Evaluation of Steady State Voltage Stability Margin of a Power System Using Search Group Algorithm

The rapid increase in load demand forces power systems to operate critically to meet the economic and environmental constraints. The stability margins are being further diminished in reacting to market pressures, which demand greater interest to reduce operating costs. The overall stability limits are closely allied with the voltage stability of the network. Therefore, the voltage stability is a significant study in the operation and planning of a power system. This paper describes a metaheuristic algorithm, Search group algorithm (SGA) to determine the maximum loadability point of the power system. The proposed algorithm aims at having a good balance between the exploration and exploitation of the design domain. The effectiveness of the proposed method is evaluated using the IEEE 118 bus system; prove its validity and applicability to other power system problems. The results show that the Search group algorithm has a rapid convergence speed.