An Effective Control Scheme of a Back-to-Back Converter with Shunt-Connected HTS SMES for Frequency Regulation of an Islanded Microgrid

High temperature superconducting magnetic energy storage (HTS SMES) is known as aneffective solution to significantly decrease the voltage and power fluctuations of grid connected windpower generation system (WPGS). This paper implements an effective control scheme of a back-tobackconverter with shunt-connected HTS SMES for the frequency regulation of an islandedmicrogrid. The back-to-back converter is used to connect the WPGS to the grid. A large-scale HTSSMES is linked to the DC side of the back-to-back converter through a two-quadrant DC/DC chopper. An adaptive control strategy is implemented for the back-to-back converter and the two-quadrantDC/DC chopper to improve the efficiency of the whole system. The performance of the proposedcontrol system was evaluated in a test power system using PSCAD/EMTDC. The simulation resultsclearly show that the back-to-back converter with shunt-connected HTS SMES operates effectivelywith the proposed control strategy for stabilizing the power system frequency fluctuations KCI Citation Count: 3