Electricity Ten Year Statement
November 2018
1 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
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2 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
Contents
02 Foreword 91 04 Key messages Chapter 4 The Way Forward 05 92 4.1 Shaping our network planning through Chaper 1 the ESO Forward Plan and Network Development Roadmap Introduction 93 4.2 Legal separation of the ESO and ETYS 94 4.3 Stakeholder feedback 07 1.1 ETYS and the ESO publications 08 1.2 ETYS-NOA and TYNDP 09 1.3 ETYS and the Network Development 95 Roadmap 10 1.4 Improving your experience Chapter 5 Further Information 11 96 Appendices overview Chapter 2 98 Meet the ETYS team Network Development Inputs 100 Glossary 13 2.1 Future Energy Scenarios (FES) 15 2.2 Networks
17 Chapter 3 The Electricity Transmission Network 18 3.1 Introduction 19 3.2 NETS background 20 3.3 NETS boundaries 25 3.4 Network capability and requirements by region – Scottish boundaries 44 3.5 Network capability and requirements by region – The North of England boundaries 53 3.6 Network capability and requirements by region – Wales and the Midlands boundaries 62 3.7 Network capability and requirements by region – The East of England boundaries 67 3.8 Network capability and requirements by region – The South of England boundaries 82 3.9 Probabilistic thermal analysis case study 86 3.10 Regional voltage analysis case study
01 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
Foreword
Welcome to our Electricity Ten Year Statement. This statement puts forward our latest view of the future requirements of GB’s electricity transmission system. It also highlights the areas that show future uncertain flows and requirements. Such areas provide opportunities for system development and innovative management solutions.
Our Electricity Ten Year Statement (ETYS), The themes in this year’s FES are continued along with our other System Operator (SO) closure of fossil-fuelled generation, an influx of publications, aims to encourage and inform wind generation, rising electric vehicle and heat debate, leading to changes that ensure a pump demand, and increasing import and export secure, sustainable and affordable energy via interconnectors. These changes are leading future. It is also a key input into the Network to high north-to-south transmission flows across Options Assessment (NOA) process that makes Scotland and much of the north of England to meet recommendations as to which investments demand in the Midlands and the South. The number and solutions should be taken forward. It is of interconnectors that are predicted to connect important to note that the ETYS and the NOA towards the south east of England also create only focus on the key major transmission stresses on the existing network and is a key focus boundaries across GB and that there will area to ensure that we can meet the needs of the be many other system requirements and interconnector connections. transmission investments required that are not currently considered in these documents. One of the most important transmission developments this year has been the commissioning Thank you for your continued feedback as to what of the Western HVDC project to link south-west and how you would like to see the ETYS process Scotland to north Wales. This adds a significant develop, it is really important that we are sharing the increase to the capability (circa 2 GW) across the right data in the right way that makes this a useful northern part of the network to help manage the document for your needs. You will see some changes high flows of mainly wind generation. in this document which are as a result of the direct feedback from you. From the results of the work in this document the Transmission Owners (TO) have provided asset As we all know, the electricity industry is changing solutions to meet the required capability needs. at an unprecedented pace and scale as we move These asset options, alongside reduced or no- to a more decarbonised and decentralised nation. build options will be assessed through our Network This is demonstrated through our 2018 Future Options Assessment (NOA). The NOA aims to make Energy Scenarios (FES), which we’ve developed sure that the transmission system is continuously with stakeholder and industry input, and it is these developed in a timely, economic and efficient scenarios that are at the heart of the ETYS process way, providing value for our customers. The NOA in determining the future transmission network needs. 2017/18, using the assessment results from ETYS 2017, recommended £21.6 million of development spend on future network reinforcements in 2018 to provide the required transmission capabilities.
