Shigeru Fujii

Hideo Tanaka(FURUKAWA ELECTRIC CO.,LTD.)(VISCAS Corporation)㻿㼡㼎 㻯 㼕㼚 㻞㻜㻝㻟 㻲㼍㼘㼘 㻵㻯㻯 㻹㼑㼑㼠㼕㼚㼓

Power transmission system for"Fukushima FORWARD Project”-- Power cable systemfor offshore floating type wind farm pilot plant --Project Location㼀㼟㼡㼚㼍㼙㼕 㻰㼍㼙㼍㼓㼑㼐 㻭㼞㼑㼍㻲㼡㼗㼡㼟㼔㼕㼙㼍㻲㼡㼗㼡㼟㼔㼕㼙㼍 㻏㻝㻺㼡㼏㼘㼑㼍㼞 㻼㻛㻿㻹㼍㼞㼏㼔 㻝㻝㻚 㻞㻜㻝㻝㻘 㼑㼤㼠㼞㼍 㼘㼍㼞㼓㼑㼑㼍㼞㼠㼔㼝㼡㼍㼗㼑 㼠㼛㼛㼗 㼜㼘㼍㼏㼑 㼕㼚㻱㼍㼟㼠㻙㻺㼛㼞㼠㼔 㻶㼍㼜㼍㼚 㼍㼚㼐㼞㼑㼟㼡㼘㼠㼑㼐 㼑㼤㼠㼞㼑㼙㼑㼘㼥 㼟㼑㼢㼑㼞㼑㼐㼍㼙㼍㼓㼑 㼕㼚 㼠㼔㼍㼠 㼍㼞㼑㼍 㼍㼟 㼣㼑㼘㼘㼍㼟 㻲㼡㼗㼡㼟㼔㼕㼙㼍 㻏㻝 㼚㼡㼏㼘㼑㼍㼞㻼㻛㻿㻚㻼㼞㼛㼖㼑㼏㼠 㻭㼞㼑㼍2

Project Target¾ Offshore floating wind farm project
9 Introduction of new renewable energy
9 Trial project of total system verification9 Potential availability of wind energy inJapanese EEZ
9 To help industrial revival of Tsunamidamaged regions in Fukushima Prefecture¾ To be performed as consortium project

financed by Japanese government3

Project formation
Fukushima Offshore Wind Farm Consortium

Project Integrator
Japanese Leading Companies㻱㼚㼓㼕㼚㼑㼑㼞㼕㼚㼓㼃㼕㼚㼐 㼀㼡㼞㼎㼕㼚㼑㻹㼍㼞㼕㼚㼑 㻯㼛㼚㼟㼠㼞㼡㼏㼠㼕㼛㼚㻿㼡㼎㼟㼠㼍㼠㼕㼛㼚㻲㼘㼛㼍㼠㼕㼚㼓 㻿㼥㼟㼠㼑㼙㻭㼐㼢㼍㼚㼏㼑㼐 㻿㼠㼑㼑㼘 㻹㼍㼠㼑㼞㼕㼍㼘㻼㼛㼣㼑㼞 㼀㼞㼍㼚㼟㼙㼕㼟㼟㼕㼛㼚…………

