Mitigation of Voltage Sag/Swell using Custom Power Devices with SMES System in Transmission Network
Any power problem noticed in voltage, current or frequency deviations that results in misoperation of customer or end user equipment. The new method of dynamic voltage restorer with SMES is proposed to protect consumers load from tripping .The DVR can effectively inject the voltage to the power lines. To improve the performance of DVR the superconducting magnet is selected as the energy storage unit. The compensation of the voltage sag, swell by short period of voltage injection. SMES based DVR has been used to improve the performance of power system. It is having high power rating with maximum efficiency than any other energy storage devices. It restores line voltage to its nominal value within few milliseconds. Most of the power quality problems are voltage sag, swell, interruption, transient, fluctuation, etc.. Among those power quality problem voltage sag is severe one. So it is analyzing and mitigated using custom power device and SMES system using MATLAB SIMULINK in proposed system. KeywordsPower quality, SMES, Dynamic Voltage Restorer (DVR), Voltage Source Converter (VSC), Voltage sag, PI controller.