02 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
As the Electricity System Operator (ESO), we are always looking to find ways to reduce the costs to the consumer whilst meeting the needs of the transmission network. This year, following the commitments made in the ESO Forward Plan and the Network Development Roadmap consultation, we are looking to encourage and assess a broader range of solutions to meet transmission needs. This range of solutions ranges from smart grid management systems to Distribution Network Operator (DNO) assets that provide transmission support and market solutions. This will help improve our investment recommendations for the benefit of customers and consumers. In this document, we present case studies that demonstrate how we are taking steps towards enhanced tools and analysis to improve our network planning. You can find further details about our enhanced role in network planning in the ESO Forward Plan. You can also find further details about the changes we are making to our methods in the Network Development Roadmap.
I hope that you find this document, along with our other SO publications, useful as a catalyst for wider debate.
Please share your views with us; you can find details of how to contact us on our website https://www.nationalgrideso.com/insights/ electricity-ten-year-statement-etys/.
Julian Leslie Head of Networks, ESO
03 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
Key messages
We have assessed the capability of the National Electricity Transmission System (NETS) against the requirements derived from the Future Energy Scenarios (FES), using boundary analysis techniques.
Below is a summary of the main findings, 3. The NETS will see growing impact from new together with how these findings will be technologies such as electric vehicles, battery used in the NOA and the future development storage and heat pumps. As a result, the of the ETYS. requirements of NETS are becoming increasingly complex. System requirements are more frequently 1. The NETS will face network capacity deficits in a number of regions due to the following factors: being driven by conditions other than winter – Increasing quantities of wind generation peak demand. We are taking this evolution in connected across the Scottish networks is likely requirements into account and are developing to double north-to-south transfer requirements analysis tools and processes to assess this future within ten years. For example, the flow through transition. We publish in this year’s document the the Scotland–England boundary is expected to description and the preliminary results of two case studies addressing voltage and thermal year round reach 15.7 GW in FES Two Degrees scenario by 2028, almost three times the current 5.7 GW requirements. We will publish full separate reports boundary capability with the Western HVDC about the voltage and thermal year round case reinforcement operational. studies by March 2019. – A potential growth of more than 6 GW in low carbon generation and interconnectors in the 4. In April 2019, the ESO will become legally north of England, combined with increased separate from the rest of National Grid. This Scottish generation, will increase transfer will shape the future development of the ETYS requirements into the English Midlands. and NOA publications, as we work to facilitate – Potentially high growth in the next decade of competition and improve our reinforcement up to 9 GW in generation coming from offshore recommendations for the benefit of our wind on the east coast connecting to East customers and consumers. Furthermore, Anglia risks stressing this region of the network. the ESO is promoting more whole system – New interconnectors with Europe will place thinking to facilitate network and market access. increased stress on the transmission network, especially southern and eastern regions of the network.
2. The NOA process will evaluate options for NETS development and condense them to a set of ESO preferred options and investment recommendations. These results will be shown in the NOA 2018/19 report to be published in January 2019. – For NOA 2018/19, we expect to assess around a hundred NETS reinforcement options and, at the time of writing, eight have been initiated by the ESO. Following our cost-benefit analysis (CBA), we will recommend the options requiring expenditure in 2019, as well as those worth delaying.
04 National Grid ESO | November 2018 Electricity Ten Year Statement 2018 Chapter 1 Introduction
1.1 ETYS and the ESO publications 07 1.2 ETYS-NOA and TYNDP 08 1.3 ETYS and the Network Development Roadmap 09 1.4 Improving your experience 10
05 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
The Electricity Ten Year Statement (ETYS) presents the National Grid Electricity System Operator’s (ESO) view of future transmission requirements and the capability of Great Britain’s (GB) National Electricity Transmission System (NETS). This is a significant part of our annual network planning process. Through it, we identify requirements that may lead to network development, which are then assessed through the Network Options Assessment (NOA)1 process. This is our seventh ETYS, which we produce in our Since the first ETYS, published in 2012, and role as the ESO, with help from the TOs in Scotland the Seven Year Statement that preceded it, our (Scottish Hydro Electric Transmission and SP publications have continuously evolved. As a Transmission) and in England and Wales (National result, some of the information you used to find Grid Electricity Transmission). in ETYS is now published in separate, more focused documents, which we describe below. Our aim is to build on the Future Energy Scenarios (FES)2 and provide you an overview of the NETS, We welcome your feedback, which helps us to its power transfer capability and its potential future improve our publications. We are interested in capability requirements. knowing how you use ETYS and how we can make it more useful for you. You can find details of how to contact us at the end of this document.
