Roger(海上风电场电气系统)

Seabed བֈ
Cable and draw tape are gently lowered to seabed 牵引绳和电缆被轻放到海床
Electrical Collection Systems – J-tubes Entry 馈电系统——Jྦྷ管ଝ‫ݡ‬ᨸ
Draw tape is gently pulled up through J Tube
Electrical system
电气系统
Passive but project specific
ҙ变的 视项目情况而定
Wind turbines
风机
Active but not project specific
变化的 ú۷与项目情况
ʹ关
2. Electrical Collection System 馈电系统
Offshore Substations – Examples བս‫ۥ‬压站——样例
Photo courtesy of London Array Limited 2 x 150 /33kV 180MVA
Photo courtesy of Lillgrund wind farm / Vattenfall 138 /33kV 120MVA (48x2.3MW Siemens WTGs)
(Side of) transition piece 过渡连接器件
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Seabed བֈ
Electrical Collection Systems – J-tubes Entry 馈电系统——Jྦྷ管ଝ‫ݡ‬ᨸ
(Side of) transition piece 过渡连接器件
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dramatically and burial may not be feasible. • 当海床是岩石或者鹅卵石时成本会非常高，ܹ౱电缆埋地变
ƥҙ可ï
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Electrical Collection Systems – Summary 馈电系统——概述
• Radial strings up to about 30-40MW •়ၞϋ径内输送功率高至30-40ஹ࣌ • ≤ 36kV voltage optimal •≤36kV 优化电压等级 • Cable types can be XLPE or EPR •电缆可以选择XLPE࿫ઝEPR • Installation rates of 1-2 inter-turbine lengths per day •‫ݡ‬ᨸٗŏ为每天1-2๊风机之间的连线 • J-tubes used for turbine entry/exit – fiddly ! •Jྦྷ管यस风机的进出线——高औ求 • Generally best buried unless NO human activity and benign sea environment •๦և来说最好将电缆埋地，ளԋ没有人类活动或者对于环境友好
• Some manufacturers may offer better prices. ়Ԣ஡௠ց可਩ந供更࿆ଝ价格
Installation very variable at €200 - €400 per m (or more) ‫ݡ‬ᨸؔ҇会在200-400欧元/Π间大幅变化（ܹ౱更高）
• Low end for jetting or ploughing in ‘soft’ seabed. • 当海床很软时，喷射与犁地的成本较低 • Once rock or boulders are involved costs can go up
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3. Offshore Substations བս‫ۥ‬压站
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Offshore Substations – Introduction བս‫ۥ‬压站——简介
Is it necessary to have an offshore substation ? བս‫ۥ‬压站是必需的吗？ If the project is ߰果这个项目是：
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Electrical Collection Systems – Layouts 馈电系统——ໃ局
བս‫ۥ‬压站
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32MW per string ̌ț32ஹ࣌
Trend is for radial circuits without additional links ϶Գ状接线不附带额外连接是未来趋势
)ณ 15%
.础 15%
电气系统 20%
风机 50%
… and typically about 20% of project costs ଱ྦྷଝ电气系统成本为项目总成本的20%
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Introduction - Technical Interactions 简介——9术交ೀ
Three electrical parts ձ项电气ҾӅ
๦过Jྦྷ管轻拉牵引绳
(Side of) transition piece 过渡连接器件
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Seabed བֈ
Electrical Collection Systems – J-tubes Entry 馈电系统——Jྦྷ管ଝ‫ݡ‬ᨸ
(Side of) transition piece 过渡连接器件
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1. Introduction 简介
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Introduction - General Electrical System 简介——电气系统
电气系统典型单线图(SLD)
Existing grid 现有电网
onshore substation ‫ݢ‬ս‫ۥ‬压站
Horns Rev ༎Ժ韦夫（ø麦）
Offshore Substations – Examples བս‫ۥ‬压站——样例
Photo courtesy of Siemens / Gwynt-y-Môr
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DolWin1 HVDC Topside Structure (Image Courtesy Heerema HFG)
