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380 VDC Distribution System
by NTT FACILITIES
Keiichi Hirose, Ph. D.
Data center business HQ,
NTT FACILITIES, INC.
March 27, 2017
APEC, Tampa, FL
Electricity Consumption by ICT Services
©2017 NTT FACILITIES, INC. All rights reserved.
Source: SMART 2020: Enabling the low carbon economy in the
information age
1963 B kWh in 2020
Increasing Load Density for ICT services
©2017 NTT FACILITIES, INC. All rights reserved.
More than100 times
Telecom switch
Server system
380VDC Power Supply – Advantages,
Smaller Wiring
©2017 NTT FACILITIES, INC. All rights reserved.
48 Vdc
325 mm2
20 wires
Benefits
• Increase cabling space
• Decrease material cost
• Save metal resource
• Reduce construction work
Rectifier
VRLA
Battery
(e.g.) Power cable for 100 kW system
380 Vdc
200 mm2
2 wires
DC Power Supply – Advantages,
Higher Reliability
©2017 NTT FACILITIES, INC. All rights reserved.
• Reduced conversion loss (heat)
– Reduced electricity, CO2 reduction
– Smaller air conditioning units
– Fewer component failures
•Fewer components in facility/system
– Smaller space / Reduced weight
– Improved reliability (Smaller failure rate)Reference: H. Ikebe, N. Yamashita, R. Nishii;
GREEN ENERGY FOR TELECOMMUNICATIONS;
Intelec 2007
Year<Field data>
AC UPS: About 10,000 units
DC UPS: About 23,000 units
AC system
DC system
No failureNo failure
Un
ava
ila
bilit
y
Comparison of AC, 48 VDC,
and 380 VDC Power Systems
©2017 NTT FACILITIES, INC. All rights reserved.
• Reduce in voltage
drop losses
• Wire size x 1/10
• Efficiency +20%
• Reliability x10
AC
Battery
CPUDC
DC system (48 Vdc) for TelecomDC system (48 Vdc) for Telecom
DC DC48 Vdc
Battery
IT system
CPU
AC UPS
AC system for ServerAC system for Server
ACDC DC AC
Telecom switchDC UPS
AC
Battery
CPUDC DC DC380 Vdc
ICT equipmentNew DC UPS
380 VDC system for ICT system380 VDC system for ICT system
•Easy integration with
renewable energy
resources
AC ACDC
FAQ 1: DC Voltage Converted from AC Source
©2017 NTT FACILITIES, INC. All rights reserved.
Japan
North America
UK
Europe
AC power source
FAQ 2: Safety issue
©2017 NTT FACILITIES, INC. All rights reserved.
• 380 VDC power system shall be safer than existing AC and 48 VDC systems.
• It’s very important to overcome mental burden for IT & NW operators or
un-skilled engineers as well as electrical engineers, in ICT facilities.
If terminals are always Energized…
Electrical Shock Undesired or unintended electric DC arcing
If someone pulls the plug
from socket (outlet) still load-
on with higher currents…
For Safer Operation (our solution)
©2017 NTT FACILITIES, INC. All rights reserved.
Engine-gen set
Transformer
200 Vac
380 Vdc
・・・
ICT Rack
380 VDC
Rectifier,
converter
PDU
Batteries
Plug &
Socket-outlets
380 Vdc
380 Vdc
Connector
For cables
Safety Devices for 380 VDC
developed by NTT-F
©2017 NTT FACILITIES, INC. All rights reserved.
Plug
Socket-outlets
for ICT equipmentConnector for big cables
•UL 2695 Listed
•IEC TS62735-1
380V DC Power Demos by NTT-F
©2017 NTT FACILITIES, INC. All rights reserved.
Sapporo
OsakaFukuoka
NTT Musashino lab.
NTT-FNTT Data Corp.
NTT EAST
NTT Atsugi lab.
NTT-F Module
data center in wind farmAomori
Tsukuba
NEDO Green IT PJ
NTT-F operation center
Tokyo
NEDO Sendai PJ
380 VDC Microgrid
In university campus
Sendai
Aichi
380 VDC Promotion Roadmap in NTT Group
©2017 NTT FACILITIES, INC. All rights reserved.
Un
ify p
ow
er
sup
ply
in
fra
stru
ctu
re t
o H
VD
C
1st step
~2030~2030~20302016 2018 202020152014■Tokyo Olympics & Paralympics■Press release,
Technical Requirement
Guideline regarding establishing HVDC
■Increase HVDC-supported ICT
equipment
2nd step Final step
As of today
300 systems
2020
Goal:1,000 bldgs
Now
Acc
ele
rati
on
of
HV
DC
in
sta
lla
tio
n
Next Generation Network systems
Development of ICT equipment
conversion to HVDC-supported type
Construction
with HVDC +
migration
equipment
• NTT Group accelerates 380VDC systems for telecom buildings
• Reduction in energy consumption and energy cost is achieved through our strategy
* ICT equipment, which receives HVDC directly, does not require
migration equipment
Nu
mb
er
of
de
plo
ym
en
t
Achieve both energy
and energy cost reduction
History of 380Vdc Demo Projects
©2017 NTT FACILITIES, INC. All rights reserved.
NEDO
SENDAI microgrid
Project
NEDO
Green IT Project
FS
Market
research &
survey
in North
America
2005 2012 2013 2014 2015 20162007 2008
Market research & survey
in North America
NEDO: New Energy and Industrial Technology
Development Organization
FS: Feasibility Study
48 Vdc 300 Vdc
300 Vdc 380 Vdc
Sendai, Japan
Tsukuba, Japan
NEDO
HVDC
Project
Austin, TX
University of Texas at Austin, TACC
©2017 NTT FACILITIES, INC. All rights reserved.
The university of Texas (UT) at Austin:
a public research university and the flagship
institution of the University of Texas System.
Founded in 1881
UT Austin is considered to be a "Public Ivy" .
What is TACC?
The Texas Advanced Computing Center (TACC) designs
and operates some of the world's most powerful
computing resources.
The center's mission is to enable discoveries that
advance science and society through the application
of advanced computing technologies.
380 VDC Power System Configuration
©2017 NTT FACILITIES, INC. All rights reserved.
• 300kW 380VDC power supply system (N+1 system)
• 200kW solar power system directly connected to 380VDC power supply system
• 380VDC-enabled loads: Supercomputer, blade server, air handling units, lighting
• Lithium-ion battery as full-load backup for 20 minutes
HVDCRF modules
DC Distribution boardSuper
computer
Lithium Ion Battery
Power Conditioner for PV
panels
380 VDC Power System Layout in TACC
©2017 NTT FACILITIES, INC. All rights reserved.
Equipment for 380 VDC demo
©2017 NTT FACILITIES, INC. All rights reserved.
PV system Air conditioner
LED lightingNEC Blade servers Digital Signage
HPE Super-computer
Conclusions
• NTT FACILITIES has developed and deployed
380 VDC power system to meet energy issues
in ICT industry.
• NTT Group officially announced the roadmap
of 380 VDC to replace existing AC and 48 VDC
systems.
• We would like to grow your businesses with
our experience.
©2017 NTT FACILITIES, INC. All rights reserved.
Thank you for your attention!
Questions / Comments?
Keiichi Hirose, [email protected]
NTT FACILITIES, INC.