1 https://www.nationalgrideso.com/insights/network-options-assessment-noa 2 http://fes.nationalgrid.com/ 06 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
1.1 ETYS and the ESO publications
Part of the ESO’s role is to assess and make The System Operability Framework3 (SOF) takes appropriate recommendations about reinforcing a holistic view of the changing energy landscape the NETS to meet our customers’ requirements to assess the future operation of Britain’s electricity in an economic and efficient way. networks. It combines the change in generation and demand from the FES with network capability We do this in three stages. The first stage establishes from ETYS to assess future system requirements. the Future Energy Scenarios (FES), described further The assessments in the SOF and the ETYS in the next chapter. The second stage is determining complement each other to ensure the future NETS the NETS’s requirements, which we describe in is both operable and can transmit power from ETYS. And finally, we evaluate network development suppliers to consumers. While the SOF focuses options, and publish investment recommendations on the operability challenges of the NETS, the in the NOA report. ETYS evaluates its capability to transmit power. We recently moved from one annual SOF publication The ETYS complements the NOA report, because to reports on a range of topics. Figure 1.1 shows information about NETS capability and future the connection between ETYS and the relevant requirements it contains feed into the analysis used ESO documents. to produce the NOA report. By updating the future requirements based on the updated scenarios, the NOA recommendation can also change. Based on last year’s ETYS, the NOA 2017/18 recommended investing £21.6m this year to potentially deliver 22 projects worth almost £3.2bn.
Figure 1.1 ETYS and ESO documents
System Operability Framework Regular How the changing energy landscape will impact the operability of the electricity system.
Future Energy Electricity Ten Network Options Scenarios Year Statement Assessment July November January A range of The future The recommended plausible and transmission options to meet credible pathways requirements reinforcement for the future of on the electricity requirements energy from today system. on the electricity out to 2050. system.
3 https://www.nationalgrideso.com/insights/system-operability-framework-sof 07 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
1.2 ETYS-NOA and TYNDP
The ETYS and NOA also consider arrangements Although TYNDP, ETYS and NOA all highlight for developing cross-border electricity transmission future network developments, there are important networks (including interconnections with differences: mainland Europe). • The TYNDP is produced every two years, whereas the ETYS and NOA are produced So, we need to consider the relationship between annually. So information included in the TYNDP the ETYS-NOA and European transmission usually lags the ETYS and NOA. developments described in the Ten Year Network • A different set of energy visions are used for the Development Plan (TYNDP). The TYNDP is TYNDP compared to the FES we use for ETYS produced by the European Network of Transmission and NOA. System Operators for Electricity (ENTSO-E). It is • The TYNDP focuses mainly on pan-European similar to the ETYS and NOA but covers all the projects that satisfy European Union objectives, European Transmission System Operators (TSOs). such as facilitation of cross-border trade and It is published every two years with input from European environmental targets. TSOs in accordance with Regulation (EC) 714/2009. • Analysis for the TYNDP is conducted by The next publication is due in December 2018. European regional groups. GB participates in the North Sea group.
You can find more information about the TYNDP at http://tyndp.entsoe.eu/
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1.3 ETYS and the Network Development Roadmap
We published our Network Development Roadmap These pathfinding projects should help improve in July, following consultation in May4. The roadmap the value the ETYS and NOA drive for consumers sets out ambitious commitments to develop our by providing more informative data and therefore network planning tools and deliver greater value helping ensure the right balance between for consumers. Some of these changes inform operational and network investment solutions. the development of the ETYS, others will be We will publish full reports on the pathfinding incorporated in the NOA process. projects before ETYS 2019.
