Impact of Superconducting Resistive-FCL on MMC-HVDC Fault

To meet with the growing demand for energy, Renewable energy transmission is feasible with Modular Multilevel Converter (MMC). Although, the chances of short-circuit fault in High Voltage Direct Current (HVDC) systems is prevalent. This large fault current could endanger the electrical integrity of the system leading to overheating and collapse of the grid. Considering the high cost of the system equipment, in addition to ensuring power reliability, it is obligatory to minimize the harmful effects of the fault current. Therefore, a Superconducting Resistive-Fault Current Limiter (RFCL) will be placed on the DC side of an MMC model to achieve a suppression rate of about 30-50% of the fault current. This limiter has quick response to fault, however, the AC loss associated with its conductor could be relatively high. For economic reasons, its conductors are made of YBCO and then wound facing each other with polyimide tapes to alter the electromagnetic field and promote the utilization efficiency of the limiter. For this report, we aim to analyse the electrical properties of the superconducting RFCL during fault. The modelling of the superconducting RFCL will be done on MATLAB Simulink and then installed on a dynamic MMC-HVDC network for result validation.