Facilities to Ensure Stable Power Supply

Flow of Electricity

Electricity generated at power plants is delivered to customers via power facilities such as transmission lines, substations, and distribution lines.

Electricity flow diagram

Power Transmission Facilities

Transmission lines serve to connect power plants to substations, and substations to each other, in order to transmit electricity. In addition to overhead transmission lines suspended from steel towers or other constructions, underground transmission lines are also used, mainly in urban areas.

Power transmission facilities

Substation Facilities

To reduce loss caused during power transmission, these facilities either convert electricity generated at power plants into higher voltages such as 275 kV or 500 kV, or convert higher voltages from transmission lines back into low voltages suitable for use by customers.

Substation facilities

Power Distribution Facilities

These facilities deliver the electricity transmitted from power plants via transmission lines and substations to customers.Ordinary households are supplied with standard low voltages, while factories, office buildings and similar receive higher voltages depending on their scale of operations.

Power distribution facilities

Load dispatching Facilities

Comprehensive control of the various facilities in the power system serves to ensure a stable supply of electricity to homes and factories etc., 24 hours a day, 365 days a year.

Load dispatching Facilities