The changing nature of the electricity system The roadmap also highlights that our analysis means it is increasingly important we study the is considering more complex conditions at the transmission network needs across more of the same time as expanding the NOA process to allow year than our current primary focus of winter peak. network and non-network solution providers across distribution and transmission to submit options to We are applying a NOA-type approach to regional meet transmission network needs. We therefore voltage challenges which are becoming more costly are taking steps to communicate our analysis and to manage. We are carrying out practical pathfinding transmission network needs as clearly as possible projects in three regions of the country, to develop to the new audience. We have taken initial steps the tools and processes we need to include in this document but would welcome feedback in next year’s ETYS and NOA. We include the on how else we could make this document and preliminary results of a case study of voltage the way we set out transmission network needs year-round assessment in a high-priority region. more accessible.
The level of uncertainty in the conditions of a year of operation has increased because of high penetration of intermittent renewable resources and interconnectors. We are carrying out a case study to explore the use of probabilistic techniques to one region of the GB network, and we include preliminary results.
4 https://www.nationalgrideso.com/insights/network-options-assessment-noa 09 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
1.4 Improving your experience
We hope you will benefit from the 2018 ETYS and We have investigated extending our winter peak our other ESO publications, the NOA, FES and SOF. demand analysis with year-round voltage and thermal analysis and have added two case studies We are keen to hear your views as we continue in Chapter 3. We have also improved the way developing the ETYS. This year, we received we present the future required transfer graphs to feedback through consultation survey, face-to-face represent each scenario in a separate graph and at our electricity customer seminars, as well as from include the range of expected boundary flows correspondence sent to our ETYS email address. based on market data.
Based on your feedback, we have increased We have created a new appendix, Appendix the size of the maps in Chapter 3, adding more H, to explain further some of the inputs and information in the graphs where possible. We have methodologies we use in the analysis. In this also explained more about the naming convention appendix, you can find descriptions of the for some of the boundaries. FES inputs and further details about the thermal case study.
10 National Grid ESO | November 2018 Electricity Ten Year Statement 2018 Chapter 2 Network Development Inputs
2.1 Future Energy Scenarios (FES) 13 2.2 Networks 15
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To identify the future transmission requirements of the NETS we must first understand what power demand and generation the network may need to handle. We do this by using the FES. We engage with our customers and stakeholders in a variety of ways, including workshops, webinars and meetings. The feedback we receive through our engagement is fundamental to the development of the FES scenarios. The scenarios help to inform our network planning.
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2.1 Future Energy Scenarios (FES)
Following extensive analysis and consultation, we The level of decentralisation axis indicates have created a new framework for our scenarios this how close the production and management year. We continue to use our 2x2 matrix, however, of energy is to the end consumer, moving the scenarios are now aligned to two new axes: up the axis from large-scale central to • speed of decarbonisation smaller-scale local solutions. All scenarios • level of decentralisation. show an increase in decentralised production of energy compared with today. The speed of decarbonisation axis is driven by policy, economics and consumer You can find more information about the 2018 attitudes. All scenarios show progress towards FES on our website1. Chapter 3 of the FES decarbonisation, with Community Renewables document discusses the two new axes in and Two Degrees meeting the 2050 target. more detail. Figure 2.1 provides a brief overview of each of the scenarios and their relative position on the 2x2 matrix.
Figure 2.1 The 2018 scenario matrix
Consumer Community Evolution Renewables
Steady Two Progression Degrees Level of decentralisationLevel of
Speed of decarbonisation
1 http://fes.nationalgrid.com/ 13 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
Community Renewables Steady Progression The 2050 decarbonisation target is achieved This scenario is more centralised. It makes through a more decentralised energy landscape. progress towards the 2050 decarbonisation Community Renewables is based on the target but does not meet it. Steady Progression Consumer Renewables sensitivity2 from FES 2017. combines elements from Steady State and Slow Progression from FES 2017. Two Degrees The decarbonisation target is met using larger Consumer Evolution and more centralised technologies. This scenario This is a more decentralised scenario which makes builds on Two Degrees from FES 2017, combined progress towards the decarbonisation target, but with hydrogen heating from the Decarbonised Gas fails to achieve the 80 per cent reduction by 2050. sensitivity also from FES 2017. This scenario builds on a blend of Consumer Power and Slow Progression from FES 2017.
