380 vdc distribution system by ntt facilities - epsma.org (1).pdf · • it’s very important to...

380 VDC Distribution System

by NTT FACILITIES

Keiichi Hirose, Ph. D.

Data center business HQ,

NTT FACILITIES, INC.

March 27, 2017

APEC, Tampa, FL

NTT Position in the World

©2017 NTT FACILITIES, INC. All rights reserved.

Electricity Consumption by ICT Services


Source: SMART 2020: Enabling the low carbon economy in the

information age

1963 B kWh in 2020

Increasing Load Density for ICT services


More than100 times

Telecom switch

Server system

380VDC Power Supply – Advantages,

Smaller Wiring


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


• 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


• 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


Japan

North America

UK

Europe

AC power source

FAQ 2: Safety issue


• 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)


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


Plug

Socket-outlets

for ICT equipmentConnector for big cables

•UL 2695 Listed

•IEC TS62735-1

380V DC Power Demos by NTT-F


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


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

New Domo in Austin, TX


History of 380Vdc Demo Projects


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


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


• 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


Equipment for 380 VDC demo


PV system Air conditioner

LED lightingNEC Blade servers Digital Signage

HPE Super-computer

200 kW PV Panels in Parking Lot


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.


Thank you for your attention!

Questions / Comments?

Keiichi Hirose, [email protected]

NTT FACILITIES, INC.

380 vdc distribution system by ntt facilities - epsma.org (1).pdf · • it’s very important to...

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