Performance Evaluation of a MW-Class SMES-Based DVR and SFCL for Enhancing Transient Voltage Quality

Design and performance evaluation of a MW-class dynamic voltage restorer (DVR) and Superconducting Fault Current Limiter (SFCL) combined scheme is presented for current limitation and mitigation of voltage sag disturbances. A 0.3-H/1.76-kA superconducting magnetic energy storage (SMES) and SFCL device are structurally designed for MW-class power exchange operations. Simulation cases with regard to severe grid fault are carried out. Simulations results have demonstrated that the stabilizations of load voltages, and the suppressions of voltage sag and fault current come mainly from the cooperative operation of the SFCL and the fast-response SMES based DVR device.