Electric Power Supply in Tokyo Metropolitan Area March 19th 2015 Tokyo Electric Power Company
Topics
- TEPCO at a Glance - Smart Grid - Underground Substations
© 2015 Tokyo Electric Power Company, Inc All Rights Reserved
2
1．TEPCO at a Glance
© 2015 Tokyo Electric Power Company, Inc All Rights Reserved
3
1.1 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. ・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
TEPCO (FY 2013) Peak demand Service area Demand density Population in service area UG transmission line circuit length OH transmission line circuit length
© 2015 Tokyo Electric Power Company, Inc All Rights Reserved
64.3GW (July 2001) 50.9GW (Aug 2013) 39,542km2 1288kw/km2 45 million 12,073km 28,247km
4
1.2 Maximum Power Demand of TEPCO Recorded in July 2001 GW 70
6 1 .4 7 6 4 .3 6 1 .5 5 8 .0 6 6 3 .2 5 9 .2 5 6 0 .8 9 5 9 .9 9 5 8 .6 5 6 0 .1 2 5 9 . 2 4 5 7 . 3 6 5 7 .9 6 5 4 .5 5 0 .7 8 5 1 .9 5 0 .2 4 9 .6 6
60 50
4 3 .7
40
3 6 .7 8 2 8 .3 1
30
2 3 .0 4
20
1 5 .6 9 8 .4 2 4 .7 6 2 . 5 7 1 .6 7
10
19
5 19 1 5 19 5 6 19 0 65 19 7 19 0 7 19 5 8 19 0 8 18 5 8 19 9 9 19 1 9 19 3 9 19 5 97 19 9 20 9 0 20 0 0 20 1 0 20 2 0 20 3 0 20 4 0 20 5 0 20 6 07 20 0 20 8 0 20 9 1 20 0 1 20 1 12
0
© 2015 Tokyo Electric Power Company, Inc All Rights Reserved
5
SAIDI
Duration of outages per household (min.)
100
2 .5
ＳＡＩＦＩ
90
ＳＡＩＤＩ
80
2 .0
1966 SAIFI: 2.13 times SAIDI: 93 min
70 60
1 .5
50 40
2012 SAIFI: 0.07 times SAIDI: 5 min
typhoon
30
typhoon, heavy snow
20
1 .0 Typhoon Tornado
0 .5
10 0
SAIFI
2010 The Great East Japan Earthquake SAIDI: 153 min.
Frequency of outages per household (times)
1.3 Power Supply Reliability of TEPCO
0 .0 1966
1971
1976
1981
1986
1991
1996
2001
2006
© 2015 Tokyo Electric Power Company, Inc All Rights Reserved
2011
(FY)
6
1.4 T&D System Loss of TEPCO 30 25
15 10
5% and below
5 0
FY 19 52 19 55 19 58 19 61 19 64 19 67 19 70 19 73 19 76 19 79 19 82 19 85 19 88 19 91 19 94 19 97 20 00 20 03 20 06 20 09 20 12
(%)
20
© 2015 Tokyo Electric Power Company, Inc All Rights Reserved
7
2. Smart Grid in TEPCO
© 2015 Tokyo Electric Power Company, Inc All Rights Reserved
8
2.1 Smart Grid in TEPCO 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. Wide area power system operation
Power Line ICT
Solar
EV Charger
Transmission System
Battery Modernization of Distribution
Wind
Smart Buildings
EMS
Distribution System
Central dispatch center Substation
Control center
ICT
Sensor built-in switch
Nuclear 原子力
ICT
Thermal Hydro
Smart Meter service Diesel EV
Integration of renewable and distributed resources
Mega solar Smart House
EMS © 2015 Tokyo Electric Power Company, Inc All Rights Reserved
Isolated Micro Grid
9
2.2 Telecommunication System 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. Telecommunication System of Distribution Network (Optical Fiber)
Telecommunication System of Smart Meter Wireless Mesh
Mesh created with meters at low cost. Suitable for relatively highdensity areas.
PLC
Cellular Network
Suitable for building complexes where radio signals are likely to be blocked.
Concentrators
Cellular services such as 3G and LTE. Suitable for low density areas.
High-Reliability Telecom System using Optical Fiber
Concentrator
Optical Multi-hop System
Cellular Base Station
Concentrato Smartrs Meters
Distribution Automation System
Substation
Optical Fiber
Substation MV line
Smart Meter Smart Meters
Smart Meters Electrical Room
Wireless Mesh Wireless Mesh can collect a lot of data at low cost
© 2015 Tokyo Electric Power Company, Inc All Rights Reserved
10
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.
SVR, etc DG
★ Remote setting for control devices
Renewable Energy
★ Prompt system impact study for interconnection
Detail information Substation
Smart meter
Measurement Data (V, I, etc)
Monitoring data ★ Switching based on phase angle measurement
★ Fault point detection by monitoring V0, I0 東京電力
:Sensor built-in switch :Distribution Line :Communication line
・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 © 2015 Tokyo Electric Power Company, Inc All Rights Reserved
11
3. Underground Substations in TEPCO
© 2015 Tokyo Electric Power Company, Inc All Rights Reserved
12
3.1 Power Network System of TEPCO
500kV UG
TEPCO-Wide
275kV UG
13%
Central Area
86%
500kV OH 275kV OH
Total
1,582
73
UGSS
204
64
RATIOS
13%
86%
Totally Underground Area
© 2015 Tokyo Electric Power Company, Inc All Rights Reserved
13
3.2 Optimized Footprint Acquisition for Urban Areas Underground Substation
Conventional 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
© 2015 Tokyo Electric Power Company, Inc All Rights Reserved
14
3.3 Gas Insulated Equipment TEPCO has developed underground substations utilizing its design/operation know-how and manufacturers’ technologies/techniques.
275kV 300MVA GIT
Layout of Underground Substation 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
275kV GIS © 2015 Tokyo Electric Power Company, Inc All Rights Reserved
15
3.4 Damage Protection from Natural Disasters Based on experience of floods in the Tokyo bay area, inundation measures are considered at the design level.
Flood Hazard Map (Minato-City, Tokyo)
Flood damage in Oct. 2013
Submerged substation ‘Interior protected by TEPCO’s flood prevention system’ © 2015 Tokyo Electric Power Company, Inc All Rights Reserved
Water shield Machine Hatch
16
3.5 Damage Protection from Vandalism For security reasons, entrances to the Underground Substation are camouflaged as ordinary building structures.
© 2015 Tokyo Electric Power Company, Inc All Rights Reserved
17
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] © 2015 Tokyo Electric Power Company, Inc All Rights Reserved
18
Thank you for your attention!
© 2015 Tokyo Electric Power Company, Inc All Rights Reserved
19
