Voltage Stability Margin Enhancement by Optimal Control of Upfc Using Hybrid Algorithm

In the present scenario of the power system the main issue is the voltage stability enhancement which plays an important role in the complex network. This paper introduces the forthcoming technology employing the integration of Flexible AC transmission System (FACTS) device in to the system. Betwixt of all the FACTS devices this paper mainly rivet on Unified Power Flow Controller (UPFC). This is because UPFC has the aid to manage voltage, phase, and reactive power. A hybrid algorithm is developed for the improvement of voltage stability of the power system and to optimize the FACTS controller. The hybrid algorithm abide combination of Particle Swarm Optimization (PSO) and Gravitational Search Algorithm (GSA). PSO is performed to pinpoint the location of the UPFC device in the power system network. Whereas GSA is implemented to optimize UPFC device rating in a sequence. This method proposed was done for IEEE-14 bus system and IEEE-30 bus system using MATLAB platform. The results were impressive by the prospective method for practical applications. Keywords—Voltage Stability, UPFC, FACTS, PSO, GSA