Abstract
Nowadays the modern power systems are large complex systems and widely distributed geographically. The increase in demand, generator reaching reactive power limits and line/generator outages may operate the power system in stressed conditions leads to voltage instability or voltage collapse. Voltage stability has become of major concern among the power utilities, because of several events of voltage collapse occurred in the past decade. Thus the real time voltage stability assessment is essential by estimating the loadability margin of the power system. Voltage stability analysis was studied on IEEE 30 and IEEE 118 bus systems using many voltage stability indices based on line/nodal and the results are compared with the proposed new index based on SVM and ELM.
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