Enhanced Control of Offshore Wind Farms Connected to MTDC Network Using Partially Selective DC Fault Protection

In recent years, several dc fault clearance schemes have emerged, in which the reduced number of fast-acting circuit breakers (DCCBs) and ac (ACCBs) are used to clear faults. offshore grids, such approach entails opening ACCBs that connect wind farms high-voltage (HVDC) stations control voltages frequencies, potentially leading uncontrolled voltage frequency. Existing studies show loss converter due blocking or sudden can cause significant overvoltage overfrequency grid, could necessitate an immediate shutdown farm. Enhanced for turbine converters (WTCs) farm is proposed enable retention frequency when lost, seamless transition WTCs between grid following forming modes facilitated. The viability demonstrated a wider context partially selective protection illustrative meshed includes detailed implementations clearance, system restart, power transfer resumption. presented simulation results confirm effectiveness WTC preventing excessive rise facilitating ride-through using DCCBs.