Voltage collapse prediction incorporating both static and dynamic analyses

Muhammad Nizam, Azah Mohamed, Aini Hussain

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This paper presents a combined static and dynamic voltage collapse analysis for the purpose of achieving fast voltage collapse prediction. In the proposed method, static analysis is first carried out by evaluating the power transfer stability indices (PTSI) at several contingency cases and perform contingency ranking so as to determine the critical contingencies with respect to voltage instability. The critical contingencies will determine the critical load buses, line outages and generator outages as well as the weak buses in the study system. Then, dynamic simulations are carried out only for the critical contingency cases to capture the full dynamic behavior of the system and to show the time events that lead the system to final phases of voltage collapse. The performance of the PTSI is evaluated for its accuracy in predicting voltage collapse by comparing it with the eigenvalue analysis. To evaluate and illustrate the effectiveness of the proposed PTSI, simulations were carried out on the IEEE 39 bus test system using the Power System Analysis Toolbox. A control strategy for preventing voltage collapse is also investigated by means of using the under load tap changer (ULTC). Contingency ranking simulation results indicate the severity of voltage instability condition in a power system due to load increase and outages of line and generator. For dynamic voltage collapse prediction, the PTSI is more accurate and gives a better voltage collapse indication. For voltage collapse control strategy, proper placement of ULTC can prolong the voltage collapse incidence.

Original languageEnglish
Pages (from-to)10-25
Number of pages16
JournalEuropean Journal of Scientific Research
Volume16
Issue number1
Publication statusPublished - 2007

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Motor Vehicles
Voltage
prediction
Prediction
Electric potential
Stability Index
Systems Analysis
Outages
systems analysis
ranking
Incidence
Power System
incidence
Control Strategy
Ranking
simulation
critical load
Generator
Eigenvalue Analysis
eigenvalue

Keywords

  • Dynamic analysis
  • Static analysis
  • Voltage Collapse

ASJC Scopus subject areas

  • General

Cite this

Voltage collapse prediction incorporating both static and dynamic analyses. / Nizam, Muhammad; Mohamed, Azah; Hussain, Aini.

In: European Journal of Scientific Research, Vol. 16, No. 1, 2007, p. 10-25.

Research output: Contribution to journalArticle

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