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Taitō-ku, Japan

Mutou Y.,Tokyo Metro Co.
Life-Cycle of Structural Systems: Design, Assessment, Maintenance and Management - Proceedings of the 4th International Symposium on Life-Cycle Civil Engineering, IALCCE 2014 | Year: 2015

Tokyo Metro Co., Ltd. (Tokyo Metro) operates a subway network with nine lines over a total distance of 195.9 km in the Tokyo Metropolitan area, the world’s most massively urbanized area. The subway network provides services for 6.44 million passengers a day. Subway’s infrastructure development, and operation and management are undertaken by the same entity, that is, train operations and facilities management are integrated. This paper describes the maintenance of tunnels, including the Ginza Line, in which the Ueno - Asakusa section was opened for service in 1927 (the whole line opened in 1939). © 2015 Taylor & Francis Group, London. Source

Toge M.,Tokyo Metro Co. | Kurita Y.,Waseda University | Iwamoto S.,Waseda University
IEEE Power and Energy Society General Meeting | Year: 2013

Wind power is a major source of renewable energy, and is in great demand around the world. However, wind power is difficult to manage due to large fluctuations in power output. To alleviate such fluctuations, this paper proposes a method for suppressing frequency deviation in wind power generation using storage battery systems that considers state of charge (SOC) and response speed differences between generators and storage battery systems. The method adjusts storage battery output according to present SOC, and applies H ∞ control theory to the generator controller to achieve robust control considering parameter fluctuations generated by state variations in the power system. Using this approach, we design a load frequency control system that controls both internal variation caused by power system dynamics and external variation caused by wind power generators. To verify the validity of the proposed method, we perform LFC simulations and compare frequency deviations between the proposed and conventional methods. © 2013 IEEE. Source

Hasegawa M.,Tokyo Metro Co.
Japanese Railway Engineering | Year: 2014

Tokyo Metro Co., Ltd. (Tokyo Metro) and Japan International Consultants for Transportation Co., Ltd. (JIC), in conjunction with Japan International Cooperation Agency (JICA) have been awarded the "Technical Assistance Project to Strengthen the Capacity of Regulator and to Establish Operation and Maintenance of Metropolitan Railway Lines in Hanoi City." Subsequently, Tokyo Metro entered into an agreement with JICA on February 25, 2013. Although Tokyo Metro has had experience dispatching employees overseas, this project is the first time for it to engage in a full-fledged overseas assistance project. Source

Nakajima M.,Tokyo Metro Co.
Japanese Railway Engineering | Year: 2010

In 1996 when the Tokyo Metro Co., Ltd. established the Integrated Control Center to integrate the operation of various subway lines, it put into place the "Rolling Stock Dispatcher" to support car assignment, schedule recovery, etc. At the same time, it also launched the "Rolling Stock Information Management System" to facilitate the sharing of information with car depots. Due to the opening of the Fukutoshin line and the need for replacing obsolete systems, the abovementioned systems were slated for upgrade. Further improvements to the safety and reliability of train transport were selected as themes for adopting new systems. In this backdrop, the following system is being developed. This article introduces a automatic scheduling system for rolling stock, which is a major function supporting "safe transport," one of the themes. Source

Among Tokyo Metro's approximately 200km of subway lines, the Tozai Line that connects Chiba Prefecture and mid-Tokyo experiences congestion of up to 199% at worst and relief of this has become urgent. Therefore, as it is imperative to increase the number of trains operating in the exceptionally congested area from mid-Tokyo going east, a large-scale renovation work is planned between lidabashi Station and Kudanshita Station that will facilitate turn-back via 3 tracks. While ensuring the safe and stable operation responsible for about 1.35 million passengers daily, this highly difficult work of inner wall demolition and reinforcement of the side walls and floor slabs will only be implemented for 3 hours during late night. This paper discusses large-scale plans to improve turn-back facilities, and the methods of construction therein as an example of operational improvement of a subway network. Source

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