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To prevent the fault in the network and secure the reliable power supply, we can offer consultancy services in developing the protection and control systems suitable for the improvement of the power system.

For example, special protection systems for the purposes such as securing the power supply in the very important area or preventing the fault from affecting the wide area, can be studied and developed.

Improvement in Protection Relay Performance

If a protection relay fails to properly operate, a cascading failure followed by a large-scale outage is expected. It is essential that, the actual operation of the existing protection relay be constantly reviewed, including the validity of the relay setting. In addition to this, computation analyses and surveys on operation of the protection relay during the potential disturbance are to be conducted for the current and future system in order to prevent a malfunction. TEPCO has a wealth of experience in operation practices regarding the reviewing of work, relay operation analysis and setting coordination, etc.

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