0. TEPCO; Overview and Challenges
Takashi HAYASHI
Tokyo Electric Power Company
Oct.24，2005

1. Contents Overview and latest topics in TEPCO
Current status and experiences of Japan’s Liberalization

2. Overview and Latest Topics

3. (Based on electric service contracts closed as of March 31,2005 )
Company Highlight 2004FY
Customers
27,740,000
(Based on electric service contracts closed as of March 31,2005 )
Electricity Sales
286,741 GWh
Maximum Demand
64,300 MW
(July 24,2001)
Power Generation Capacity
Total:
62,825MW
Hydro:
8,521MW
Thermal:
36,995MW
Nuclear:
17,308MW
Wind:
1MW
Number of Employees
38,510
(as of March 31,2005)

4. Overall Transmission Network in TEPCO
UHV - designed
The Sea of Japan
9GW
9GW
Large Power Flow
Large Power Flow
11GW
6GW
3GW
5GW
Pacific Ocean
Center of Tokyo 50
100km

5. UHV Transmission Technology

6. UHV Substation Equipment Test Site

7. Latest Topics
Construction of the Bulk Power System Operation Center in Tokyo suburb area, which has substitutive function for the Central Load Dispatching Center as a risk management for disaster

8. 2. Current Status and Experiences of Japan’s Liberalization

9. Power Systems in Japan
AC interconnection(500kV)
AC interconnection(154kV～275kV)
DC interconnection
Back-to-Back Frequency Converter
AC-DC Converter
187kV Donan line
Hokkaido
5 GW
Hokkaido-Honshu
HVDC 600MW
Shin-Shinano
F.C. 600MW
275kV Hokubu Line
Tohoku
15GW
-Distance between Kyushu- Hokkaido is about 2000 km -Utilities are located sequentially
- Available capacity
(ATC) is
relatively scarce
Minami-Fukumitsu BTB
500kV Echizen-Reinan line
500kV Soma-Futaba Line
Hokuriku
5GW
500kV Seiban-Higashi
Okayama line
64GW
Tokyo
Chugoku
11GW
Kansai
Chubu
25GW
30GW
Sakuma F.C. 300MW
3333
Shikoku 6GW
Kyushu
16GW
Kii-suido HVDC 1400MW
500kV Honshi tie line
500kV Kanmon tie line
60 Hz
50 Hz

10. Characteristic of Load Curve in TEPCO
Load Curves in Countries and Regions
Ｇｅｒｍａｎｙ UK
TEPCO
PJM
(Hour)
Load increases quite steeply in the morning

11. Present Electricity Market System
Partial liberalization of the electricity retail market
Target:Eligible Customers
(Contract Demand≧50kW Voltage ≧6,000V)
New Entrants use Wheeling Service provided by electric utility companies.(TPA system)
Wholesale
Suppliers
Other Electric Utilities
New Entrants
Generation
Electric
Utility
Company
Transmission
&
Distribution
Wheeling Service
Retail
Eligible Customers
Other Customers
Accounting Separation(to avoid internal subsidies)
Regulated
Liberalized

12. Functions of Electric Power System Council of Japan (ESCJ)
Board of Directors
Utility, Wholesaler, Alternative Supplier, Independent member
Power Exchange
OASIS
Congestion Management of Inter-ties
Enhancement Procedure Management
Grid Code (basic)
Dispute resolution
ESCJ
Tohoku Electric Power Co.
TEPCO
Inter-tie
9 Vertically Integrated Utilities
Planning, Construction and Operation of regional grid for reliable and economic power system operation
Grid Code (regional)

13. Start of Japan Electric Power Exchange (JEPX)
Start with two types of products
Spot markets : Trade of day-ahead electricity
Forward markets
kWh
Yen/kWh

14. Comments on Regulatory Reform Steps from Japan’s Experience
We should take care of …
Consideration of the characteristics of the power systems
‘Well-ordered’ play for participants
Step-by-step liberalization
Opinions from grid operator’s/planner’s point of view

15. Thank you for your attention