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Construction Operation & Maintenance

Hydro Power

Regarding TEPCO's hydropower plants in Japan, we have been operating 160 hydropower plants, inclusive of 8 pumped storage type, which cover more than 8,500MW of installed capacity. Also, we have performed engineering services abroad especially in Southeast Asia to date.

In view of engineering technology, we have many and various experience regarding dam, tunnel, underground powerhouse, penstock, headrace, tailrace and so on taking into consideration both of minimum cost and environmentally friendly development.

Our services are not only design and construction supervision but also operation and maintenance with the aim of achieving sustainable development and water efficiency use.

TEPCO also offers suitable engineering services for IPP hydropower projects for planning, design, construction supervision, operation and maintenance.

Lubrication Oil Diagnosis for Hydro Power Facilities
Lubrication Oil Diagnosis for old hydro power plants by worn particles check in turbine oil

Turbine oil is used as bearing lubrication oil for hydraulic turbine generators. It is analyzed oil viscosity, water content, oxidation degree, etc. including temperature watching, because of prevention of bearing metal abrasion.

In general, oxide compounds and worn particles increase over time and may invite bad conditions such as temperature increase of bearing metal, poor lubrication, etc.

The contaminants are classified in Table 1. In order to find a sign of bad condition, the properties of worn particles in the oil are checked to diagnose lubrication in operation.
Therefore the diagnostic equipment is developed by cooperative research (Fig. 2).

img01
Fig. 1 Classification of contaminants

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Fig. 2 Diagnostic equipment for lubricating oil



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