Integrated wind storage system

namely the wind power generation equipped with energy storage

has a black-start capability

which can be controlled to use the system as a black-start power source. On this basis

a black start program for the integrated wind storage system is developed based on a single wind turbine. Firstly

the energy storage device is started through grid-forming control

and to avoid the self-excitation generated by excitation inrush or resonance in the process of transformer input

the inertia link is added based on the original voltage-loop control to realize soft-start strategy. Then

the energy storage system establishes the AC frequency and voltage to realize restoration of the wind turbine generators and the loads. After the wind-storage integrated system is stably started

the electrical energy is transmitted to the 35 kV busbar through the main transformer and transmission line

to complete the black start process. Finally

a simulation model of the integrated wind-storage system is built on the PSCAD/EMTDC platform to validate the black-start scheme using the soft-start strategy

which keeps the voltage stable and the power balanced

and completes the start-up of the system

and at the same time suppresses the excitation inrush current effectively.