Abstract:

                             With the increasing size of power system, there is a thrust on finding the solution to maximize the utilization of existing system and to provide adequate voltage support. For this the flexibility of power is needed. Flexible AC transmission system (FACTS) if placed optimally can be effective in providing voltage support, controlling power flow and in turn resulting into lower losses.

The algorithm to find the optimal location of UPFC based on genetic algorithm has been developed. The effect of these devices on line flows and bus voltage profile has been studied by placing at random location and placing them optimally with optimal ratings dictated by genetic algorithm. The effectiveness of developed algorithm has been tested on 14-bus systems. In this work, a comparison of the effects of compensation of a Simplified multi-machine (two-machine system) power system by shunt/series connected FACTS controllers at optimal location using GA. The model procedure of enhance voltage stability and power flows capability of systems is illustrated. The study system is a simple example of multi-machine system, which is simulated in MATLAB/PSAT.

Keywords- UPFC(unified power flow controller),PSAT(Power system analysis toolbox), GA(Genetic Algorithm)