source: vatech hydro, austria
TRANSCRIPT
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/1
9. 9. Examples of hydro energy conversionExamples of hydro energy conversion
Source:
VATech Hydro, Austria
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/2
Variable speed pump storage power plant
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/3
Conventional pump storage power plant withsynchronous motor-generators
Source:
VA Tech, Austria
Kaprun/Austria:
Synchronous motor-generators at fixedsynchronous speed,directly gridoperated
Generator
Peltonturbine
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/4
Variable speed pumpstorage power plant
Cyclo-converter
Convertertransformer
Converterbreaker
Stator shortcircuit switch
Generatorcircuit breaker
Linetransformer
Line circuitbreaker
AsynchronousMotor/Generator
SynchronousMotor/Generator
Converterbreaker
Stator shortcircuit switch
Generatorcircuit breaker
Linetransformer
Line circuitbreaker
AC DC
Excitationtransformer
Source:
VA Tech Hydro/Austria
Goldisthal/
Germany
power plant
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/5
Variable speed pump storage power plant
Pump storage power plant Goldisthal/Thuringia, Germany:a) Grid operated synchronous Motor/Generator:Data: 331 MVA, 333.3/min, 18 poles, 50 Hz
b) Doubly fed induction motor-generator:Data: 340 MVA, 300 ... 346/min, 18 poles, 50 HzRotor side converter: Cyclo-converter for low frequencyRotor slip: +10% ... 5% slip = max. frequency in rotor 5 Hz
Variable speed pump operation saves energy. At low water flowspeed and power is decreased, at high water flow rate speed isincreased.
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/6
Principle of cyclo converter
Four-windingtransformer for
feeding theconverter
Output frequency fout < 50% of input grid frequency, so well suited for low frequencyoperation
Grid side, gridfrequency 50 Hz
A: positive B: negative
current current
Thyristor controlledanti-parallel rectifier
bridges B6C
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/7
Output wave form of one leg (phase) of cyclo converterVoltage output: Consists of primary grid voltage at different firing angle to get sine wave
Current output: Winding inductance smootheswave to nearly sinusoidal shape
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/8
Synchronous generators for small hydro power
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/9
Stator iron core for salient pole synchronous generator
Source:
VA TechHydro,Bhopal,
India
Low speed operating synchronous generator, river power plant
Radialventilation
ducts
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/10
Rotor salient pole manufacturing
Source:
VA TechHydro,Bhopal,
India
Massivepolepressingplates
Dove tailrotor pole
Laminationpressed bypressingplates
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/11
Completed salient pole synchronous rotor, 8 poles
Source:
VA Tech Hydro,Bhopal, India
Fly wheel to increaserotor inertia to limit
acceleration in case ofload drop
Shaft mounted fan withforward bent radial
blades for rotation inclockwise direction at
fixed speed
Kauli power plant
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/12
Stacking round rotor for synchronous generator
Source:
VA Tech Hydro,Bhopal, India
Hydraulic cylinders for pressing rotor ironstack
Rotor cylindrical iron core
8 pole rotor with 72 rotor slot pitches, butonly 48 rotor slots for 24 rotor field coils
- 3 concentric field coils per pole
- 72 rotor round damper bars
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/13
Round rotor synchronous machine, 8 poles
Source:
VA Tech Hydro,Bhopal, India
Three field coilsper pole: qr = 3
Damper cage with9 bars per pole
Radial ventilationducts
Glass fibrebandage for fixingrotor coil overhang
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/14
Inserting two-layer form wound HV stator coils
Source:
VA Tech Hydro,Bhopal, India
4 polewinding
pitched statorcoils
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/15
Completed stator form-wound HV winding
Source:
VA Tech Hydro,Bhopal, India
Stator windingoverhang of two-layer pitched coilwinding
connectingcopper rings forparallelconnection ofstator coils
DARMSTADTUNIVERSITY OFTECHNOLOGY
Dept. of Electrical Energy ConversionProf. A. Binder 9/16
Stator housing forcylindrical rotor
synchronous machine
Source:
VA Tech Hydro,Bhopal, India
Welded housing for air-air heatexchanger
Housing for stator iron core
stator iron core before being inserted
stator coils before inserting into statorslots