5 mw permanent magnet
TRANSCRIPT
5 MW Permanent MagnetOffshore Wind Energy Converter
Dr. Georg Möhlenkamp
May 2004MayMay 2004 2004
4MOP007_5 MW-Permantent Magnet_00EN.pptT
05.2004 APCG / 4MOP007_5 MW-Permantent Magnet_00EN.PPT / Dr. MÖHLENKAMP / Be 2
5 MW Offshore Wind Mill Prototype
� Market Trends
� System requirements for an Offshore Wind Mill
� System Solution for an 5 MW Offshore Wind MillPrototype
� Electrical System– Generator– Converter
Content
with friendly approval by Multibrid Entwicklungs GmbH
05.2004 APCG / 4MOP007_5 MW-Permantent Magnet_00EN.PPT / Dr. MÖHLENKAMP / Be 3
Market Dynamics
� Move to more powerful, largersized wind turbines withmaximum energy output
� More and more variable speeddrives are used with respect tobetter performance, reliabilityand improved economicaloperation
� Power utility companiesdemanding higher mains supplystability
Increasing demand for wind energy / on-and offshore installations
ALSTOM established as supplier for Generator-/Converter Systems
05.2004 APCG / 4MOP007_5 MW-Permantent Magnet_00EN.PPT / Dr. MÖHLENKAMP / Be 4
1,502,00
5,00
0
1
2
3
4
5
6
1980-1990 1994 2000 2001 2002 2003
Year
Power[MW]
2,75
Market Dynamics
Evolution of power ratings
05.2004 APCG / 4MOP007_5 MW-Permantent Magnet_00EN.PPT / Dr. MÖHLENKAMP / Be 5
Market Dynamics
Generator- and convertersystems for variable speed solutions
Synchronous generator with fully rated converter
20 k
V AC
G
Doubly-fed asynchronous generator with converter
20 k
V ACG
05.2004 APCG / 4MOP007_5 MW-Permantent Magnet_00EN.PPT / Dr. MÖHLENKAMP / Be 6
Maximum reliability guarantees highest availability of Multibrid offshorewind energy converter, this is achieved:
5 MW Drive system
System requirements for an Offshore Wind Mill
� elimination of high speeds� small number of rotating parts� few noise sources� only two meshings� a structure made stiff against torsion from hub
The small mass of the tower head affects the favorable dimensioningof tower and foundation.
05.2004 APCG / 4MOP007_5 MW-Permantent Magnet_00EN.PPT / Dr. MÖHLENKAMP / Be 7
Highly Integrated Drive-Train Concept
05.2004 APCG / 4MOP007_5 MW-Permantent Magnet_00EN.PPT / Dr. MÖHLENKAMP / Be 8
Highly Integrated Drive-Train Concept
05.2004 APCG / 4MOP007_5 MW-Permantent Magnet_00EN.PPT / Dr. MÖHLENKAMP / Be 9
� Electrical– Complete factory test of the converter system– „Worst case“ construction: electr. emergency brake– Save operation caused by conditioning atmosphere
� Mechanical– Surface seawater resistant– Corrosions resistance against salt content in the air– Vibration resistance
� Minimal erection and commissioning– High infrastructure cost (sea based cranes)– Weather dependence on sea: short windows only
� Service friendly design– Teleservice– in case of problems, quick exchange
System requirements of the electrical system
System requirements for an Offshore Wind Mill
05.2004 APCG / 4MOP007_5 MW-Permantent Magnet_00EN.PPT / Dr. MÖHLENKAMP / Be 10
5 MW Antriebssystem
� High power density due tooptimised gearbox- andgenerator concept
� Medium voltage converterand transformer in offshore-container
� Permanent magnetssynchronous generator
“MULTIBRID” Wind Converter System
Hersteller: Prokon Nord Energiesysteme GmbH
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5 MW Antriebssystem
Data sheet MULTIBRID M5000
Technical data :
Blade pitch systemMethod electrical single blade adjustmentPower control pitch- and speed control
Generator und converterRated power 5315 kWType of construction Synchronous generator, permanent magnetRated voltage 3000 VRotation speed range 58.6 - 146.9 min-1
Cooling Water coolingProtection class IP 54Type of construction 4-quadrant-GTO-converterPower factor 0.9 inductive to 0.9 capacitive
05.2004 APCG / 4MOP007_5 MW-Permantent Magnet_00EN.PPT / Dr. MÖHLENKAMP / Be 12
USV
U <>
I >I >>
f <>
20 kV 6 MVA
3.0 kV
20 kV 160 kVA0.4 kV
G
5.3 MVAUN = 3.0 kV
Transformer-ContainerGrid connectedSwitchgears in
Tower
3 �50 Hz20 kV
Sea cable
Converter-Container
Electrical Concept - Overview
5 MW Antriebssystem
M
M M
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5 MW Drive system
“MULTIBRID” Wind energy converter
Transformercontainer
Convertercontainer
Tower
Passable level in the tower,in the containers and
on the passable platform
Cable floor in the tower, in the containers and
below the passable platformStanding position for container(Support construction)
05.2004 APCG / 4MOP007_5 MW-Permantent Magnet_00EN.PPT / Dr. MÖHLENKAMP / Be 14
Medium Voltage Converter
0V 0V 0V
dv / dt - filter
Basic connection 3 level medium voltage (NPC)
Converter-Clamp Voltage(without filter)
ud
ud2
Pulse frequency 250 Hz
t1
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ALSPA VDM 7000, Rated Power 6 MVA
Mains
Generator
U
V
U
20 kV50 Hz
3 kV0 ... 40 Hz
3 level GTO Phaseleg
W
V
W
Medium Voltage Converter
PMSG3~
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Medium Voltage Converter
Phaseleg ALSPA VDM7000
� Pulse converter� Liquid cooling type� Machine voltage: 3 kV
� Power: � 5 MW
� Power factor: controllable
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Resistant against environment influences
Medium Voltage Converter
� Seawater resistantcontainer
� Corrosion resistance for allclimates, especially againstsalt content in the air
� Reliable operation thanksto air conditioning
� Vibration proved
05.2004 APCG / 4MOP007_5 MW-Permantent Magnet_00EN.PPT / Dr. MÖHLENKAMP / Be 18
Type of Permanent Magnet Machine
Our experience :Magnet weight reduced
ALSTOM’s choice as per today.
Generator
� Radial Flux� Surface Mounted Permanent Magnets
(SMPM)
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C Type Generators
Example of Main Characteristics
Mains data� 5.260 MW, 3 000 Volts, 1 020 A� 28 Poles, 13.7 - 34.3 Hz� 58 - 147 RPM
(Single stage gear box, ratio 1:10)� Liquid cooling
Weights & dimensions� 25 000 Kg
(Rotor 10 000 kg + Stator 15 000 kg)� Stator : OD 2 700, ID 2 120� Rotor : OD 2108, CL : 900
ALSTOM generator’s scope of supply:� PM Rotor
(rim + magnets)� Wound Stator with WJC� Stator insertion into the frame� Rotor insertion into the stator� Heat exchanger� HV & Auxiliary TB
Off-shore design
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Generator
Structure and connection to the transmission
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C Type Generators
PM Generator 5 MW - 145 RPM
www.alstom.com