Smoothing control of wind generator output fluctuations by using superconducting Magnetic Energy Storage unit

As wind turbine output is proportional to the cubic of wind speed, the wind turbine generator output fluctuates due to wind speed variations. Hence, if the power capacity of wind power generators becomes large, wind power generator output can have an influence on the power system frequency. Since Superconducting Magnetic Energy Storage (SMES) system has the ability to provide both active and reactive power simultaneously and quickly, it can improve the performance under such condition. In this study, the PWM voltage source converter and two-quadrant DC-DC chopper controlled SMES is proposed, which can significantly decrease the voltage and output power fluctuations and finally can maintain the frequency to the desired level. The simulation analyses have been performed using PSCAD/EMTDC.