Technicaladvisor㼇㻾㼕㼟㼑㼞 㼍㼚㼐 㻿㼡㼎㼙㼍㼞㼕㼚㼑 㻯㼍㼎㼘㼑㼉 㻰㼑㼢㼑㼘㼛㼜㼙㼑㼚㼠 㼍㼚㼐 㻵㼚㼟㼠㼍㼘㼘㼍㼠㼕㼛㼚㻻㼡㼞 㼏㼛㼙㼜㼍㼚㼥 㻲㻿㼡㼎㼏㼛㼚㼠㼞㼍㼏㼠㻻㼡㼞 㼏㼛㼙㼜㼍㼚㼥 㼂4Project Outline (1)㻻㼒㼒 㼟㼔㼛㼞㼑 㼒㼍㼏㼕㼘㼕㼠㼕㼑㼟 㻙㻙㻙 㻲㼕㼚㼍㼘 㼟㼥㼟㼠㼑㼙5㻿㼛㼡㼞㼏㼑 㻦㻲㼡㼗㼡㼟㼔㼕㼙㼍 㻻㼒㼒㼟㼔㼛㼞㼑 㼃㼕㼚㼐 㻲㼍㼞㼙 㻯㼛㼚㼟㼛㼞㼠㼕㼡㼙Project Outline (2)㻝㼟㼠 㻿㼠㼍㼓㼑 㻞㻜㻝㻝㻙㻞㻜㻝㻟㻞㻡㻹㼂㻭㻲㼘㼛㼍㼠㼕㼚㼓 㻿㻛㻿㻞㻹㼃 㼀㼡㼞㼎㼕㼚㼑㻞㼚㼐 㻿㼠㼍㼓㼑 㻞㻜㻝㻠㻙㻞㻜㻝㻡㻣㻹㼃 㼀㼡㼞㼎㼕㼚㼑㻙㻝㻣㻹㼃 㼀㼡㼞㼎㼕㼚㼑㻙㻞

6㻿㼛㼡㼞㼏㼑 㻦㻲㼡㼗㼡㼟㼔㼕㼙㼍 㻻㼒㼒㼟㼔㼛㼞㼑 㼃㼕㼚㼐 㻲㼍㼞㼙 㻯㼛㼚㼟㼛㼞㼠㼕㼡㼙Power Transmission System
1st stage outline㼏㼍㻚 㻞㻡㼗㼙7㻿㼛㼡㼞㼏㼑 㻦㻲㼡㼗㼡㼟㼔㼕㼙㼍 㻻㼒㼒㼟㼔㼛㼞㼑 㼃㼕㼚㼐 㻲㼍㼞㼙 㻯㼛㼚㼟㼛㼞㼠㼕㼡㼙Development of Riser Cable㻯㼕㼓㼞㼑 㼀㻮㻙㻠㻥㻜㻶㻱㻯㻙㻟㻠㻜㻤㻗㻯㼕㼓㼞㼑 㻱㼘㼑㼏㼠㼞㼍 㻺㼛㻚㻝㻣㻝㻙㻙㻙㻙㻙㻙㻙㻿㼠㼍㼠㼕㼏 㼎㼑㼔㼍㼢㼕㼛㼞 㼍㼚㼍㼘㼥㼟㼕㼟㻰㼥㼚㼍㼙㼕㼏 㼎㼑㼔㼍㼢㼕㼛㼞 㼍㼚㼍㼘㼥㼟㼕㼟㻲㼍㼠㼕㼓㼡㼑 㼍㼚㼍㼘㼥㼟㼕㼟㻻㻷㻾㼕㼟㼑㼞 㻯㼍㼎㼘㼑 㻰㼑㼟㼕㼓㼚8

Outline Spec. of Riser Cables
Unit

66kV

22kV

Outer Diameter ofCablemm

175

150

Cable Weightkg/m(in air)

53

43

Moisture/Waterbarrier----

Optical Fiber Unit
Steel Armor-------Corrugated
Stainless SteelStainless Steel Foil LaminatedSheathTape8 fibers x 3 unit 8 fibers x 1 unit
Two Layers
9Important Aspects ofRiser Cable System Development¾ 22kV Riser Cable• Moisture/Water barrier structure and its

properties• Mechanical properties for dynamic
movements¾ 66kV Riser Cable• Mechanical properties for dynamic

movements¾ Transition Joint (66kV Riser to Submarine)• Water pressure resistance• Tensile strength on conductor joint sleeve as

