Grid Support with Wind Turbines: The Case of the 2019 Blackout in Flensburg

The work presented in this paper aims to show how modern wind turbines can help control the frequency a small grid which suffers from large power imbalances. It is shown for an exemplary situation, occurred Flensburg’s distribution 2019: major blackout, after almost two hours islanding operation, affecting entire grid, supplies approximately 55,000 households and businesses. For analysis, turbine model support controller developed at Wind Energy Technology Institute are combined with real measurements day of blackout generate fictional yet realistic case study such situation. study, it assumed that functionalities connected medium voltage city. what extent operate by providing ways: By supplying synthetic inertia only, where limit rate change islanded directly losing connection central European grid. In combination primary capabilities (WTs), disconnection one gen set local station might have been avoided. Furthermore, could restored 50 Hz shortly situation even if aforementioned gen-set was lost. This would allowed connecting backup line thereby avoiding blackout.