North West Coast Connections Project PINS Briefing 12 August 2015 Robert Powell, Judith Vokes, Richard Gwilliam
The North West Coast Connections Project Moorside 2
What do we need to build? An electrical connection for Moorside needs four transmission circuits – two double circuits Double circuit 1 Double circuit 2 3
Technologies How Do We Do It?
Technologies for Connection 400kV AC Overhead Line 400kV 400kV 132kV Conventional 132kV Trident Conventional Low height lattice 400kV T Pylon lattice wood pole lattice 6,900 MW 6,900 MW 300-400 MW 120-150 MW 6,900 MW Height typically Height typically 38- Height typically Height typically Height typically 46-50m 41m 35-38m 27.5m 13m
Technologies for Connection 400kV AC Overhead Line 400kV Conventional lattice
Technologies for Connection 400kV AC Overhead Line 400kV Low height lattice 7
Technologies for Connection 400kV AC Overhead Line 400kV T Pylon 8
Technologies for Connection 400kV AC Overhead Line 132kV Conventional lattice 9
Minimising the impact Sensitive routeing of overhead lines Screening and landscaping Rationalisation of existing lines Alternative pylon designs Placing new line underground 10
Technologies for Connection Underground 400kV AC Cable This site width 40m 5000A circuit site width 70m 11
Technologies for Connection Tunnelling Head house Tunnel is about 25- Longer tunnels require diameter 30 metres below ventilation points and emergency approx 16 ground access along route metres & 7 metres high 12
Technologies for Connection Tunnelling 13
Technologies for Connection High Voltage Direct Current (HVDC) • An alternative solution to AC for bulk transmission of electricity • NG would expect this to be undersea / underground • Much narrower cable route than AC • The type of HVDC needed does not exist today at required power levels • Technology has not yet been used to connect a nuclear power station 14
Technology: the options Overhead line Cable (direct burial Cable (gas insulated Cable (tunnel) HVDC XLPE) (GIL)) typical £2.5m to £3.0m £13m to £32m per Similar to Cable Cost of tunnel + £2m per km plus up £ per km km cable to £332m per pair of convertor stations PROS Limited Improved visual No reactors or above Use in highly Advantages over AC disturbance; quick amenity ground installations; constrained areas transmission over long build; operational narrower working distance (e.g. flexibility together width. interconnectors) with rapid repair and restoration times Lack of flexibility – CONS Visual impact Lengthy construction New technology, use Difficult to and disturbance; of SF6 alter/expand difficult to transform fault detection and voltage; large repair; above ground converter stations infrastructure; above required ground reactive compensation
Development Programme
Regional Stakeholder Engagement Started in 2005 with drive to see new nuclear development in Cumbria National Grid involved since 2009 30 local planning authorities Range of environmental, business and community organisations including; Natural England, English Heritage, the Marine Management Organisation, Morecambe Bay Partnership, CALC, LALC 17
Project Timeline 2009 -2011 2012 2013 - 2014 • Initial work and • Technical consultation • Identified route studies looking at the on six broad connection corridors in which a new ways to connect options connection could be Moorside built. • 23 Oct 2012 • 12 week outline announced decision to take two strategic routeing consultation. options forward for • Landowners contacted. further study • EIA wildlife studies started. 18
Project Timeline 2009 -2011 2016 2013 - 2014 2015 2017 • Review 2014 • Formal public • DCO submission to the consultation on Planning Inspectorate consultation feedback route alignment • Announce proposed and construction technologies route corridor being progressed • Complete EIA • Ongoing studies to determine detailed route of new connection and how it will be built • Continue working with stakeholders to shape proposals o detailed route o construction 19 o Mitigation o further EIA surveys
Project Timeline 2009 -2011 2012 2013 - 2014 2015 2018 2016 2019 2017 2024 • Decision on • Complete connection • Subject to consent application made by the to meet Moorside first being granted Secretary of State for generation in 2024. start construction new Energy and Climate connection Change 20
Strategic Options Consultation 11 May 2012 -19 July 2012
Strategic Options Consultation
Strategic Options Consultation
Outline Routeing Public Consultation 4 Sept – 28 Nov 2014
Publicising the Consultation 25
Publicising the Consultation 26
Consultation Responses 27
What you told us – most common themes The Lake District National Park Rationalisation (removal of existing ENW 132kV towers) Designing a route to minimise landscape impacts Minimising disruption to and impacts on communities The possibility of an offshore option 28
What you told us - Onshore North Preferences mostly for the green route Tends to be seen as sensible, as long as it results in an existing line coming down Some specific areas of concern 29
What you told us - Onshore South Wide opposition to Onshore South People said running a line through the South Lakes would be unacceptable The main reason for supporting this route was cost 30
What you told us - Offshore South People generally supported this option on landscape grounds But many noted that it was technically challenging Greatest problem is connecting HVDC NuGen said this would not work for the nuclear power station 31
What you told us - Onshore South with Tunnel Qualified support from many members of the public Broad support from stakeholders People said that if an offshore connection wasn’t possible, then they liked the idea of a tunnel 32
Consultation Feedback Rationalisation of existing overhead lines is important both north and south of Moorside Future development south of Whitehaven Feedback reaffirmed visually sensitive areas, particularly: o Lake District National Park o Ravenglass o Duddon estuary 33
Consultation Feedback All feedback redacted and published on our website for 2012 and 2014 consultations Propose to repeat this for formal consultation in 2016 34
Next Steps We will work with: Local Authorities Landowners Parish Councils Community Agricultural shows Information events Special interest groups 35
Next Steps Which pylons we are going to use and where to put them? 132kV lines to take down? New substations? Temporary 132kV lines 415V, 11kV and 33kV crossings Is there a need for more mitigation? What landscaping should we do? EIA Scoping SOCC 36
Development Programme 2016 Public Consultation on Detailed Proposal 2017 Submit DCO Application 2019 Start build? 2024 Ready for power station 37
Issues and Opportunities GIS 4Projects 38
Any Questions?
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