Special Feature1

Laying the Foundation
for the Future ofRenewable Energy
Fukushima Offshore Wind Farm

Challenge to offshore wind power generation

Major projects the Furukawa Electric in involved in・METI Fukushima Restoration Floating Offshore Wind Farm
Demonstration Research Project・N EDO Kitakyushu bottom-fixed Offshore Wind Power

8000

Floating offshore wind power
Bottom-fixed offshore wind power
Onshore wind power
Results

7000
6000
5000
4000

Expected expansion
of offshore windpower generation
implementation

3000
2000
1000
02000
2002
2004
2006
2008
20
1020
1220
1420
1620
18202020222024202620282030203220342036203820402042204420462048
2050

Demonstration Experiment

Cumulative amount implemented (10,000 kW)

Wind power generation is well-known as a clean source of energy that requires no fuel.
Unfortunately, it is difficult in Japan to secure enough flat land for wind turbines, and thus
little progress has been made. So stable wind power can be obtained even than land,
ensure the location is also easy, offshore wind power generation has been attracting
attention.
Furukawa Electric Group was one of the first to focus on the potential of offshore wind
power generation, and it has already starting working toward realizing this promisingtechnology.

Proud participants in the Next Generation
Offshore DC Power Transmission SystemDevelopment Project
In July 2015, Furukawa Electric was selected as a planned
contractor for NEDO's “Next Generation Offshore DC Power
Transmission System Development Project.” Furukawa
Electric and VISCAS Corporation will be responsible fordeveloping the DC undersea cable systems for offshore
multi-terminal DC power transmission systems that arecompatible with offshore wind power (see figure on the right).
A major issue standing in the way of implementation is how
to efficiently transmit power from offshore power plants
located far away from large-scale demand areas. Furukawa
Electric Group will establish the foundational technologies
needed to accelerate the expansion and implementation ofoffshore power systems, making full use of the cabledevelopment technologies it has built up over the years.
Multi-terminal DC power transmission system
Power transmission system which collects powers from multiple wind farms,
converts to transmission-efficient DC and transmits to multiple onshore
substations.

8FURUKAWA ELECTRIC GROUP SUSTAINABILITY REPORT 2016

Wind power generation implementation scenario in Japan(source: JWPA)

Offshore wind farm

Offshore wind farm
Offshore wind farm

ACACACOffshore
substation

DC powertransmission
Offshore
substation

DC powertransmission

Onshore substation

DC powertransmission

To demand areas
To demand areas

Onshore substation

Develop next generation

power storage system

Due to the unstable nature of renewable energy, technologies that can store excess power and then restore power when neededfor supply are becoming increasingly important in order to supply stable power from said energy sources. Furukawa Electric Groupis also focused on developing next generation power storage systems that can store large amounts of power.

Proud participants in NEDO's "Safe & Low-cost Large-scale Power Storage System TechnologyDevelopment" project
Flywheel electricity storage systems store power as kinetic energy by rotating a large disk (called a flywheel) with a motor.
Furukawa Electric has successfully lifted and rotated a 4 ton flywheel—contactlessly—by developing an superconducting magnetic
bearing that combines a high temperature superconducting coil and high temperature superconducting bulk body. The completed
demonstration equipment has an output of 300 kW and a storage capacity of 100 kWh—making it the world's largest flywheel
power generation system.

Commercial power system

Unstable sunlight

Stable power supply

Unstable power

Gridconnection
equipment

Flywheel electricity
storage system

Power stored and supplied
according to fluctuation in sunlight

Promote hydroelectric power generation
For over 100 years, the Furukawa Group has been involved in a project to generatehydroelectric power that takes advantage of the abundant and stable supply of water fromNikko's Lake Chuzenji and the steep terrain of the region. Most of the power supplied to theregion is generated by the hydroelectric power generation site still located there.

Hydroelectric plant upgrade completed
Furukawa Nikko Power Generation Inc. (Nikko, Tochigi Prefecture)—a member of Furukawa
Electric Group—finished upgrading its Uwanoshiro Power Plant and began operating thegenerator in October 2015. The plant offers a total power generation capacity of 19,200 kW(normal output) or 30,110 kW (approved maximum output). Any power in excess of that suppliedto Furukawa Electric Group is provided to other power companies under the renewable energy
Feed-In Tariff (FIT) Program. Equipment at the Setoyama Power Plant has already been approved
powerforCommercial
FIT and the plantis to system
begin supplying energy to power companies in January 2017.

Uwanoshiro Power Plant

Overview of Furukawa Nikko Power Generation Inc.
hydroelectric plants in Nikko region

Mt. Nantai
Kegon Falls
Lake Chuzenji

UmamichiPowerPlant
Setoyama
PowerPlant

Supply of electricity
Supply of electricity

Supply of electricity

HosooPowerPlant

FurukawaPrecision
EngineeringFurukawaElectric,
Nikko Works

Furukawa Precision
Engineering,
Kiyotaki Plant
UACJ Nikko
Works

Furukawa Co.,
Ashio Works

Supply of electricity

Power Companies

Supply of electricity
Via FIT Program

Uwanoshiro
PowerPlant

FURUKAWA ELECTRIC GROUP SUSTAINABILITY REPORT 20169