A likely 33kV inter-array cabling system will collect the power generated by the wind turbines and will transmit it into the offshore substation, where the voltage will be stepped-up from low to high voltage (HV). A single or multiple 3-core HV cables will start from the substation up to the onshore grid. The voltage for the export transmission assets will be chosen between 132 and 275kV depending on the available technology and after an optimisation analysis of losses, costs and reliability.
The export submarine cable(s) from the offshore substation is anticipated to have its landfall north of Tunstall. From there underground cables will reach the onshore grid entry point, currently chosen at a new 275/132 kV transformer station called New Hedon. The new transformer station will be positioned close to the existing transformer station Saltend North. Two options for the onshore cable route are currently assessed and the final decision will also depend on the agreement reached with land owners.
