Abstract
Many industrial loads suffer from various power quality problems like voltage sag and swell, service outages etc. Due to these power quality issues industrial customer bears huge financial loss. So in this situation static transfer switch can be the most cost effective solution to avoid from these problems. Thyristor based Static transfer switch is used to protect industrial load from these power quality problems by transferring sensitive load from one source to another within minimum transfer time. This paper investigates the performance of thyristor switches based STS system by improving the power quality of a sensitive three-phase industrial load. Extensive simulations are carried out to validate the use of thyristor switches in medium voltage systems to achieve a lesser transfer time in network reconfiguration. Performance analysis of thyristor based STS system is carried out under various faults/disturbance conditions. Simulation results obtained from MATLAB/Simulink verifies the performance of static transfer switch.
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