An Efficient Fuzzy Logic Controlled-SMES for Isolated-Microgrid System Considering High Wind Power Penetration

Nowadays, several microgrid (MG) integration issues are interested and must be highlighted. Due to wind power is highly dependent on wind speed, which is naturally variable, severe stability problems can be caused in power systems, especially when the wind power has a high penetration level. To improve the stability of the MG, the control actions need to be more robust and efficient. Hence, this paper proposes the use of an energy storage system (ESS) based on Superconducting Magnetic Energy Storage (SMES), which uses the Fuzzy Logic Control (FLC) with power electronic technology to control the power transfer from/to the MG. Furthermore, the reactive power of the SMES is controlled using voltage source converter (VSC) to mitigate the voltage fluctuations. This control strategy has been tested out using different scenarios of wind speed gust, load shedding and loads restoring, which highly influence the power system operation. To prove the efficient performance of the proposed control strategy, an isolated MG comprises of squirrel cage induction generators (SCIG) as a wind turbine generator (WTG) and diesel synchronous generators; was investigated for the simulation using MATLAB/Simulink. Moreover, the proposed technique is compared with the conventional energy storage device like DC batteries. The obtained simulation results stated that the SMES based-FLC achieved superior dynamic responses satisfying the stability requirements in all test scenarios.