To meet the goals of the Paris Agreement, the Netherlands is integrating large amounts of offshore wind energy into the power system and has ambitious plans for the coming years. A grid topology with transmission capacity above 1 GW connecting offshore wind farms (OWFs) at distances close to 100 km in a standardized, modular, and cost-efficient manner is the focus of this paper. An electromagnetic transient (EMT) model was built in PSCAD in which OWFs are connected with 66-kV cables to a centralized offshore platform and a transmission link with a capacity of 1050 MW. The 66-kV cables will be coupled to three converter transformers connected to each other on the valve side and not on the 66-kV side. The link to the onshore transmission network uses VSC-HVDC technology with MMC topology. A dynamic performance analysis was done to obtain a complete overview and understanding of the overall behavior.

Large amounts of offshore wind energy are planned by the Dutch government for the next years. The power system will continue to evolve to integrate these new sources of green power efficiently. The dynamic system performance of a grid topology with transmission capacity above 1 GW connecting offshore wind farms (OWFs) at distances close to 100 km in a standardized and modular manner is the focus of this paper. An electromagnetic transient (EMT) model was built in PSCAD in which OWFs are connected with 66 kV cables to a centralized offshore platform and a transmission link with a capacity of 1050 MW. The connection to the onshore transmission network is through a high voltage direct current (HVDC) link that uses a modular multilevel converter (MMC) topology. A dynamic performance analysis with several expected operational cases is done to obtain a complete overview and understanding of the system.