The North Seas Countries' Offshore Grid Initiative - Initial ... - Benelux

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A 3.6 Country-specific comments – Ireland and Northern Ireland Reference Scenario Reference Scenario Radial Design Map Interconnectors Reference Scenario Meshed Design Map The existing Moyle Interconnector between Northern Ireland and Scotland and the recently commissioned East West Interconnector between Ireland and Wales were assumed to have import and export capacities of 500 MW. The Reference Scenario analysis identified the need for a 1 GW HVDC interconnector between Northern Ireland and Great Britain (Scotland) and another between Ireland and France. The main drivers were high imports from Great Britain and France, particularly when renewable generation levels were low and thermal plant was out of merit on the island. In Ireland the interconnection termination location was determined to be at the Great Island 400 kV station and in Northern Ireland at the Ballylumford 275 kV station. The interconnectors were accommodated without additional network reinforcement beyond what is already planned. In relation to the France- Ireland interconnector (1GW), a bilateral EirGrid-RTE study is currently being carried out to assess other constraints (i.e. voltage constraints) Offshore Connections The assumed offshore generation levels and locations for the Ireland and Northern Ireland Reference Scenario were as outlined in the table below. Due to the relatively small size of the wind farms assumed in the scenario and the short distances from the existing onshore network, the optimisation analysis produced the same result for the radial and meshed network configurations. In summary, for the levels of offshore generation assumed in the Reference Scenario, all the offshore wind farm network connections could be realised with single HVAC radial connections. Page7-47
Table 7-6 Offshore Generation level and locations Offshore Wind Farms Reference Scenario RES+ Sensitivity Capacity (MW) Capacity (MW) Arklow (Ireland) 400 1,100 Codling (Ireland) 578 2,000 Kish (Ireland) 360 884 Oriel (Ireland) 330 700 Glassgorman (Ireland) - 600 East Coast (Northern Ireland) - 800 Tunes (Northern Ireland) - 200 Coleraine (Northern Ireland) 200 200 Tandragee (Northern Ireland) 400 400 Totals 2,268 6,884 In the Reference Scenario, a meshed option could be considered by connecting the Kish and Codling offshore wind farms with the addition of an offshore HVAC circuit and connecting to the onshore network via HVAC circuits. However to ensure N-1 compliance and to accommodate the full capacity of this group of wind farms (978 MW), two to three HVAC circuits could be required and hence, in this instance, would make the radial configuration a more favourable option in comparison due to significantly less reinforcement requirements. Onshore Reinforcement In Ireland the need for onshore network reinforcement was identified in the part of the network south of Dublin, the main demand centre, due to the connections of the Kish, Codling and Arklow offshore wind farms. In particular, planning cases with high wind generation, and low thermal generation, resulted in high power flows into the south Dublin network necessitating the reinforcement of the Arklow-Carrickmines-Poolbeg 220 kV circuit. The Oriel wind farm was looped into the Louth – Woodland 220 kV circuit without the need for additional reinforcement. In the north west of the island, the cross border Renewable Integration Development Project (RIDP) was assumed in place. In Northern Ireland, and the Coleraine and Tandragee offshore wind farms could be accommodated without additional network reinforcements. Specific Comments Relating to Existing National Plans A number of TYNDP projects were significant in realising the connection of high levels of offshore generation: RIDP: This project allowed for the connection of onshore wind generation in the northwest of the island and offshore wind generation, particularly off the north coast of Northern Ireland. Page7-48
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The North Seas Countries’ Offshor
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5.1.5 Comparison of Costs and Calcu
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Executive Summary Recognising the i
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Approach adopted The process adopte
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Figure 0-3 Comparison of installed
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Figure 0-6 Meshed Grid Design for 2
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1 Background and Context (Programme
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1.1.2 Statement of Aims and Objecti
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Scope The information contained wit
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facilities using other primary reso
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The results of this study compare t
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1.1.7 Scenario based planning and T
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2 Methodology Overview 2.1 Overview
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2.3 Market Modelling I System Adequ
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3 Development of the 2030 Hypothesi
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In the use of data it is important
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than a best view approach. A scenar
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3.4 Assumptions In addition to the
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Figure 3-6TYNDP Projects 2012 - 201
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References. All other generation /
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meets some portion of its demand us
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Figure 4-4 Import/Export Balance as
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5 Grid designs 5.1 Grid Configurati
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Figure 5-1 Radial Grid Design for 2
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5.1.1 Statistics for Grid Design Op
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5.1.2 Investment Costs for Grid Des
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CAPEX [€'m] 14,000 12,000 10,000
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CAPEX [€'m] 35,000 30,000 25,000
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5.1.4.1 Annual Production Cost Savi
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increased interconnection, coal-fir
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There is a large increase in gross
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The costs and the benefits for the
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Figure 5-16 : Map of OWP locations
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Figure 5-18 : Map of meshed grid de
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To provide an indication of total c
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6 Conclusions and Outlook 6.1 Discu
Page 73 and 74: Going forward, additional scenarios
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Page 79 and 80: A 1 Detailed Description of Methodo
Page 81 and 82: Figure 7-2 High level Process overv
Page 83 and 84: In particular, PEMMDB generation an
Page 85 and 86: A 1.3 Grid Expansion Approach (Grid
Page 87 and 88: Table 7-1: Summary of the Model Par
Page 89 and 90: Technology choices that were consid
Page 91 and 92: configurations that typically consi
Page 93 and 94: A 2 NSCOGI reference scenario - det
Page 95 and 96: A 2.2 Details by country- Belgium I
Page 97 and 98: A 2.4 Details by country- France In
Page 99 and 100: A 2.6 Details by country- Great Bri
Page 101 and 102: A 2.8 Details by country- Luxembour
Page 103 and 104: A 2.10 Details by country- Netherla
Page 105 and 106: A 2.12 Details by country- Sweden I
Page 107 and 108: A 3 Country specific comments The f
Page 109 and 110: to the Netherlands are much lower,
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Page 113 and 114: For the meshed design, only the int
Page 115 and 116: Interconnectors The total France -
Page 117 and 118: The main RES+ Scenario challenge fo
Page 119 and 120: connected directly to the shore. On
Page 121 and 122: A 3.5 Country-specific comments - G
Page 123: RES+ commentary The RES+ sensitivit
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Page 129 and 130: There are no overloads on the cross
Page 131 and 132: Table 7-7 Bottlenecks in the Dutch
Page 133 and 134: Interconnectors The radial design i
Page 135 and 136: In the meshed design the connection
Page 137 and 138: A 5 Abbreviations ACER Agency for t
Page 139 and 140: A 6 List of References Background M
Page 141 and 142: National (Grid) Development Plans [
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