Second Phase

Vlasina Hydroelectric Power Plants

and

Pumping Station Lisina

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Stanislav Pejovic

part time Enertoptoject

Belgrade, Serbia (Yugoslavia)

Design period:

II stage 1972-1977

Link: http://www.hidrotehnika.rs/en/serbia/vlasina/

Pumping Station

Lisina 28 MW

Pumping Station

Lisina 28 MW

Pumping Station

Lisina 48 MW

Hydroelectric Station. Vrla I to IV 128 MW

Four Power Plants:

Vrla I - 51 MW

Vrla II - 24 MW

Vrla III - 29 MW

Vrla IV - 25 MW

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Total: Vrla (I + II + III + IV) - 129 MW

Pumped Storage Station:

Lisina - 26 MW

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Vrla I Vrla I. Units of first and second phase

Vrla I - Phase II Turbine Specifications Type: Vertical shaft Pelton turbine Head: 321 m Output: 14 MW Discharge: 5 m^3/s Speed: 600 rpm No of units: 2 Hydro Power Plant "Vrla I"

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Vrla II Hydro Power Plant "Vrla II"

Vrla II - Phase II Turbine Specifications Type: Vertical shaft, single stage, single runner, Francis turbine Head: 145 m Output: 13 MW Discharge: 10 m^3/s Speed: 600 rpm No of units: 1

Vrla III Hydro Power Plant "Vrla III"

Vrla III - Phase II Turbine Specifications Type: Vertical shaft, single stage, single runner, Francis turbine Head: 176 m Output: 16 MW Discharge: 10 m^3/s Speed: 600 rpm No of units: 1

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Vrla IV Hydro Power Plant "Vrla IV"

Vrla IV - Phase II Turbine Specifications Type: Vertical shaft, single stage, single runner, Francis turbine Head: 150 m Output: 13 MW Discharge: 10 m^3/s Speed: 600 rpm No of units: 1

Pumped Storage Station "Lisina"

Lisina's lower reservoir storage

Pump Specifications

Type:

Vertical shaft, single stage, single runner, centrifugal pump

Head: 316-339 m

Discharge: 3.4-3.8 m³/s

Input Power: 13 MW

Speed: 1500 rpm

Runaway speed: 2000 rpm

Submergence: 38 m

Mechanical Design

As part time expert at "Energoprojet", Belgrade Prof. S Pejovic had conducted mechanical design of second phase of Vlasina's power plants (Power plants: "Vrla I", "Vrla II", "Vrla III" and "Vrla IV") and "Lisina" pumped storage plant.

Power output of second phase units was increased for 26 %.

Tender Documents

Tender documents for Pelton turbines for "Vrla I" Power Plant and "Lisina" Pumped Storage Station had been carefully analyzed and written.

Transient Analyses

Field tests of hydraulic transient proofed quality of design and plants.

Hydraulic Vibration and Stability Analyses

Hydraulic vibration and stability had been analyzed in frequency domain.

Site Measurements

Field acceptance tests confirmed the quality of the units in operation.

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