๦过Jྦྷ管轻拉牵引绳
(Side of) transition piece 过渡连接器件
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The pulling exercise at this point can become difficult and require diver assistance
૥೅处牵引工作可能会变得困难， ‫ڦ‬औᨤ‫ڂ‬员协助
Photo courtesy of Stemat BV / Walney 2
Jetting Tool 喷射工具
Electrical Collection Systems – J-tubes 馈电系统——Jྦྷ管
内部
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Electrical Collection Systems – J-tubes Entry 馈电系统——Jྦྷ管ଝ‫ݡ‬ᨸ
Subsea HV cable
བ૽高压电缆
offshore
substation བս‫ۥ‬压站
风机
风机升压变压器
offshore collection system subsea cabling
བս风电场内部馈电电缆
陆上
བս
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Introduction - Electrical System Costs 简介——电气系统成本
Electrical Collection Systems – Cable Installation 馈电系统——电缆安装
Tools – mainly plough, jetter, or rock cutter … 工具 – ఆʯ, 喷射器, ‫ୖבݰ‬༧,…
Plough ʯ
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Offshore Substations – Single Line Diagram བս‫ۥ‬压站——电气单线图
Transmission / Export sபைடு நூலகம்stem 传输电缆/ෆ口电缆
Transformer (s)ఆ变压器 E.g. 132 / 33kV
…small, c. 100MW or less 功ٞҙĵ，Ӳ߰‫خ‬स100MW
…and close to shore, c. 15km or less 并且与岸边距离很近，Ӳ߰‫د‬स15km
…and connecting to the grid at collection voltage, e.g. 33kV, 并且与电网可以以相应的中压电压等级连接
电缆与牵引绳被轻放到海床
(Side of) transition piece 过渡连接器件
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Seabed བֈ
Electrical Collection Systems – J-tubes Entry 馈电系统——Jྦྷ管ଝ‫ݡ‬ᨸ
Draw tape is gently pulled up through J Tube
Module B
Module C
Module PlatfMoormduDleeck
B
ຮ๊C甲ຈ
33kV电缆过 ř,
电缆平台
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Offshore Substations – Examples བս‫ۥ‬压站——样例
Barrow (Installed) 架设Ň঑（ਰ‫ݡ‬ᨸ࿆）
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• Electricity Network (Grid)电网 • Electricity Network (Grid)风机 • Wind farm electrical system风场电气系统
Grid 电网
Active and project specific
变化的 视项目情况而定
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DNV GL © 2013
Offshore Substations – Barrow བս‫ۥ‬压站——‫ݡ‬ᨸ
͇块A
ఆ变压器
Module A
P+132+ M+1-W*
辅助A变u压xi器lia ry
Transf
ormer
132kV电缆过渡器
Module E
Heli-Lift ౺‫ۥ‬机୭
机ອ
Module D
Offshore Wind Farm Electrical System 海上风电场电气系统
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SAFER, SMARTER, GREENER
Offshore Wind Farm Electrical System Overview བս风电场电气系统概览
1. Introduction 简介 2. Electrical collection systems馈电系统 3. Offshore substations海上升压站 4. Transmission systems输电系统 5. Onshore works陆上系统
Seabed བֈ
Electrical Collection Systems – J-tubes Entry 馈电系统——Jྦྷ管ଝ‫ݡ‬ᨸ
Draw tape is gently pulled up through J Tube ๦过Jྦྷ管轻拉牵引绳
Cable and draw tape are gently lowered to seabed
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Seabed བֈ
Electrical Collection Systems – Costs 馈电系统——ؔ҇
36kV cable costs: 95 to 630mm2: €120 to €460 per m 36kV电缆成本：95-630ຮϷ࿍Π：120欧元-460欧元/Π
then the answer is probably no, else yes. |么，Ĥ‫ݥ‬可ï۷ҟୱଝ，当然也可能是肯定的。 Most early projects (UK, S, NL) answer yes to the first two questions and often the third. Hence most are without an offshore substation. 绝大多数ு=ଝ项目（ࡷ国，ׁϕ݈，༎兰）ũ满足上面前两条，੮Ԣ满足第 ձ条。‫ر‬਩ᶾöũ۷没有海上升压站的。