2 In order to explore uncertainties FES 2017 contained four sensitivities which considered a broader range of energy pathways (in addition to the four main scenarios). 14 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
2.2 Networks
The FES data is applied to simulation models of It details how the generation, demand and the NETS to analyse their impact on the network interconnector data are processed and applied and assess its performance. to the NETS. Diagrams and details of the network models are provided in Appendices A and B. The Security and Quality of Supply Standards (SQSS)3 set out the criteria and methodology for planning the NETS. Appendix H provides further details about the standard planning criteria.
3 https://www.nationalgrideso.com/codes/security-and-quality-supply-standards 15 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
16 National Grid ESO | November 2018 Electricity Ten Year Statement 2018 Chapter 3 The Electricity Transmission Network
3.1 Introduction 18 3.2 NETS background 19 3.3 NETS boundaries 20 3.4 Network capability and requirements by region – Scottish boundaries 25 3.5 Network capability and requirements by region – The North of England boundaries 44 3.6 Network capability and requirements by region – Wales and the Midlands boundaries 53 3.7 Network capability and requirements by region – The East of England boundaries 62 3.8 Network capability and requirements by region – The South of England boundaries 67 3.9 Probabilistic thermal analysis case study 82 3.10 Regional voltage analysis case study 86
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3.1 Introduction
The GB National Electricity Transmission System must continue to adapt and be developed so power can be transported from source to demand, reliably and efficiently. To make sure this happens, we must understand In this chapter, we describe the NETS its capabilities and the future requirements that characteristics. We also discuss each of the NETS may be placed upon it. When we assess future boundaries, grouped together as regions, to help requirements, we need to bear in mind that we you gain an overview of the total requirements, have a large number of signed contracts for new both regionally and by boundary. generation to connect to the NETS. In addition, the development of interconnectors connecting This chapter also provides analysis to show you Great Britain to the rest of the Europe will have how, and when in the years to come, the NETS a big impact on future transmission requirements. will potentially face network capacity deficits on a number of its boundary regions. These deficits In our experience, it is unlikely that all customers will predominantly be faced in the future. will connect exactly as contracted today. We cannot know exactly how much and when generation will We also provide more in depth discussion for some close and new generation will connect, so we use regions in terms of high voltage management our future energy scenarios to help us decide on and year round thermal analysis. You can find the credible ranges of future NETS requirements and preliminary results in this chapter. The full reports its present capability. will be published separately.
This is done using the system boundary The results presented in this chapter will be used concept. It helps us to calculate the NETS’s in the NOA 2018/19 to present an assessment of boundary capabilities and the future transmission the ESO’s preferred reinforcement options, and requirements of bulk power transfer capability. recommendations to address the potential future The transmission system is split by boundaries1 NETS boundary capacity deficits. that cross important power flow paths where there are limitations to capability or where we expect additional bulk power transfer capability will be needed. We apply the SQSS2 to work out the NETS boundary requirements.
1 Please note that these boundaries will be reviewed annually and updated as appropriate. 2 https://www.nationalgrideso.com/codes/security-and-quality-supply-standards 18 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
3.2 NETS background
The NETS is mainly made up of 400kV, 275kV and 132kV assets connecting separately owned generators, interconnectors, large demands and distribution systems. As the ESO, we are responsible for managing the National Grid Electricity Transmission owns the system operation of the transmission networks transmission network in England and Wales. The in England, Wales, Scotland and offshore. The transmission network in Scotland is owned by two ‘transmission’ classification applies to assets at separate transmission companies: Scottish Hydro 132kV or above in Scotland or offshore. In England Electric Transmission in the north of Scotland and and Wales, it relates to assets at 275kV and above. SP Transmission in the south of Scotland. The offshore transmission systems are also separately owned. Sixteen licensed offshore transmission owners (OFTOs)3 have been appointed through the transitional tendering process. They connect operational offshore wind farms that were given Crown Estate seabed leases in allocation rounds.
