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. We therefore intend to focus further optioneering on those substations in the immediate vicinity of the Crossaig substation (at differing voltage levels) to ensure we select the most economic and effective option as our preferred option.