D2-01_12 Disaster resilient telecommunications systems for smart grid in Japan

1. CIGRE SC D2 Colloquium November 2013 Mysore - KARNATAKA – INDIA D2-01_12Disaster resilient telecommunications systems for smart grid in Japan Kousuke Kimura Tohoku Electric Power Co., Inc. Japan Noritaka Tamehisa Cisco Systems G.K. Japan AtsushiOharaShikoku Electric Power Co., Inc. Japan oohara14746@yonden.co.jp Ryouichi Ito Fujitsu Ltd. Japan

2. Change of disaster contingency planning Concept of Telecommunication system <Before the disaster> <After the disaster> Experience High reliable (Redundant） High reliable (Redundant) 3.11 Great East Japan Earthquake Use this experience in SMARTGRID telecommunication system High early restoration High early restoration Support early recovery from disaster by IT system

3. Location of Shikoku EPCO and Tohoku EPCO Tohoku EPCO Configuration of TV Conference System using Satellite Communication Links Epicenter of Great East Japan Earthquake (11 March 2011) Shikoku EPCO Disaster Countermeasures for Private Telephone Network Risk of earthquakes in the Tonankai and Nankai area (60%to70% probability of a magunitude 8 to 9 earthquake within the next 30 years)

4. Case of Shikoku EPCO：Disaster Countermeasures for Private Telephone Network Offices Power Stations Private Telephone Network Grid Operating Center Substations Cost Reduction New System Enhanced Convenience Disaster resilience

5. Overview of Old System Branch office Power station Grid control center • 60 PBXunits • Terminals: • Analog phone • Digital phone • PHS *CS(Cell station) is at the same location as PBXes. Other offices PBX Trunk line CS PHS Analog phone Public Switched Telephone Network Digital phone Sales offices Substations

6. Overview of New System Branch office Power station Grid control center • 22 IP-based PBX units • Terminals: - Analog phone - Digital phone - PHS • IP terminals: - PSTN-GW - IP-RU - IP-CS - IP-phone *IP-CS can be deployed at the place where can connect to IP-network. Other offices IP-PBX Trunk line CS PHS Analog phone Public Switched Telephone Network Digital phone Control Back up IP-Network Sales offices Substations PSTN-GW IP-RU IP-CS IP- phone IP-CS

7. Benefits of Deployment of New System

8. Steps to achieve Disaster Resilience (1)Wide-area Backup System IP terminals select other PBX automatically to ensure continuity of call control in the event of failure of normal connections Deployment of Backup stations

9. Steps to achieve Disaster Resilience (2) Improved Reliability of the Existing IP Network The microwave radio network that provides greater disaster resilience than optical fiber lines is employedas the alternative route. In a East Japan great earthquake, many of micro wave radio network survived. microwave radio network Optical fiber lines

10. Case of Tohoku EPCO：Disaster Countermeasures for Private Telephone Network Purpose The backup line is composed. A temporary line is composed in the disaster area. System Configuration

11. Use of the VSAT System during the Great East Japan Earthquake When East Japan great earthquake occurs（March 11, 2011） The wide range is blacked out. The telecommunication line of coastal flows out by the tsunami. For recovery The telephone and the fax lines are necessary in the office. The remote monitoring and control lines are necessary in the power plant and substation.

12. Use of the VSAT System during the Great East Japan Earthquake A temporary line was constructed with the VSAT system. In 3 days : The telephone and the fax lines were restored. In 2 weeks : The remote monitoring and control lines were restored. Other power companies cooperated in the preparation of the necessary transportable VSAT stations. It contributes to the early recovery of the disaster.

13. Use of the TV Conference System during the Great East Japan Earthquake The TV conference system was used for the disaster recovery at the East Japan great earthquake. System configuration - 183 TV conference terminals in 113 offices. - Stationary terminal and portable terminal. - MCU(Multi Control Unit) When East Japan great earthquake occurs（March 11, 2011） With the exception of offices the communication lines of which had been destroyed by the tsunami, the TV conference system were available for use in offices.

14. Use of the TV Conference System during the Great East Japan Earthquake -It was used to aid disaster recovery actions from the very day the Great East Japan Earthquake struck. -The TV conference system was used frequently for information sharing. <Usage Number, Time> March 11,2011~ March 31,2011(For 21 days) Number of total conference : 360 times. Total conference times : for 434 hours.

15. Use of the TV Conference System during the Great East Japan Earthquake TV Conference held during the Great East Japan Earthquake (Emergency Anti-disaster Headquarters in the Head Office) It contributes to the early recovery of the disaster.

16. Linkage of the VSAT System and TV Conference System The new system are composed by VSAT system and TV conference system. Bandwidth 32kbps 192kbps The TV conference can be promptly held in any locations at the emergency disaster.

17. Expected Benefits The ability to view images directly from disaster sites at the emergency anti-disaster headquarters provides more accurate information. Technical support can be provided for affected facilities and work instructions can be transmitted directly to disaster sites. Setting up the system at disaster sites as an image monitoring unit cuts down on monitoring work.

18. Conclusion We strongly felt the possibility of ICT forconsidering disaster-resistant and supporting early recovery, from the experience of disaster. We learned many things from these use cases. - How to ensure the communication system (telephone, video conference) is important to assist recovery from disaster. - VSAT and micro-ware wireless network are highly reliable and we can use it in case of wide area disaster. - In case of disaster, we can do early action if we have communication system which can use in emergency. We would like to use these good experience for expansion of electric power telecommunication system which aim at SMARTGRID deployment.

19. Thank you ! Next: Answers to the Special Report Questions

20. Special Report Q1-7 Q1-7. The authors are invited to provide details of new IP based system and its comparison with old systems. <Answer> We explained the answer of this questionat case of Shikoku EPCO ”Disaster Countermeasures for Private Telephone Network”. Please watch page 4,5,6 sheet.

21. Special Report Q1-8 Q1-8. Does Shikoku and Tohoku Electric Power Companies have standalone disaster resilience and support with dedicated telecommunication systems? How are they integrated to the enterprise bus of the other utility systems? <Answer> VSAT system is the one which has capability of disaster-resistant independently, and we can compose it if fixed VSAT station is connected to internal network in advance. Shikoku Electric Power Company has VSAT system and fixed VSAT station is connected to internal telephone network. We can connect to internal telephone network using mobile VSAT station from the place which encounter the disaster and can't use existing telecommunication system. Tohoku Electric Power Company, as describing in this paper, in addition to FAX system and remote monitoring and control line, we can connect to the TV conferencing system.

22. Thank you again !