eirgrid - your grid, your views,your tomorrow - appendix 1

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  • eirgrid.com/yourgridyourviews

    Your Grid, Your Views,

    Your Tomorrow.A Discussion Paper

    on Irelands Grid Development Strategy

    Appendix 1

  • Page B EirGrid Irelands Draft Grid Development Strategy - Appendix 1

    Appendix 1EirGrid Technical Analysis

  • Page B EirGrid Irelands Draft Grid Development Strategy - Appendix 1 EirGrid Irelands Draft Grid Development Strategy - Appendix 1 Page 1

    EirGrid Technical Analysis Page 1

    EIRGRID

    Grid 25 review EirGrid Technical Analysis

    3/27/2015

  • Page 2 EirGrid Irelands Draft Grid Development Strategy - Appendix 1

    EirGrid Technical Analysis Page 2

    Table of Contents Chapter 1: Introduction ......................................................................................................................4

    Chapter 2: Drivers of Grid Investment .................................................................................................5

    Changes in Demand for Electricity ............................................................................................................ 5

    Regional Demand Growth ..................................................................................................................... 7

    Forecasting Demand ............................................................................................................................. 7

    Population Change ................................................................................................................................ 7

    Changing Generation Patterns .................................................................................................................. 8

    Renewable Generation ......................................................................................................................... 8

    Conventional Generation .................................................................................................................... 10

    Interconnection....................................................................................................................................... 10

    Chapter 3: Technology ..................................................................................................................... 12

    Technological changes ............................................................................................................................ 13

    Reactive Power .................................................................................................................................... 14

    System Inertia ..................................................................................................................................... 14

    Harmonic Distortion ............................................................................................................................ 14

    Technology Available now ................................................................................................................... 15

    New High Temperature Low Sag (HTLS) overhead line conductors ................................................... 15

    AC underground cable technology and its use ................................................................................... 15

    Linear HVDC and DC transmission ...................................................................................................... 16

    Series Compensation .......................................................................................................................... 17

    Dynamic Line Rating ............................................................................................................................ 17

    Reactive Power Management Devices ............................................................................................... 18

    Technology Ready for Trial Use............................................................................................................ 19

    Power Line Guardians ......................................................................................................................... 19

    Voltage Uprating ................................................................................................................................. 19

    Super-Conducting Fault Current Limiters ........................................................................................... 20

    New Overhead Line Structures/New Pylon Design............................................................................. 21

    Technology Research & Design Stage .................................................................................................. 21

    Complex DC Networks ........................................................................................................................ 21

    New Voltage Uprating Strategies ........................................................................................................ 22

    Other Smart Grid Concepts ..................................................................................................................... 22

    Chapter 4: Proposed Strategy for Grid Development ......................................................................... 23

    Strategy 1 ............................................................................................................................................ 23

    Strategy 2 ............................................................................................................................................ 24

  • Page 2 EirGrid Irelands Draft Grid Development Strategy - Appendix 1 EirGrid Irelands Draft Grid Development Strategy - Appendix 1 Page 3

    EirGrid Technical Analysis Page 3

    Strategy 3 ............................................................................................................................................ 24

    Impact of technological choice ............................................................................................................... 24

    Proposed Grid Development Strategy .................................................................................................... 25

    Chapter 5: Regional Development and Major Projects ...................................................................... 28

    North East Region ................................................................................................................................... 32

    The North-South Interconnector Project ............................................................................................ 34

    South East Region ................................................................................................................................... 35

    The Grid Link Project ........................................................................................................................... 38

    North West Region .................................................................................................................................. 40

    The Grid West Project ......................................................................................................................... 42

    The Northwest Project ........................................................................................................................ 43

    West Region ............................................................................................................................................ 44

    The Moneypoint North Kerry Project .............................................................................................. 46

    Moneypoint 400/220/110 kV substation............................................................................................ 47

    Kilpaddoge 220/110 kV substation ..................................................................................................... 47

    South West Region .................................................................................................................................. 48

    Knockanure, Ballynahulla, and Ballyvouskill substation Projects ....................................................... 50

    Clashavoon Dunmanway 110 kV Circuit ............................................................................................. 51

    East Region .............................................................................................................................................. 52

    Reinforcement of the Greater Dublin Area ........................................................................................ 55

    Belcamp 220/110 kV Substation Project ............................................................................................ 55

    New West Dublin 220/110 kV Substation Projects ............................................................................. 55

    Midlands Region ..................................................................................................................................... 56

    Laois-Kilkenny Reinforcement Project ................................................................................................ 58

  • Page 4 EirGrid Irelands Draft Grid Development Strategy - Appendix 1

    EirGrid Technical Analysis Page 4

    Chapter 1: Introduction EirGrids role, as a state-owned company, is to manage and operate Irelands national grid to ensure a safe, secure supply of electricity to homes, businesses and industry across the island. In order to implement Government en