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Global Voltage Stability Analysis of a Power System Using Network Equivalencing Technique in the presence of TCSC

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Author(s): Sunita Halder nee DEY | Palukuru NAGENDRA | Subrata PAUL

Journal: Leonardo Electronic Journal of Practices and Technologies
ISSN 1583-1078

Volume: 9;
Issue: 16;
Start page: 53;
Date: 2010;
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Keywords: Global Voltage Stability | Network Equivalence | Weakest Bus

ABSTRACT
This paper presents a methodology for assessing the voltage stability using the concept of equivalencing the multi-bus power system to a two-bus network model and by studying the necessary parameters of the equivalent system. There by, a generalized global voltage stability indicator being developed, it has been applied to a robust practical 203-bus Indian Eastern Grid system. Simulation results indicate that this optimal power flow (OPF) based network equivalent approach is promising to assess voltage stability of any power system at any operating point in global scenario. In addition, the application of thyristor controlled series capacitor (TCSC) compensator at critical line indicates the improvement of global voltage stability at all operating conditions. In the equivalent network the generators are modeled more accurately considering economic criteria.
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