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The Kaunas HPP is the biggest power plant in Lithuania using renewable energy resources for power generation. Electricity produced in this power plant accounts for more than 80% of the generated output of this type of energy. Every year the power plant generates about 2% of the total quantity consumed in Lithuania.
The Kaunas HPP is the only power plant in the Lithuanian power system which is capable of solely starting operation after a complete blackout of the power system. It is the most important generation source in the case of a black start or a scheme separation. Despite its rather small capacity, the Kaunas HPP is an exclusive generating source ensuring the reliability of the Lithuanian Power System. Electricity produced in the Kaunas HPP is supplied to the 110 kV network.
The relevant technical status of the Kaunas HPP is maintained during routine maintenance works and overhauls when certain equipment or facilities are rehabilitated or replaced. The National Energy Strategy provides that the Kaunas HPP has to be rehabilitated by 2007.
Basic technical data
- The Kaunas HPP is a channel type hydro power plant located 224 km from the mouth of the Nemunas River.
- Capacity – 100.8 MW
- Number of hydro units – 4
- Height of building’s crest 48.0 m
- Nominal height of head 44.0 m
- Maximum height of head 45.6 m
- Maximum discharge of water 3990 m³/s.
Design of hydro power plant
- 1st and 2nd soil dams: blind, constructed from sand and loam, with central core, length – 912 m, highest point of construction – 19 m
- The power plant building is made of ferro-concrete, length – 75.5 m, height – 37.5 m
- Gravitation type spillway, three spillway gates of practical profile 20 m each, pressure – 7 m, total length – 79 m
- Height of the spillway – 37 m, segmental shields
- Maximum permeability – 3300 m³/s
- The 3rd soil dam: blind, made of washed sand, 464 m in length, maximum height 26 m
Main generating equipment – turbines
- Type PL 20–661-VB-500
- Maximum capacity 26 MW
- Maximum discharge 190 m³/s
- Water head 15.0 m (13 m–20.5 m)
- Number of revolutions – 125 rev/min
- Number of blades – 4
Generators
- Type VGS – 700/100
- Capacity – 25. 2 MW
- Voltage – 10.5 kV
Key dates of construction
- October 1955 – Beginning of construction
- 1959 07 10 – Flooding of ravine
- 1959 07 19 – Capture of the Nemunas River
- 1959 11 05 – Start up of operation of Unit 1
- 1960 02 23 – Start up of operation of Unit 2
- 1960 02 26 – Start up of operation of Unit 3
- 1960 04 18 – Start up of operation of Unit 4
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