Black-start scheme based on EV's intelligent integrated station

With electric power network getting larger and more complex, it is unprecedented vulnerable and modern society is faced with higher blackout risk The stable and reliable operation of a power system is necessary after major emergencies (or blackouts) following a major system event. The intelligent integrated station (IIS), providing energy and changing batteries for EVs, has the ability to separate and isolate itself from the power grid seamlessly with little or no disruption to loads in the station. Then, when the utility grid returns to normal, the IIS resynchronizes and reconnects itself to the grid in an equally seamless manner. According to conventional system restoration after a black-out, the control principles of black-start for intelligent integrated station are put forward. The build-up strategy is used to restore power system with IIS, which includes the process of restoring separated parts (islands) in the power system and interconnecting them afterwards. The control of IIS with energy storage system will deal with building isolated network, forming and operating island, and connecting island and re-synchronization with upstream network or grid system. A model based on the black-start principle proposed above is developed and the model is applied in a regional power grid.