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Construction Operation & Maintenance

Substation

TEPCO have 1577 substations in 2005. We have built a variety of substations depending on their purpose, supplying voltage, installing cost, and its supplying area. 500kV large-scale underground type substation has been built for stable and efficient supply for Tokyo metropolitan area.
Even though we operate a variety of substations and machineries, We have achieved very low annual average electricity interrupting time. For stable supply, we have introduced many up-to-date techniques. And we have organized quality management system for substation design and construction (e.g. Guidelines for installation of SF6 Gas Insulated Switchgears.). And we have developed effective diagnostic/maintenance techniques for every machinery (e.g. dissolved gas analysis and circuit breaker operation monitoring are employed).
We can offer the best solutions for substation construction/operation from our technical experience. Substation Control Automation (SCADA)
SCADA System
RTU (Remote Terminal Unit) installed in distribution & transmission substations and SCADA system can make substations unmanned and remote monitoring and controlling substations possible.

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TEPCO's SCADA Technology
  1. High Reliability
    Doubling main parts and TEPCO's much experience about SCADA system design can realize high reliability & availability.

  2. Monitoring Substations
    Automatic monitoring and displaying of substation condition can be conducted based on the information from RTUs.

  3. Operation of Substation equipment
    Manual operation by operators and automatic operation by SCADA system are possible.

  4. Automatic Message
    SCADA system can edit messages about fault information, etc. and messages are reported to related offices automatically.

  5. Substation Operation Supporting Function
    Various information needed for substation operation (operation record, load status record, etc.) can be generated automatically.


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