well as whole structure

10Design Flow of Riser Cable (1)㻿㼀㻭㻾㼀㻯㼍㼎㼘㼑 㼜㼍㼞㼍㼙㼑㼠㼑㼞㼟㻿㼑㼍 㼏㼛㼚㼐㼕㼠㼕㼛㼚 㻒 㻲㻿㻖 㼏㼛㼚㼐㼕㼠㼕㼛㼚㻖㻲㻿㻦 㻲㼘㼛㼍㼠㼕㼚㼓 㻿㼠㼞㼡㼏㼠㼡㼞㼑㻯㼍㼎㼘㼑 㼜㼞㼛㼒㼕㼘㼑 㼕㼚 㼣㼍㼠㼑㼞㻿㼠㼍㼠㼕㼏 㻒 㻰㼥㼚㼍㼙㼕㼏㻮㼑㼔㼍㼢㼕㼛㼞 㻭㼚㼍㼘㼥㼟㼕㼟㻜㻺㼑㼡㼠㼞㼍㼘㻲㼍㼞㻺㼑㼍㼞㻙㻞㻜㼆㼇㼙㼉㻙㻠㻜㻯㼍㼘㼏㼡㼘㼍㼠㼕㼛㼚 㼛㼒㻯㼍㼎㼘㼑 㼜㼞㼛㼒㼕㼘㼑㻙㻢㻜㻯㼍㼎㼘㼑㼟 㼏㼍㼚㼎㼑㼍㼞 㻲㻿㼙㼛㼢㼑㼙㼑㼚㼠㻙㻤㻜㻙㻝㻜㻜㻙㻝㻞㻜㻙㻝㻠㻜㻙㻝㻜㻜㻜㻝㻜㻜㻞㻜㻜㻺㻳㻾㼑㼐㼑㼟㼕㼓㼚㻟㻜㻜㼄㼇㼙㼉㻻㻷11

Design Flow of Riser Cable (2)㻯㼍㼎㼘㼑 㼟㼠㼞㼍㼕㼚 㼒㼍㼠㼕㼓㼡㼑 㼜㼞㼛㼜㼑㼞㼠㼥㻿㼠㼞㼍㼕㼚 㼒㼍㼠㼕㼓㼡㼑 㼜㼞㼛㼜㼑㼞㼠㼥㻝㻜㻿㼠㼞㼑㼟㼟㼟 㼇㻑㼉㻿㼠㼍㼕㼚㼘㼑㼟㼟 㻿㼠㼑㼑㼘 㻲㼛㼕㼘㻸㼍㼙㼕㼚㼍㼠㼑㼐 㼀㼍㼜㼑㻲㼍㼠㼕㼓㼡㼑 㼍㼚㼍㼘㼥㼟㼕㼟㻯㼡㼙㼡㼘㼍㼠㼕㼢㼑㼒㼍㼠㼕㼓㼡㼑 㼒㼛㼞㼐㼑㼟㼕㼓㼚 㼘㼕㼒㼑㼠㼕㼙㼑㼃㼍㼢㼑 㼔㼑㼕㼓㼔㼠 㻒㼒㼞㼑㼝㼡㼑㼚㼏㼥㼟㼠㼍㼠㼕㼟㼠㼕㼏㼟㻺㻳㻾㼑㼐㼑㼟㼕㼓㼚㻝㻻㻷㻯㼛㼞㼞㼡㼓㼍㼠㼑㼐 㻿㼠㼍㼕㼚㼘㼑㼟㼟㻿㼠㼑㼑㼘 㻿㼔㼑㼍㼠㼔㻜㻚㻝㻝㻚㻱㻗㻜㻟㻱㻺㻰㻝㻚㻱㻗㻜㻠㻝㻚㻱㻗㻜㻡㻝㻚㻱㻗㻜㻢㻝㻚㻱㻗㻜㻣㻺㼡㼙㼎㼑㼞 㼛㼒 㻯㼥㼏㼘㼑㼟12

