Electric Power Supply in Tokyo Metropolitan...

Electric Power Supply in Tokyo

Metropolitan Area

March 19th 2015Tokyo Electric Power Company

Topics

© 2015 Tokyo Electric Power Company, Inc All Rights Reserved 2

- TEPCO at a Glance

- Smart Grid

- Underground Substations

1．TEPCO at a Glance


・In Japan, 10 regional, and privately owned and managed, General Electricity Utilities

have the responsibility of supplying electricity to each region.

1.1 TEPCO at a Glance

TEPCO (FY 2013)

Peak demand

64.3GW(July 2001)

50.9GW(Aug 2013)

Service area 39,542km2

Demand density 1288kw/km2

Population in service area

45 million

UG transmission line circuit length

12,073km

OH transmission line circuit length

28,247km


・Main Service Area: Tokyo metropolitan area・TEPCO covers:- 10% of Japan’s land area (39,512km2)- 35% of Japan’s population (45 million people)- 31% of Japan’s electricity sales

1.2 Maximum Power Demand of TEPCO

1.672.574.76

8.42

15.69

23.04

28.31

36.78

43.7

51.950.2

64.3

54.5

59.99

49.66

58.06

59.24 57.36 60.1258.6559.25

57.96

60.89

61.4761.563.2

50.78

0

10

20

30

40

50

60

70

1951

1955

1960

1965

1970

1975

1980

1985

1889

1991

1993

1995

1997

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

5© 2015 Tokyo Electric Power Company, Inc All Rights Reserved

Recorded in July 2001

GW

0

1 0

2 0

3 0

4 0

5 0

6 0

7 0

8 0

9 0

1 0 0

1 9 6 6 1 9 7 1 1 9 7 6 1 9 8 1 1 9 8 6 1 9 9 1 1 9 9 6 2 0 0 1 2 0 0 6 2 0 1 1

0 .0

0 .5

1 .0

1 .5

2 .0

2 .5

ＳＡＩＦＩ

ＳＡＩＤＩ

2010

The Great East Japan

Earthquake

SAIDI: 153 min.

typhoon

typhoon,

heavy snow

SA

IDI

Du

rati

on

of

ou

tag

es p

er h

ou

seh

old

(m

in.)

SA

IFI

Fre

qu

ency

of

ou

tag

es p

er h

ou

seh

old

(ti

mes

)

1966

SAIFI: 2.13 times

SAIDI: 93 min

2012

SAIFI: 0.07 times

SAIDI: 5 min

(FY)

Typhoon

Tornado

1.3 Power Supply Reliability of TEPCO


1.4 T&D System Loss of TEPCO


5% and below

0

5

10

15

20

25

30

FY195219551958196119641967197019731976197919821985198819911994199720002003200620092012

(%)

2. Smart Grid in TEPCO


Central dispatch

center

Wind

ICT

Wide area power

system operation

原子力

Smart Buildings

Mega solarSmart House

EV Charger

ICT

Distribution System

Power Line

ICT

Isolated Micro Grid

Solar

EV

ThermalHydro

Nuclear

Integration of renewable and

distributed resources

Modernization of Distribution

Smart Meter service

Substation

Battery

Transmission

System

Sensor built-in switchControl center

EMS

EMS

Diesel

TEPCO plans to deploy 27 million smart meters by FY 2020. The purpose of this plan is the

improvement of energy efficiency and the power quality of TEPCO’s service territory.

2.1 Smart Grid in TEPCO


Wireless Mesh PLC Cellular Network

Mesh created with meters at low cost. Suitable for relatively high-density areas.

Suitable for building complexes where radio signals are likely to be blocked.

Cellular services such as 3G and LTE. Suitable for low density areas.

Telecommunication System of Smart Meter

2.2 Telecommunication System

Telecommunication System of

Distribution Network (Optical Fiber)


A highly reliable Optical Fiber Network will be employed in the trunk line of the smart grid. A

combination of various telecommunication technologies will be considered for the last mile from

the viewpoint of investment efficiency.

Concentrators

Smart Meters

MV lineSubstation

Concentrato

rsSmart Meters

Electrical

Room

Smart Meters

Cellular

Base Station

Substation

Concentrator

High-Reliability Telecom System using Optical Fiber

Wireless Mesh

Distribution Automation

System

Smart Meter

Wireless Mesh can collect a lot of data at

low cost

Optical Fiber

OpticalMulti-hop

System

11

:Communication line

★ Remote setting for

control devices

東京電力

:Sensor built-in switch

Monitoring data

Measurement

Data (V, I, etc)

Detail information

<Office>DG

・Securing of power quality using measurement data (V, I) for Renewable Energy integration study

・Quick fault detection and prompt restoration to prevent faults

・Improvement of efficiency using remote control

Substation

SVR, etc

Renewable Energy

Smart meter

:Distribution Line

★ Prompt system impact

study for

interconnection

★ Fault point detection by

monitoring V0, I0

★ Switching based on

phase angle

measurement

2.3 Modernization of Distribution Network

Utilizing more detailed information, such as accurate voltage and current of the distribution

network, TEPCO will maintain greater levels of power quality and supply reliability.

© 2015 Tokyo Electric Power Company, Inc All Rights Reserved

3. Underground Substations

in TEPCO


3.1 Power Network System of TEPCO

Totally

Underground Area


500kV UG

275kV UG

500kV OH

275kV OH

500kV UG

275kV UG

500kV OH

275kV OH

500kV UG

275kV UG

500kV OH

275kV OH

13%13% 86%86%

TEPCO-Wide Central Area

Total

UGSS

RATIOS

1,582

204

13%

73

64

86%

Conventional Substation

3.2 Optimized Footprint Acquisition for Urban Areas

Underground Substation

Footprint 30,000m2

Voltage level 500kV

Designed Capacity 6,480MVA

*4 underground stories

Footprint 325,000m2

Voltage level 500kV

Designed Capacity 6,650MVA

Same capacity can be equipped in 1/11 of the land

Additional income expected from building business in upper space


3.3 Gas Insulated Equipment

275kV 300MVA GIT

275kV GIS

On the assumption that both GIS & GIT can be installed

in the same room, it is possible to cut the number of

rooms and reduce the excavation cost

Layout of Underground Substation


TEPCO has developed underground substations utilizing its design/operation know-how and

manufacturers’ technologies/techniques.

3.4 Damage Protection from Natural Disasters

Flood Hazard Map(Minato-City, Tokyo)

Based on experience of floods in the Tokyo bay area, inundation measures are considered at the

design level.

Flood damage in Oct. 2013

Submerged substation‘Interior protected by TEPCO’s flood

prevention system’

Water shield Machine

Hatch


3.5 Damage Protection from Vandalism

For security reasons, entrances to the Underground Substation are camouflaged as ordinary

building structures.


Summary

Several decades ago, Japanese electrical utilities were faced with

unacceptable T&D loss and rapid demand increase. These issues

were not easily solved, but Japanese electrical utilities overcame

the challenges one by one. The technologies and knowledge

which have been accumulated through the efforts of Japan's

power industry must surely be useful to Brazilian electrical

utilities.

Contact: Takayuki Shibata

Manager, Tokyo Electric Power Co.

[email protected]


Thank you for your attention!


Electric Power Supply in Tokyo Metropolitan...

Documents

Transcript of Electric Power Supply in Tokyo Metropolitan...