Island Operation Modes XS800 UHVDC System

In accordance with the Xiangjiaba-Shanghai UHVDC(XS800) island operation,2 different control strategies were discussed for entering island mode and island mode operation.Power exchange limits under some scenarios as well as communication and frequency control model and parameters were proposed.Simulation on the fault cases indicate that the XS800 UHVDC system can maintain stable operation with the help of designed frequency control block.