Latest trends of High Voltage Direct Current (HVDC) …...HVDC AC DC12V Mother board CPU Memory HDD Server（DC12V） Key technology : Middle point ground Key technology : Bus bar

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Green Solution Business Unit

Environmental Technology Division

NTT DATA INTELLILINK Corporation

Latest trends of High Voltage Direct Current (HVDC) system

2016.11.9

2 Copyright © 2016 NTT DATA INTELLILINK Corporation

Power Supply

ＤＣＡＣ

< Pic.3 : Inside of LCD TV >

Power Supply

ＤＣＡＣ

< Pic.2 : Note PC >

Power Supply

ＤＣＡＣ

< Pic.1 : Server >

Most electric appliances have a power supply converting AC to DC.

In principle, we all can't convert any energy without loss.


http://www.google.co.jp/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjP8Nmn-ZDQAhWHU7wKHWVwDUkQjRwIBw&url=http://jp.wsj.com/articles/SB12785023003277603623104580156810637890530&psig=AFQjCNGV9WryXM2Rn5MK8Ox541VYft74Sw&ust=1478412345366069


Google Datacenter （Finland Hamina）

Source：TechRepublic2016/11/3


Facebook Datacenter （Sweden Lulea）







Open Compute Project（OCP）, recommended by Facebook


Google Datacenter （Iowa）



Facebook Datacenter （North Carolina）

Fuel cell & Solar power 20ＭＷ


「Green Datacenter」

in Switzerland

・2MW：AC ・1MW：HVDC


Pezy Computing Co.Ltd. ・1024Core 「PEZY-SC」 256pieces ・3.0TFLOPS ・Liquid cooling


From Sakura Internet Evaluation Reports

Ishikari

( AC )

Ishikari

( HVDC )

Previous Data

Center

Cooling

with

Outside

Air

HVDC

Reduction Rate

ITE

Air Conditioning

System

Others

19. Case study

Power Consumption

Sakura Internet had applied the outside air cooling system that reduces power consumption by 40% compared to the previous data center.

The test-bed technologies have already demonstrated energy savings of more than 10%.

Case study Service In ! / Sakura Internet Ishikari DC


■ System: DC12V Type HVDC Power Supply System （Product: FRESH HVDC® and XECHNO® Power） ■ Location: Ishikari DC of Sakura Internet ■ Range: 19Racks 140kW

Service In ! / Sakura Internet Ishikari DC


DC Solar Electricity Transmitted to Data

Center Using Private Power Line （2015/8/10 12:34） SAKURA Internet Inc. announced that they have built a 200kW solar power station in Ishikari City, Hokkaido, Japan, and started to transmit electricity to its data center.

In March 2013, SAKURA Internet introduced HVDC+DC12V system to Ishikari data center. The DC power generated at the solar power station is transmitted over a private power line without being converted to AC, directly powering DC12V servers.

Business Case: Integrating solar power with HVDC (SAKURA Internet Inc.)

HVDC 電力会社（交流）

優先① 380V

非常電池

太陽光発電所

サーバ

優先② 340V

優先③ 264V

http://internet.watch.impress.co.jp/img/iw/docs/715/881/html/sakura02.png.html

http://internet.watch.impress.co.jp/docs/news/20150810_715881.html


Achieved 3 important performance factors for practical superconducting transmission

Successful Superconducting DC Power Transmission over a distance of 500m (Updated: 2015/08/07 12:00)

Business Case: Superconducting transmission with HVDC (SAKURA Internet Inc.)

Super Conductors Cable

Solar Power

Project Outline

2015 MARCH

http://internet.watch.impress.co.jp/img/iw/docs/715/635/html/sakura01.jpg.html


Benefit１

Energy-saving effect High reliability

Safety The future technology

●Total Efficiency – higher than 90% with reducing the number of conversion!

●High efficiency with real loading factor, unlike UPS

●Intensive PS system with central power

supply unit in server rack ●Reduction of electricity charge

●Non-stop maintenance and expansion through n+1

redundancy! ●Seamless connection to battery during power outage!

●Less AC conversion!

