Therefore, seven potential connection points at existing sub-400 kV stations were evaluated in this area: Cleve Hill, Coryton, Grain, Kemsley, Kingsnorth, Northfleet East and Rayleigh Main. Further assessments identified Kingsnorth sub-station as the preferred connection point to the network, where there would be no constraints on the import/export of electricity by GridLink. Subsequently, a grid connection agreement concerning a connection to the Kingsnorth sub-station was signed in October 2016 by NGET and GridLink.
GridLink is responsible for the connection works under the grid connection agreement. The connection to Kingsnorth sub-station will be achieved by the installation of a 1.5 km single-circuit or double-circuit, 400 kV alternating current underground cable from the GridLink converter station to the Kingsnorth sub-station. At the sub-station, new equipment will be installed in an existing spare bay. No extension to the sub-station is required. The underground cable route is located wholly within the former E.on coal-fired power station site, where the cables will be placed primarily under site roads or in a designated services corridor.
The grid connection does not require the construction of any new overhead transmission lines.