To reach the ambitious goals related to the decarbonization of the power generation it is inevitable to use the full potential of renewable energy sources, which includes also the massive deployment of oﬀshore wind energy. Furthermore, there exists the possibility connecting hydrogen production equipment to the oﬀshore platforms building so called oﬀshore energy hubs. However, several challenges related to dynamic stability need to be solved for the proper large scale integration of this oﬀshore energy hubs. One of the stability issues is related to sub-/supersynchronous oscillations and to assess this phenomena, suitable EMT models are required. The multi-GW oﬀshore energy system model to be discussed in this presentation, will illustrate an example with 2GW size, including wind turbines aggregated in diﬀerent smaller portions of powers, diﬀerent sizes of electrolysers and a bipolar HVDC link to connect the oﬀshore hub to the power system on the main land. The dynamic stability of sub-/supersynchronous oscillations depends on many factors such as for example the parameters of the control loops, the operating conditions, length of the transmission cables and thus it is important to explore diﬀerent conditions and topologies to get a holistic understanding of the capabilities and limits of the model. In addition, the individual size of the aggregated electrolysers and wind turbines might aﬀect the properties
of sub-/supersynchronous oscillations and thus need to be taken into account.
Sandro Kellermüller | TU Delft