●Eliminating PS form ITE, long-lasting, highly-reliable!

Fanless, liquid-capacitor less!

Benefit2

Benefit3

●Solving high voltage-current problems ! ・Arc suppression circuit ・Middle point ground ・DC12V

●Solar power ●LED Illumination ●Fuel cell ●Cooling system with outside air ●Superconductors etc…

What HVDC DC12V type can do for You

HVDC DC12V can help you succeed in the future with greater productivity and lower costs.

Benefit4


HVDC DC12V Power Supply System reduces AC/DC conversions between commercial power and ITE. Power loss is reduced by approximately 10-20%.

Energy-saving effect: Energy reduction

CPU/MEMORY/HDD

CPU/MEMORY/HDD


0.0 %

2.0 %

4.0 %

6.0 %

8.0 %

10.0 %

12.0 %

14.0 %

16.0 %

18.0 %

20.0 %

60.0 %

65.0 %

70.0 %

75.0 %

80.0 %

85.0 %

90.0 %

95.0 %

12.5% 25.0% 37.5% 50.0% 62.5% 75.0% 87.5% 100.0%

差異効率

負荷率 ( % )

効率比較

XECHNO+Fresh 総合効率

AC方式総合効率

XECHNO+Fresh 総合効率


差異 ( % )

XECHNO+Fresh


差異 ( % )

9.0%

18.0%

8.4%

Energy-saving effect: Total efficiency of HVDC

comparative chart of efficiency Eff[%]

Load Factor[%]

difference

■ XECHNO+Fresh Total Efficiency ■ AC Type Total Efficiency ■ Difference(%) XECHNO+Fresh Total Efficiency AC Type Total Efficiency Difference(%)


Reliability: fewer failure points

ＡＣＤＣＡＣＡＣ

ＩｎＤＣ

Battery

Switch

UPS

ＤＣＡＣ Mother

Board

AC ITE ( Server )

ＤＣＡＣ

ＤＣＡＣＡＣ

Ｉｎ

Battery HVDC

Mother

Board

DC12V ITE ( Server )

Path-

Through ＤＣＤＣ

Non-Voltage Flicker,

Non-Stop, Non-

Interruptible Power

through N+1 Redundant

Operation

Failure

Point

Natural flow like a River

Failure

Point

Failure

Point

Failure

Point

Failure

Point

Non-Voltage Flicker,

Non-Stop, Non-

Interruptible Power

through N+1 Redundant

Operation

Simpler architecture = less component count and failure points.

HVDC + DC12V


Safety

Multiple safety guard ！ Server

rack

Battery

PS rack

DC AC ～

PDU

HVDC

AC DC12V Mother board

CPU Memory HDD

Server（DC12V）

Key technology : Middle point ground Key technology : Bus bar

DC HVDC

DC340V DC340V

Key technology :

Arc suppression circuit

The current is limited within safety current for human

through high resistors of 47KΩ.

Dangerousness by

the high voltage

had been pointed

out. But ,,,

W/O Suppression Circuit W/ Suppression Circuit

Resolved the arc discharge issue at the time of switch-on/off and disconnection.

Central Redundant Power Supply


Solar Power + HVDC Beyond The Legacy

For effective power generation, the solar battery needs the power conditioner that is controlling the operating point ,or rather the " MPPT ".

It's true.

In the following illustration, battery and solar panels are prioritized by their voltage. DC allows this simple architecture by applying diodes which prevent reverse current.

However, this theory will become legendary. NTT Data Intellilink had developed a simple and outstanding idea to establish their own legacy.

PATPEND


NEDO Demonstration Project Aims for 15% Energy Saving with a High-Voltage Direct Current (HVDC) Feeding System

－Data Center Energy Conservation Demonstration Launches in Texas－


MITSUBISHI ELECTRIC

SONY


Society of the clean energy by HVDC

Solar power Window power

Fuel cell

Data-center

consecutive system Battery


Documents

Latest trends of High Voltage Direct Current (HVDC) …...HVDC AC DC12V Mother board CPU Memory HDD Server（DC12V） Key technology : Middle point ground Key technology : Bus bar