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

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A 3.8 Country-specific comments – the Netherlands Reference scenario Reference Scenario Radial Design Map Reference Scenario Meshed Design Map The Reference Scenario shows an installed offshore wind capacity for the Netherlands of 6000MW. This capacity is divided between four new areas: Eemshaven 1000MW Beverwijk1 1000MW Beverwijk2: 2500MW Borssele 1000MW And one existing offshore windfarm of 500 MW connected at Velsen. Interconnectors The cross-border connections between the Netherlands and Belgium are heavily overloaded: Kreekrak – Zandvliet, and Maasbracht – VanEijck Upgrading both Maasbracht –VanEijck and Kreekrak – Zandvliet to 2635MVA can increase the cross-border capacity between the Netherlands and Belgium. In the Belgian grid additional reinforcements are required to accommodate this upgrade as described previously. In addition to the reinforcement of existing cross-border connections an offshore HVDC link of 1000 MW between Borssele and Zeebrugge is introduced. Page7-51
There are no overloads on the cross-border connections between the Netherlands and Germany. Offshore connections In the radial design all the offshore windfarms are connected to the nearest substation. Those closer to the coast are connected via AC connections while those further away are connected using HVDC VSC technology. To achieve a more dispersed grid in-feed, the largest windfarm, Beverwijk, is split in two parts and connected to the substations of Beverwijk and Vijfhuizen. In addition to the offshore wind connections, the need for a new interconnector between the Netherlands (Borssele) and Great Britain was identified. In the Reference Scenario the prices in Great Britain are high compared to the prices in continental Europe, resulting in several additional interconnectors to Great Britain. In the meshed design some changes can be seen in the offshore grid structure. The windfarms are still connected to the closest onshore substation with a minor change in the Beverwijk windfarm, which is connected to Diemen instead of to Vijfhuizen. This change is caused by the fact that an additional offshore connection to Maasvlakte is introduced, causing an additional in-feed in the area. The East Anglia 1,2,3,4 windfarm is now connected in a meshed way to the Netherlands and Great Britain via a HVDC VSC connection. Onshore reinforcement The locations and amounts of offshore wind power in the Reference Scenario are very similar to the data used in the national TenneT ten year grid development plan (Quality and Capacity Plan 2011). Overloads in the internal grid that were observed in this scenario are therefore not new. They have been identified on the following lines: Geertruidenberg – Krimpen, Hengelo – Zwolle, and Eindhoven – Maasbracht. To mitigate these overloads several grid reinforcements are proposed. Internally in the Dutch grid it can be seen that overloads larger than 20% appear in the intact network already for a significant number of hours per year. Since the overloads are more than 20% (especially under N-1 conditions) upgrading of these lines (reconductoring) to 4 kA (2635MVA) is required. Furthermore, the need for a new connection between the Western and Eastern part of the main 380kV ring was identified to be able to transport all offshore wind power and conventional generation at the coastal locations. The impact of the meshed solution on the onshore grid is very similar to the impact of the radial solution; therefore the exact same possible reinforcements are introduced. The main change in the reinforcements is the offshore connection between Borssele and Zeebrugge that has been replaced by the offshore meshed solution via East Anglia and BOFF. Page7-52
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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
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Going forward, additional scenarios
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Therefore, if future targets are li
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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,
Page 111 and 112: A 3.2 Country-specific comments - D
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 and 124: RES+ commentary The RES+ sensitivit
Page 125 and 126: Table 7-6 Offshore Generation level
Page 127: A 3.7 Country-specific comments - L
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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