The network reinforcement that East Anglia GREEN will provide would be achieved by the construction and operation of a new 400 kV electricity transmission line over a distance of approximately 180km and a new 400 kV connection substation.
The reinforcement would comprise mostly overhead line (including pylons and conductors – the ‘line’ part) and underground cabling through the Dedham Vale Area of Outstanding Natural Beauty (AONB) and a new 400 kV connection substation in the Tendring district.
The new substation site would be fenced and would contain high voltage electrical equipment, such as transformers, circuit breakers and shunt reactors, support structures, control buildings, a permanent access road and parking areas.
Works would be required at the existing 400 kV substations at Norwich, Bramford and Tilbury. Cable sealing end (CSE) compounds would be required to connect sections of underground cable with the overhead lines. Each CSE compound would be fenced, and contain electrical equipment, support structures, a small control building and a permanent access track.