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New Pumped Storage Proposals
New Pumped Storage Proposals Neil Lannen (Hydro Development Manager) SSE - NEW PUMPED STORAGE PROPOSALS • WHY MORE PUMPED STORAGE • EXISTING PUMPED STORAGE SCHEMES • SCHEME ECONOMICS • PUMPED STORAGE STUDIES • SSE PROJECTS BEING TAKEN FORWARD WHY DO WE NEED NEW PUMPED STORAGE ? • • • • • • • Balancing thermal power Balancing variable/ intermittent power sources (Renewables) Provide grid stabilisation Provide peaking power to grid Take power off the grid during over periods of over supply Ability to store large quantities of energy Proven method of mass electricity storage SSE view is that as the amount of renewables increases the case for additional Pumped Storage becomes stronger. EXISTING PUMPED STORAGE IN UK There are currently 4 schemes in the mainland UK SCHEME LOCATION OWNER INSTALLED CAPACITY (MW) DINORWIG WALES FIRST HYDRO 1728 FESTINIOG WALES FIRST HYDRO 360 FOYERS SCOTLAND SSE 300 CRUACHAN SCOTLAND IBERDROLA (SP) 440 ECONOMICS OF NEW PUMPED STORAGE SCHEMES • • • • • • • • Economics for new Pumped Storage are very complex Very large capital investments Primarily based on difference in off peak and peak energy prices Ancillary services markets are increasing Key is in being as flexible as possible Benefit in having multiple units Transmission use of system charge is very high (MW based) Business rates for hydro are increasing PUMPED STORAGE STUDIES • SSE commissioned a study in 2006 to review sites • 7 potential sites were assessed and ranked ASSESSMENT CRITERIA • • • • • Technical (Head & Energy Storage Potential) Capital Cost Environmental Sensitivity (Designations etc) Proximity to the Grid Site Access and Land Ownership PUMPED STORAGE PROPOSALS CONVERSION OF EXISTING HYDRO TO PUMPED STORAGE • Sloy, 60 MW Pumping Capacity to existing station NEW PUMPED STORAGE SCHEMES (Scotland) • Coire Glas, 300 to 600 MW Pumped Storage Scheme • Balmacaan, 300 to 600 MW Pumped Storage Scheme SLOY – COVERSION TO PUMPED STORAGE SLOY HYDRO SCHEME Sloy Power Station – Loch Lomond SLOY HYDRO SCHEME • • • • • • • • • • • Consented by Parliament 1945 Construction Completed 1950 Considered for Pumped Storage as far back as 1935 Station is now Grade A Listed ( as is all infrastructure) Largest Conventional Hydro Station in UK Installed Capacity of 152.5 MW 4 Vertical Francis turbines Gross Head of 280 m Generates around 130 Million Units per Annum Used primarily as a peaking station to the Grid Load factor of around 10 % SLOY – HISTORICAL PHOTOS Sloy Power Station Excavation 1947 SLOY DURING CONSTRUCTION Aerial view of Power Station and High Pressure Steel Penstocks 1950 SLOY – HISTORICAL PHOTOS Completed Power Station Building 1950 SLOY PUMPING STATION PROJECT • • • • • • Planning Application made Sept 09 Installation of 60 MW of Pumping Capacity 2 x 30 MW Pumps Flow rate 10 cumecs per pump to Loch Sloy Average of 6 hrs pumping per day Double station load factor to around 20 % SLOY – PUMPING STATION PROPOSAL Sloy Pumping Station – Layout Plan SLOY – PUMPING STATION PROPOSAL Sloy Pumping Station – Typical Cross Section SLOY – PUMPING STATION PROPOSAL Sloy Pumping Station – Architects Impression of New Surface Buildings SLOY – PUMPING STATION PROPOSAL Current Works and Programme • • • • • Project going through approval process with National Park Planning Section 36 Planning Consent Summer 2010 Detailed site investigation completed and station design underway Propose Start Construction May 2011 Estimated 28 Month construction programme NEW PUMPED STORAGE PROPOSALS Coire Glas & Balmacaan Pump Storage Schemes NEW PUMPED STORAGE SCHEMES Planning Process and Initial Consultations • • • • • • Initial consultations held in Summer 2009 with Consultees Scottish Government, SEPA, SNH and Highland Council Request for Scoping made to Scottish Government Sept 09 Scoping Responses received Nov 09 setting out scope of Environmental Studies Full Environmental Impact Assessment is required Projects will require Planning Permission under Section 36 of the Electricity Act COIRE GLAS – PUMPED STORAGE SCHEME 300 to 600 MW Pumped Storage Scheme COIRE GLAS PUMPED STORAGE SCHEME Coire Glas – Schematic Layout Plan COIRE GLAS – PUMPED STORAGE SCHEME • • • • • • Lower Tailpond is Loch Lochy (controlled by Mucomir weir) Upper Headpond in Coire Glas (New large dam) Underground system of water tunnels Underground cavern power station and access tunnels Approximately 500 m elevation difference (Head) Ability to store of up to 30 GWh of energy COIRE GLAS PUMPED STORAGE SCHEME Coire Glas – View back over Loch Lochy COIRE GLAS PUMPED STORAGE SCHEME Coire Glas – Potential Dam Site COIRE GLAS PUMPED STORAGE SCHEME Coire Glas – Approximate Tailrace Location in Forestry BALMACAAN – PUMPED STORAGE SCHEME 300 to 600 MW Pumped Storage Scheme BALMACAAN PUMPED STORAGE SCHEME Balmacaan – Schematic Layout Plan BALMACAAN – PUMPED STORAGE SCHEME • • • • • • Lower Tailpond is Loch Ness (level controlled at Dochfour Weir) Upper Headpond by raising existing Lochan (New dam or dams) Underground system of water tunnels Underground cavern power station and access tunnels Approximately 500 m elevation difference (Head) Ability to store up to 30 GWh of energy BALMACAAN PUMPED STORAGE SCHEME Balmacaan – Existing Natural Lochan BALMACAAN PUMPED STORAGE SCHEME Balmacaan – View back over Loch Ness (Foyers on opposite bank) PUMPED STORAGE SCHEMES Current Works and Programme • • • • • • Meeting Statutory Consultees & Stakeholders Meeting MP’s, MSP’s, Local Councillors, Community Councils etc Environmental Impact Assessment Contract awarded Tendering Design Feasibility Consultancy Contract Planning Application Early 2012 for both schemes Earliest completion date 2017/2018 BALMACAAN PUMPED STORAGE – 3D LAYOUT HYDRO PUMPED STORAGE – THANK YOU ! Balmacaan – View back over Loch Ness (Foyers on opposite bank)
