Voltage Source Converters (VSC) are used by the OUPFC, a FACTS controller, to account for shunt and series losses in multiline transmission networks. The OUPFC has improved system efficiency and offers the same control capabilities as comparable devices at a lower cost. This OUPFC device is installed in the gearbox line to reduce the various power quality issues in the gearbox system, such as voltage sag, current swell, and total harmonic distortion.Low frequency power oscillations are a major issue that reduces the effectiveness of the power system. To get over these restrictions, OUPFC with POD controller is utilised to eliminate low frequency power fluctuations in the gearbox system. This study employs PID and POD controllers to monitor the efficacy of the results. The recommended findings are validated and their efficacy is evaluated using MATLAB/SIMULINK software.