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Reconstruction of the SHPP Les Království. Reconstruction of the Small Hydro Power Plant Les Království, Czech Republic. Miloslav Šlesinger Karel Kyzlink. Hidroenergia 2008 13 th June 2008 – Bled, Slovenia. Reconstruction of the SHPP Les Království. Introduction

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reconstruction of the shpp les kr lovstv
Reconstruction of the SHPP Les Království

Reconstruction of the Small Hydro Power Plant

Les Království, Czech Republic

Miloslav Šlesinger

Karel Kyzlink

Hidroenergia 2008

13th June 2008 – Bled, Slovenia

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Introduction

In December 2003 ČKD Blansko Engineering, a.s., obtained a turkney contract for reconstructions of SHPP Les Království in Czech Republic.

The goal of the reconstructions of this power plant was the replacement of an existing hydromechanical equipment produced in 1923.

Supplies for the reconstruction included the technological part, the electrical part, and civil works.

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Dam crest

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Dam architecture

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království
  • Historyofthe dam andthesmallpower station
  • Dam construction 1910–1919
  • Powerplant 1923
  • Major overhaul 1952–1959
  • Technical monument 1964
  • Reconstruction 2005

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království
  • Original technological equipment of theSHPP
  • Two horizontal-shaft twin Francis turbines (each was designed for a 4.5m3s-1 discharge, 600kWpowerand 428 rpm speed), produced by Českomoravská-Kolben in Prague
  • Two horizontal synchronous generators, produced by Fr. Křižík, Prague
  • Two hydraulic turbine governors, produced by PRAGA, Prague

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Horizontal-shaft twin Francis turbine (cross section)

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Horizontal-shaft twin Francis turbine (cross section)

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království
  • Overall scope of the reconstruction
  • Technological equipment:
  • Major overhaul of the intake structure emergency closing gate
  • Sealing of the penstock
  • Turbines and generators
  • Power house ventilation
  • Electrical part:
  • Control system
  • Low voltage switch room, accumulator battery
  • 1600kVA and 250kVA transformers
  • 6.3kV and 35kV switch room
  • Civil part:
  • Demolition works
  • Concrete structures

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království
  • Solutionoftechnological part reconstruction
  • Thesupplyofnewtechnologicalequipmentconsistedof:
  • 2 butterfly valves
  • 2 horizontalFrancisturbines
  • 2 horizontalsynchronousgenerators
  • 2 hydrauliccontrol set
  • major overhauloftheintakestructureemergencyclosinggate

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království
  • Solution of hydraulics
  • The flow in the discharge canal was simulated numerically in Fluent CFD software by two-phase flow simulation with free water level.
  • Outlet canal capacity was evaluated because of the total discharge gain from 9 to 12 m3s-1
  • Height position of the draft tube discharge profile compared to outlet canal ground was analyzed
  • Draft tube shape was optimized using CFD computations

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Contour of velocity magnitude

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Water flow in the outlet canal

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Main technical parameters of the technological equipment

  • Turbine:
  • Horizontal Francis turbine with turbine runner overhung on the generator shaft
  • Runner diameter 1040 mm
  • Discharge 6m3s-1
  • Speed 375 rpm
  • Head 22.5 m
  • Maximum power 1180 kW
  • The distributor servomotor is controlled by pressure oil from a hydraulic control set with 12MPa operational pressure

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Horizontal Francis turbine (cross section)

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Turbine and hydraulic control set

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království
  • Generator:
  • Horizontal 3-phase synchronous generator
  • Apperent power 1300 kVA
  • Watt power 1108 kW
  • Nominal voltage 6300 V
  • Speed 375 rpm
  • Sliding generator bearing (one radial axial and one radial bearing)
  • The generator is air-cooled

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Horizontal 3-phase synchronous generator

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království
  • Butterfly valve (in front of each turbine):
  • Diameter 1400 mm
  • Opened by pressure oil from the hydraulic control set and closed by weight

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království
  • Irrigationdischargepipe:
  • Diameter 500 mm
  • Capacity 1,9 m3s-1
  • To ensureanautomaticoutletofminimaldischarge to theriverwhenbothturbines are shutdownatthesametime (butterfly valveopened by weight)

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království
  • Process of operations on site:
  • Machines shut-down 1. 5. 2005
  • Reconstruction started 2. 5. 2005
  • Work progress:
  • Sealing of the penstock and dammimg and emptying the outlet canal under the power house
  • Disassembly of existing equipment
  • Civil works
  • Installation of new technology
  • Major overhaul of the emergency closing gate
  • Repair of outlet canal concrete construction under the power house
  • Disassembly of the steel plug
  • Perfoming tests
  • Works finished 30. 11. 2005

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království
  • Intake sealing
  • Steel plug diameter 2400mm
  • Design pressure 27mwater column
  • Installation on the penstock inner sheath by divers in the depth of about 16m

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království
  • Disassembly of existing turbines, generators and governors
  • According to office of conservation project

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Transport – incline lift

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Transport of the spiral case

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Civil works on draft tube unit 1

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Spiral case unit 1

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

Turbine house after the reconstruction

Unit 2

Unit 1

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království
  • Environmental precautions
  • Use of two-circuit cooling system of generator bearing lubrication aggregate with stainless steel cooling coil placed in the SHPP outlet canal
  • Installation of retaining tanks under hydraulic aggregates
  • Self-lubricating fit of guide vane stems
  • Self-lubricating wheel track stems and connecting rod stems of theemergency closing gate

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království
  • Technical conditions (restrictions) of the reconstruction
  • Disassembly of existing turbines, generators and hydraulic governors according to office of conservation project (now being an exhibit of the National Technical Museum in Prague)
  • Major overhaul of the emergency closing gate – the intake structure could not be temporarily dammed, so the dimensions had to be located by divers
  • In order to disassembly the existing butterfly valves and turbines and to install new ones, intake sealing by the steel plug was necessary
  • Transport conditions – allbuildingmaterialandequipmentweretransportedusing a incline lift with 8t loadcapacity
  • An expertise of the existing engineering constructions built between 1919 and 1923 was made in order to resolve transmission of load forces from the technology to existing concrete supporting structures. Its correct evaluation was needed to determine the rescue works procedure and facture and to install new technological equipment

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království
  • Conclusion
  • Current operation of the machines has proved that projected power specifications have been achieved
  • All guaranteed parameters like power output and efficiency of newturbine-generator units and transformers were met
  • The benefit of the reconstruction was a complete renewal of the obsolete mechanical and electrical equipment
  • A higher utilization of present water resources potential during the year by as much as 40% was achievedthanks to the gain of flow rate through new turbines from2x 4.5m3s-1 to 2x 6m3s-1 and thegainof maximum installed turbine power from2x 600kW to 2x 1180kW

HIDROENERGIA 2008, Bled, Slovenia

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Reconstruction of the SHPP Les Království

ČKD Blansko Engineering, a. s.

Čapkova 2357/7

678 01 Blansko

Czech Republic

www.cbeas.com

„We do all for the future without polluted environment“

HIDROENERGIA 2008, Bled, Slovenia