3 https://www.ofgem.gov.uk/system/files/docs/2018/08/electricity_registered_or_service_addresses_new.pdf 19 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
3.3 NETS boundaries
To provide an overview of existing and future transmission requirements, and report the restrictions we will see on the NETS, we use the concept of boundaries. A boundary splits the system into two parts, crossing critical circuit paths that carry power between the areas where power flow limitations may be encountered.
The transmission network is designed to make GB NETS boundary map sure there is enough transmission capacity to send Figure 3.1 shows all the boundaries we have power from areas of generation to areas of demand. considered for our ETYS analysis. Over the years, we have continuously developed the transmission Limiting factors on transmission capacity include network to ensure there is sufficient transmission thermal circuit rating, voltage constraints and/or capacity to effectively transport power across dynamic stability. From the network assessment, the country. the lowest known limitation is used to determine the network boundary capability. The base capability of each boundary in this document refers to the capability expected for winter 2018/19.
Defining the NETS boundaries has taken many years of operation and planning experience of the transmission system. The NETS’s boundaries have developed around major sources of generation, significant route corridors and major demand centres. A number of recognised boundaries are regularly reported for consistency and comparison purposes. When significant transmission system changes occur, new boundaries may be defined and some existing boundaries either removed or amended (an explanation will be given for any changes). Some boundaries are also reviewed but not studied because of no significant changes in the FES generation and demand data of the area from the previous years. For such boundaries, the same capability as the previous year is assumed.
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Figure 3.1 GB NETS boundaries B0 B0 Substation Substation B0 400kV Substations 275 kV Substations B0 132kV Substations 400kV Substations Circuit 400kV 275 kV Substations 275kV 220kV 132kV Substations 132kV Dounreay Thurso South Offshore AC Cable
Spittal Offshore DC Cable Mybster Interconnectors
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WalneyPersley Hutton B2a B11 Kintore Extension Glen Ormonde WillowdaleWalney I & II uernmore roadford Heysham Osbaldwick Morrison Knaresborough B16 Middleton arrow Thornton WoodhillWest of Duddon Sands radford Clayhills West Kirkstall Skelton Poppleton Creyke eck Westermost Rough Caennacroc Foyers StanahAberdeenPadiham Grange Monk oat of B7a Fryston Saltend North Hedon Fort Augustus Penwortham Drax Humber Gateway Garten Craigiebuckler Elland Saltend South Ta rland Eggborough uoich Redmoss Rochdale Ferrybridge Glendoe To Ireland NW4 B11 To Ireland Washway Keadby Humber Refinery B16 Thorpe B8 Farm Kearsley Whitegate Te mpleborough Killingholme EC1 NW3 urbo Kirkby West Marsh South Invergarry ank I&II Carrington Stalybridge Melton Humber Grimsby West Gwynt y Mor Pitsmoor West Wylfa Rainhill South Stocksbridge Aldwarke ank NW2 irkenhead Manchester Winco