Within RIIO-T2, we know that there are many factors that could impact how we invest in and operate the north of Scotland transmission system. While we can identify the factors, we cannot always predict the timing or the precise details at the start of the price control period. Uncertainty mechanisms are a means to manage the risk associated with events outside our control. These mechanisms protect us from being forced to make decisions at the wrong time and so over or under forecasting our investment needs. Importantly, these mechanisms protect consumers by only allowing us to invest when the need is certain.
The Medium Sized Investment Projects (MSIP) re-opener provides us with an annual opportunity to request funding for sub-£100m projects which has not been provided in RIIO baseline allowances. This allows us to undertake necessary investments in the transmission network, many of which may be critical for achieving net zero, only when there is clear evidence of benefit and we have clarity on likely costs.
Medium Sized Investment Projects (MSIP)
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Skye Dynamic Line Rating (DLR)
This application presents the needs case to develop and install a Dynamic Line Rating (DLR) system on the existing Broadford to Edinbane section of the 132kV Overhead Line (OHL) circuit from between Fort Augustus and Ardmore on Skye.
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Gremista (Shetland) Grid Supply Point (GSP)
This MSIP application presents the needs case for the creation of a new Grid Supply Point (GSP) Substation at Gremista on Shetland and associated 132kV network infrastructure connecting Gremista GSP to Kergord substation
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North of Beauly Dynamic Line Rating (DLR)
This MSIP application presents the needs case to develop and install a Dynamic Line Rating (DLR) system on the existing 275kV Overhead Line (OHL) circuits from Beauly – Loch Buidhe and Loch Buidhe – Dounreay.
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Network Stability Solution
This MSIP application presents the needs case for the installation of synchronous compensation plant at keys nodes in the north of Scotland.
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LT466 South West Harmonic Filter
Based on system testing, we know that installation of a harmonic filter would have an immediate impact on the fifth order harmonics observed at Crossaig substation. -
Corriemollie Transformer Protection Modification & Corriemollie T20
This MSIP application relates to the works required to connect Lochluichart Extension II windfarm. -
NOA Constraint Management Pathfinder (CMP) B6
The B6 Constraint Management Pathfinder project connects generators to the Anglo-Scottish Commercial Intertrip scheme. This enables the National Electricity System Operator (NESO) to operate the system at a higher capability, thus maximising the use of existing assets and reducing potential curtailment on renewable generation. -
Tealing PST Bypass
The Tealing PST Bypass Project aims to modify the existing Phase-Shifting Transformer (PST) infrastructure at Tealing to enhance network flexibility and reliability. The project will help manage constraints and optimise power flows across the network.