Research on black-start technology of wind-storage integrated system considering suppression of excitation inrush current
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.
wind power generationintegrated wind storage systemsoft-startblack start
国家科技期刊平台
NSTL
万方数据