Design of 66kV Riser Cable㼃㼍㼠㼑㼞 㻮㼘㼛㼏㼗㼕㼚㼓 㻿㼠㼞㼡㼏㼠㼡㼞㼑 㼣㼕㼠㼔 㻯㼛㼞㼞㼡㼓㼍㼠㼑㼐㻿㼠㼍㼕㼚㼘㼑㼟㼟 㻿㼠㼑㼑㼘 㻿㼔㼑㼍㼠㼔㻯㼛㼚㼐㼡㼏㼠㼛㼞㻯㼛㼚㼐㼡㼏㼠㼛㼞 㼟㼏㼞㼑㼑㼚㼄㻸㻼㻱 㻵㼚㼟㼡㼘㼍㼠㼕㼛㼚㻵㼚㼟㼡㼘㼍㼠㼕㼛㼚 㼟㼏㼞㼑㼑㼚㻹㼑㼠㼍㼘㼘㼕㼏 㼟㼏㼞㼑㼑㼚㻹㼑㼠㼍㼘㼘㼕㼏 㻿㼔㼑㼍㼠㼔㻵㼚㼚㼑㼞 㼖㼍㼏㼗㼑㼠 㻔㻼㻱㻕㻲㼕㼘㼘㼑㼞㻮㼑㼐㼐㼕㼚㼓㻭㼞㼙㼛㼞㻻㼡㼠㼑㼞 㼖㼍㼏㼗㼑㼠 㻔㻼㻱㻕

Conductor

3 x 100 mm2XLPE Insulation

11 mm

Inner PE jacket

3.5 mmArmourGalvanized steel
wire (6.0 mm)

Outer PE jacket

6 mm

Outer diameter

175 mmWeight53 kg/m in air㻻㼜㼠㼕㼏㼍㼘 㼒㼕㼎㼑㼞 㼡㼚㼕㼠㻵㼚㼟㼠㼍㼘㼘㼑㼐 㼏㼍㼎㼘㼑 㼘㼑㼚㼓㼠㼔㻦 㻤㻢㻜㼙13

66kV Riser Cable㻢㻢㼗㼂 㻾㼕㼟㼑㼞 㻯㼍㼎㼘㼑22kV Riser Cable㼃㼍㼠㼑㼞 㻮㼘㼛㼏㼗㼕㼚㼓 㻿㼠㼞㼡㼏㼠㼡㼞㼑 㼣㼕㼠㼔 㻿㼠㼍㼕㼚㼘㼑㼟㼟 㻿㼠㼑㼑㼘 㻲㼛㼕㼘㻸㼍㼙㼕㼚㼍㼠㼑㼐 㼀㼍㼜㼑㻯㼛㼚㼐㼡㼏㼠㼛㼞㻯㼛㼚㼐㼡㼏㼠㼛㼞 㼟㼏㼞㼑㼑㼚㼄㻸㻼㻱 㻵㼚㼟㼡㼘㼍㼠㼕㼛㼚㻵㼚㼟㼡㼘㼍㼠㼕㼛㼚 㼟㼏㼞㼑㼑㼚

Conductor

3 x 150 mm2

XLPE Insulation

6 mm

Metallic sheath

Stainless steel
foil laminatedtape(0.6mm)

Inner PE jacket

3.5 mmArmourGalvanized steel
wire (6.0 mm)

