Pump Storage Sector

Between 2007 and 2015, the total installed capacity of renewables electricity in Scotland has more than doubled.  Due to its intermittent nature, the rise in renewable generation has resulted in increased demand for flexible capacity to help meet energy balancing requirements for the national grid system.

Pumped storage hydro is considered by the Directors to be the most developed and largest capacity form of grid energy storage that currently exists.  This can help reduce renewable energy curtailment and therefore promote grid stability.





It is widely acknowledged that greater flexibility is required in the electricity system of Great Britain (GB) to decarbonise at acceptable cost to consumers. PSH is one of the best proven technologies available at scale to provide the required flexibility.

In its Smart Power report, the National Infrastructure Commission estimated that greater flexibility could save consumers up to £8bn annually by 2030.

In their report titled "Pumped Storage – Position Paper", Scottish Renewables state that:

"New Pumped Storage can help to facilitate the move to this low-carbon future, ensuring that renewable energy can be stored when generated and used when required. This enables efficient management of a more diversified mix of energy generation, smoothing differences between demand and supply and enabling savings to be made on transmission upgrades and balancing services.

In addition, PSH facilities can help contribute to energy security, guarding against black outs from unplanned shutdowns of large power stations by reacting quickly and effectively to gaps in demand."

The Scottish Government released their Scottish Energy Strategy report in January 2017 which sets out the Government's vision up to 2050. This document outlines their strategy for energy use within the different sectors and expressly references ILI Group together with Scottish Power and Scottish & Southern Electricity in the context of pumped storage hydro:

“In Scotland, Scottish Power is proposing an expansion of its existing Cruachan plant, whilst SSE is proposing their 600MW project at Coire Glas and conversion of its existing Sloy Hydro Power station to PSH, both of which have been consented by the Scottish Government. 2020 Renewables with Buccleuch are developing plans for a 400MW PSH at Glenmuckloch surface coal mine was recently consented by the Scottish Government and the ILI Group are proposing three 400MW PSH stations in Scotland.”


Click here to see the Scottish Energy Strategy





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