ank urton Fetteresso redbury Neepsend Thurcroft B9 Rhyl Flats Fiddlers North Hoyle Rocksavage Daines Sheffield City Ferry Kincardine Cottam EC3 rinsworth Race ank Dudgeon NW1 Flintshire Frodsham ordanthorpe Melgarve odelwyddan ridge Norton Lees Pentir Macclesfield Inner Dowsing Capenhurst Chesterfield Lincs High Dinorwig Connah s uay Kinlochleven NW1 Fiddes Marnham Lynn Sheringham Shoal EC5 Tummel Staythorpe Legacy Ffestiniog Cellarhead EC3 Stoke ardolph icker Fen NW2 Ratcliffe Fort William Errochty Power Station Willington on Soar Errochty rechen Trawsfynydd B17 NW3 Walpole Rannoch Rugeley Drakelow Spalding B2 North Scroby sands Sutton Necton Clunie Ironbridge Ryhall Norwich Main ushbury ridge EC5 NW4 Willenhall Shrewsbury Penn ustleholm Enderby Tummel ridge Tealing Hams Hall Ocker Hill Nechells Coventry Dudhope Oldbury Arbroath Kitwell erkswell Lochay L1E Cashlie Lyndhurst Milton of Craigie urwell Main Si ewell Feckenham B4 Grendon ishops Wood Eaton B15 B8 Socon Taynuilt Killin Charleston Patford ramford Dalmally Finlarig B9 Dudhope ridge Cruachan urghmuir Glenagnes Greater Gabbard Sundon S3C East Claydon Pelham raintree B12 Wymondley Leighton St. Fillans Rassau u ard Greater Gabbard 2nd part Galloper Nant Inverarnan Walham Rye House S2C Clachan Rhigos Imperial rimsdown Park Waltham Cross Gunfleet Sands I&II SCOTTISH HYDRO-ELECTRIC Cowley B14Watford Highbury To Netherlands Cupar Pembroke Swansea North B5Elstree London Array Amersham Main Hackney Tottenham Rayleigh Main B1 aglan ay Cilfynydd Culham Mill Hill Redbridge TRANSMISSION Minety Warley Inveraray Sloy SW1 Margam pper oat skmouth Iron Acton Didcot Willesden Kensal Green West Ham Coryton Whitson Iver arking Pyle Ealing Pudding St ohns City Rd Mill Grain Glenrothes Hurst West Thurrock Tilbury Wood Thanet Seabank Kentish Flats SC1 New Cross Wimbledon Northfleet Laleham Littlebrook Kingsnorth Tremorfa East Chessington Singlewell Kemsley Cleve Hill Leven Aberthaw Cardiff Melksham Rowdown Devonside East ramley West Weybridge eddington WestfieldSW1 To elgium B1a Redhouse Fleet Canterbury Whistlefield Kincardine North Dunfemline GlennistonB10 Hinkley Point Sellindge Stirling West Sellindge Denny Mossmorran ridgwater Port Ann B13 Alverdiscott Longannet Inverkeithing olney Dunbar Taunton Nursling Helensburgh onnybridge Grangemouth Shrubhill Cocken ie Dungeness Dunoon Spango Te lford Rd. Marchwood Cumbernald Portobelllo Mannington Lovedean Ninfield Va lley Strathleven ainsford Gorgie Crystal Rig To rness Axminster Windyhill roxburn otley Wood Drumcross Whitehouse Fawley Erskine Lambhill SC1 Exeter B2 athgate Kaimes S3C Devol Easterhouse Currie Fallago To France Livingston Smeaton Chickerell Moor Coatbridge Newarthill Rampion B6 Langage Abham B15 Crossaig Hunterston Neilston Clydes Mill B10 lack Law Extension Landulph NorthHunterston Strathaven Dunlaw ExtensionIndian ueens erwick East lack Law Marshall Meadows B12 usby L1E East S2C Kilwinning Whitelee Wishaw Hunterston Kilmarnock Kilbride B3b Saltcoats To wn South Whitelee Extn Linnmill Eccles B13 Meadowhead SP TRANSMISSION LTD Carradale Kilmarnock Galashiels South Coalburn Ayr Clyde North Coylton Clyde South Elvanfoot Hawick New Cumnock Maybole Moffat Auchenwynd lack Hill Glenglass
Hadyard Dun Hill Harestanes