Outer PE jacket

6 mm

Outer diameter

147 mmWeight43 kg/m in air

㻹㼑㼠㼍㼘㼘㼕㼏 㼟㼏㼞㼑㼑㼚㻿㼠㼍㼕㼚㼘㼑㼟㼟 㼒㼛㼕㼘㼘㼍㼙㼕㼚㼍㼠㼑㼐 㼠㼍㼜㼑㻵㼚㼚㼑㼞 㼖㼍㼏㼗㼑㼠 㻔㻼㻱㻕㻲㼕㼘㼘㼑㼞㻮㼑㼐㼐㼕㼚㼓㻭㼞㼙㼛㼞㻻㼡㼠㼑㼞 㼖㼍㼏㼗㼑㼠 㻔㻼㻱㻕㻻㼜㼠㼕㼏㼍㼘 㼒㼕㼎㼑㼞 㼡㼚㼕㼠㻵㼚㼟㼠㼍㼘㼘㼑㼐 㼏㼍㼎㼘㼑 㼘㼑㼚㼓㼠㼔㻦 㻞㻟㻠㻜㼙22kV Riser Cable㻞㻞㼗㼂 㻾㼕㼟㼑㼞 㻯㼍㼎㼘㼑Design of 66kV transition joint
between riser and submarine cable㻝㻣㻚㻡㼙㻣㼙㻣㻜㻜㼙㼙䃅㻮㼑㼚㼐 㻾㼑㼟㼠㼞㼕㼏㼠㼛㼞

Water Pressure
ResistanceTensile Strength on
Conductor Joint Sleeve

1.5MPaOKPower Cable splice
Fiber optic splice> 7kN㻾㼕㼓㼕㼐 㼖㼛㼕㼚㼠 㼣㼛㼞㼗㼑㼐 㼛㼚 㼠㼔㼑 㼘㼍㼥㼕㼚㼓 㼢㼑㼟㼟㼑㼘17

66kV transition joint
between riser and submarine cable㻢㻢㼗㼂 㼠㼞㼍㼚㼟㼕㼠㼕㼛㼚 㼖㼛㼕㼚㼠 㼛㼚 㼠㼔㼑 㼘㼍㼥㼕㼚㼓 㼢㼑㼟㼟㼑㼘Design of 66kV submarine cable㻯㼛㼚㼐㼡㼏㼠㼛㼞㻯㼛㼚㼐㼡㼏㼠㼛㼞 㼟㼏㼞㼑㼑㼚㼄㻸㻼㻱 㻵㼚㼟㼡㼘㼍㼠㼕㼛㼚㻵㼚㼟㼡㼘㼍㼠㼕㼛㼚 㼟㼏㼞㼑㼑㼚㻱㼤㼠㼞㼡㼐㼑㼐 㼘㼑㼍㼐㼍㼘㼘㼛㼥 㼟㼔㼑㼍㼠㼔㻲㼕㼘㼘㼑㼞㻮㼑㼐㼐㼕㼚㼓㻭㼞㼙㼛㼞㻿㼑㼞㼢㼕㼚㼓

Conductor

3 x 100 mm2

XLPE Insulation

11 mm

Metallic sheath

Extruded lead alloy(2 mm)

ArmourGalvanized steel
wire (6.0 mm)

Outer diameter

123 mmWeight32 kg/m in air㻻㼜㼠㼕㼏㼍㼘 㼒㼕㼎㼑㼞 㼡㼚㼕㼠19

66kV submarine cable㻢㻢㼗㼂 㼟㼡㼎㼙㼍㼞㼕㼚㼑 㼏㼍㼎㼘㼑Project Schedule
1st stage project completed¾ Cable production:~2013 Summer¾ Riser cable installation:~2013 August-September¾ System commissioning:
2013 October¾ 1st stage project in operation:2013 November~

21

Riser Cables Installation (1)㻸㼍㼥㼕㼚㼓 㼢㼑㼟㼟㼑㼘㻢㻢㼗㼂 㼞㼕㼟㼑㼞 㼘㼍㼥㼕㼚㼓 㼍㼠 㻿㻛㻿㻮㼑㼚㼐 㼟㼠㼕㼒㼒㼚㼑㼞㻯㼔㼕㼚㼑㼟㼑 㼒㼕㼚㼓㼑㼞㻯㼍㼎㼘㼑 㼠㼡㼞㼚 㼠㼍㼎㼘㼑㻾㻻㼂
22

