Our Transmission network consists of overhead lines, underground cables and substations. It operates at 400,000, 275,000 and 132,000 volts. Directly connected to our network are 45 power stations, 12 Distribution networks,which connect to people’s homes and businesses and a few large industrial customers. The transmission system is also connected to three interconnectors to other countries.
We are regulated by Ofgem through a framework known as RIIO, and under this framework we charge our customers for using our network. The current regulatory period is known as RIIO-T1 and runs from 2013 to 2021. RIIO 2 is likely to run from 2021 to 2026.
We don’t generate electricity or own or operate UK Electricity Distribution networks, and we don’t sell electricity to household consumers in the UK.
The Electricity Transmission business in National Grid will soon be separate from the Electricity System Operator business.
We want to make sure that the needs of our stakeholders are the key input into our future plans.