMT), Egypt.

    1. Phone:+20106619620, e-mail: drsamahsafty@yahoo.com

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Published

2024-01-24

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Section

Articles