Voltage Stability Margin Enhancement Using Evolutionary Programming (EP)

System violation in a power system resulted from the spectacular voltage drop caused by the overloading condition has become a serious problem these days. This incident has occurred in the presence of voltage instability which has partly contributed to the monetary losses resulted from the failure transmission process. Limited operating margin in power operating system has also caused such system experienced lack of reactive power support. Therefore, voltage stability margin enhancement could be planned in order to alleviate the voltage instability occurrence which could lead to cascaded blackout in a system. This paper presents voltage stability margin (VSM) enhancement using optimal reactive power support, achieved using evolutionary programming (EP) technique. The implementation of optimal reactive power dispatch as the reactive support technique has resulted promising results in terms of broadening the VSM, along with voltage stability and voltage profile improvement with transmission losses minimized. Realization of the proposed technique on an IEEE model validated the effectiveness of the technique which can be highlighted as its merit.