B3b Ewe Hill Kendoon To NorthernB4 Ireland Markhill Carsfad lackcraig Earlstoun Gretna lyth Arecleoch Kilgallioch Dumfries Ecclefechan Auchencrosh Glenlee Fourstones Newton Stewart Tynemouth Chapelcross Harker South Shields Stella West Tongland West oldon Glenluce 21 B5 Offerton Hawthorne Pit Western Hartmoor Spennymoor HVDC Hartlepool Saltholme Tod Point Teesside B7 Link Cashlie Norton Robin Rigg Greystones Grangetown B6 Lackenby B7 B7a
Walney Hutton B11 Extension Ormonde
Walney I & II uernmore Heysham Osbaldwick Knaresborough B16 Middleton arrow Thornton West of Duddon Sands radford West Kirkstall Skelton Poppleton Creyke eck Westermost Rough Stanah Padiham Grange Monk B7a Fryston Saltend North Hedon Penwortham Drax Humber Gateway Elland Saltend South Eggborough Rochdale Ferrybridge To Ireland NW4 B11 To Ireland Washway Keadby Humber Refinery B16 Thorpe B8 Farm Kearsley Whitegate Te mpleborough Killingholme EC1 NW3 urbo Kirkby West Marsh South ank I&II Carrington Stalybridge Melton Humber Grimsby West Gwynt y Mor Pitsmoor West Wylfa Rainhill South Stocksbridge Aldwarke ank NW2 irkenhead Manchester Winco ank urton redbury Neepsend Thurcroft B9 Rhyl Flats Fiddlers North Hoyle Rocksavage Daines Sheffield City Ferry Cottam EC3 rinsworth Race ank Dudgeon NW1 Flintshire Frodsham ordanthorpe odelwyddan ridge Norton Lees Pentir Macclesfield Inner Dowsing Capenhurst Chesterfield Lincs High Dinorwig Connah s uay NW1 Marnham Lynn Sheringham Shoal EC5 Staythorpe Legacy Ffestiniog Cellarhead EC3 Stoke ardolph icker Fen NW2 Ratcliffe Willington on Soar Trawsfynydd B17 NW3 Walpole Rugeley Drakelow Spalding North Scroby sands Sutton Necton Ironbridge Ryhall Norwich Main ushbury ridge EC5 NW4 Willenhall Shrewsbury Penn ustleholm Enderby Hams Hall Ocker Hill Nechells Coventry Oldbury Kitwell erkswell L1E urwell Main Si ewell Feckenham Grendon ishops Wood Eaton B15 B8 Socon
Patford ramford B9 ridge Greater Gabbard Sundon S3C East Claydon Pelham raintree B12 Wymondley Leighton Rassau u ard Greater Gabbard 2nd part Galloper Walham Rye House S2C Rhigos Imperial rimsdown Park Waltham Cross Gunfleet Sands I&II Cowley B14Watford Highbury Swansea North Elstree London Array To Netherlands Pembroke Amersham Main Hackney Cilfynydd Culham Mill Hill Tottenham Redbridge Rayleigh Main aglan ay Minety Warley SW1 Margam pper oat skmouth Iron Acton Didcot Willesden Kensal Green West Ham Coryton Whitson Iver arking Pyle Ealing Pudding St ohns City Rd Mill Tilbury Grain Wood Hurst West Thurrock Thanet Seabank Kentish Flats SC1 New Cross Wimbledon Northfleet Laleham Littlebrook Kingsnorth Tremorfa East Chessington Singlewell Kemsley Cleve Hill Aberthaw Cardiff Melksham Rowdown East ramley West Weybridge eddington SW1 To elgium Fleet Canterbury North B10 Hinkley Point Sellindge West Sellindge ridgwater B13 Alverdiscott olney Taunton Nursling Dungeness Mannington Marchwood Lovedean Ninfield Axminster SC1 Fawley otley Wood Exeter S3C Chickerell To France Rampion Langage Abham B10 B15 Indian ueens Landulph B12 L1E S2C
B13 National Grid ESO | November 2018 Electricity Ten Year Statement 2018
To help describe related issues, we have grouped the boundaries into five regions, as shown in Figure 3.2.
Figure 3.2 Regional map
Dounreay Thurso South
Spittal Mybster
Cassley Stornoway Dunbeath