Transmission Investment for Renewable Generation (TIRG) is a mechanism designed to fund electricity transmission projects that are specific to connecting renewable generation. To minimise delays, funding of the TIRG projects operates outside of the main price control process.
We put the TIRG mechanism in place in 2004 to provide the three transmission licensees with revenue allowances to connect renewable generation that was not forecast at the time the relevant transmission price controls were set. It includes expenditure allowances for specific reinforcement projects for each of the transmission licensees.
TIRG comprises four projects:
- Beauly Denny, a project jointly delivered by Scottish Hydro Electric Transmission Plc (SHE Transmission) and SP Transmission Limited (SPT);
- Sloy, a joint project between SHE Transmission and SPT;
- South West Scotland, a project delivered by SPT; and
- the Anglo Scottish Interconnector, a joint project between SPT and National Grid Electricity Transmission.