DOI:
AUTHOR(S)
Md. Saiful Islam, Md. Rubel Basar, Md. Abdullah Al-Moti Pinto, Md. Towhidul Islam
ABSTRACT
Voltage stability is a critical concern in modern power systems, particularly for ensuring a safe and reliable operation under heavily loaded conditions. This study presents a static voltage stability assessment (VSA) approach applied to the IEEE 14-bus test system, focusing on the identification and ranking of load buses using PV and QV curve analysis to guide optimal reactive power compensation. Simulation results identify Bus 14 as the most vulnerable, with the lowest real power margin ( ) and reactive power margin ( ). To mitigate voltage instability, Static VAR Compensators (SVCs) and Static Capacitor (SC) banks were strategically deployed at this critical bus. Post-compensation analysis reveals a significant enhancement in voltage stability: the critical voltage at Bus 14 improved from to 0.9183 (a increase), and the real power margin increased from to . Similarly, the minimum reactive power margin improved from to , while the corresponding critical voltage rose from to . These shifts in both PV and QV curves indicate enhanced reactive power support and a stronger voltage profile.
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