Artificial Bee Colony Algorithm for optimal Reactive Power Dispatch to Improve Voltage Stability

Several traditional and Artificial Intelligence techniques have been proposed for reactive power dispatch to improve voltage stability of the system. This paper presents Artificial Bee Colony (ABC) Algorithm approach for system parameters enhancement and optimal reactive power dispatch. The transformers tap changers, Generator exciters, switchable VAR sources/Static VAR compensators (SVC) are used as control variables for improvement of system parameters and voltage stability. The proposed methodology is based on the minimization of voltage deviations at all load buses. The developed ABC Algorithm is tested on an IEEE Equivalent practical Indian 24-bus system. The performance of ABC is compared with conventional Linear Programming (LP) method and results are presented for illustration purpose. The correctiveness of voltage stability is measured in terms of system parameters.