Riser Cables Installation (2)㻞㻹㼃 㼃㼕㼚㼐 㼠㼡㼞㼎㼕㼚㼑㻞㻞㼗㼂 㼞㼕㼟㼑㼞 㼘㼍㼥㼕㼚㼓 㼍㼠 㻿㻛㻿㻲㼘㼛㼍㼠㼕㼚㼓 㻿㻛㻿㻞㻞㼗㼂 㼞㼕㼟㼑㼞 㼘㼍㼥㼕㼚㼓 㼍㼠 㼠㼡㼞㼎㼕㼚㼑㻞㻞㼗㼂 㼞㼕㼟㼑㼞 㼎㼑㼘㼛㼣 㼠㼡㼞㼎㼕㼚㼑23

Riser Cables Installation (3)㼀㼞㼍㼚㼟㼕㼠㼕㼛㼚 㼖㼛㼕㼚㼠 㼛㼚 㼠㼔㼑 㼢㼑㼟㼟㼑㼘㻶㼛㼕㼚㼠 㼘㼍㼥㼕㼚㼓㻶㼛㼕㼚㼠 㼕㼟 㼓㼛㼕㼚㼓 㼕㼚㼠㼛 㼟㼑㼍㻶㼛㼕㼚㼠 㼛㼚 㼠㼔㼑 㼟㼑㼍 㼎㼑㼐24Riser Cables Installation (4)¾ On-site test for final Inspection

66kV cables

DC 151.8kV x 10min. Passed

22kV cables

DC 57.5kV x 10min. Passed㻻㼚㻙㼟㼕㼠㼑 㼠㼑㼟㼠 㼒㼛㼞㻢㻢㼗㼂 㻯㼍㼎㼘㼑㻻㼚㻙㼟㼕㼠㼑 㼠㼑㼟㼠 㼒㼛㼞 㻞㻞㼗㼂 㻯㼍㼎㼘㼑25

2nd Stage Project Outline
㻞㻹㼃 㼀㼡㼞㼎㼕㼚㼑㻣㻹㼃㼡㼞㼎㼕㼚㼑㻙㻝㻲㼘㼛㼍㼠㼕㼚㼓 㻿㻛㻿㻝㼟㼠 㻿㼠㼍㼓㼑㻢㻢㼗㼂 㻾㼕㼟㼑㼞㻯㼍㼎㼘㼑㼀㼞㼍㼚㼟㼕㼠㼕㼛㼚 㼖㼛㼕㼚㼠㻢㻢㼗㼂 㻿㼡㼎㼙㼍㼞㼕㼚㼑㻯㼍㼎㼘㼑㻣㻹㼃㼀㼡㼞㼎㼕㼚㼑㻙㻞㻞㻞㼗㼂 㻾㼕㼟㼑㼞 㻯㼍㼎㼘㼑㻞㻞㼗㼂㻾㼕㼟㼑㼞㻯㼍㼎㼘㼑㻞㼚㼐 㻿㼠㼍㼓㼑26

㻿㼛㼡㼞㼏㼑 㻦㻲㼡㼗㼡㼟㼔㼕㼙㼍 㻻㼒㼒㼟㼔㼛㼞㼑 㼃㼕㼚㼐 㻲㼍㼞㼙 㻯㼛㼚㼟㼛㼞㼠㼕㼡㼙2nd Stage Project Schedule
2013

2014

2015

Cable
Manufacturing

Cable
Installation

Cable Jointon siteFinalInspection27

Thank you for your attention!
References: [1] Fujii, et. al.; “The Development of the Power Transmission System for
Fukushima FORWARD Project”, Furukawa Review 43, (March 2013)[2] Fukushima Offshore Wind Farm Consortium, Brochure on Fukushima
FORWARD ProjectThis research is carried out as a part of Fukushima floating
offshore wind farm demonstration project funded by theMinistry of Economy, Trade and Industry.
The authors wish to express their deepest gratitude to theconcerned parties for their assistance during this study. 28