Optimal reactive power dispatch by furnishing UPFC using multi-objective hybrid GAPSO approach for transmission loss minimisation and voltage stability

The goal of optimal reactive power dispatch is to make the transmission loss minimal in addition to control of voltage profile such that the voltage deviations at the load buses for various loading conditions. By furnishing Flexible AC Transmission System devices in the transmission system, the power control can be finely achieved. The paper describes Optimal Reactive Power Dispatch for the power loss minimisation using optimal location of Unified Power Flow Controller for loss minimisation. The power flow is first solved by Newton Raphson method without implementing or furnishing Unified Power Flow Controller and then by furnishing them randomly in the IEEE -30 bus system. Unified Power Flow Controller allows control of real and reactive power both in addition to voltage magnitude control at various buses. In this paper, optimal reactive power dispatch is applied using the hybrid GA -PSO. Simulations are performed on IEEE-30 bus test system using MATLAB software package to ensure efficacy of the proposed algorithm. This paper aims at to find the optimum usage of Unified Power Flow Controller which means the finding of the optimal location where their influence would be more useful.