erko lepa thorsten harder alexander faulstich
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Erko Lepa Thorsten Harder Alexander Faulstich [email protected] [email protected] [email protected] ABB Finland, Helsinki ABB Switzerland, Turgi ABB Switzerland,Turgi . - PowerPoint PPT PresentationTRANSCRIPT
EWEA 2013 Europe´s premier Wind Energy event Wednesday, 6 February 2013, Vienna Electrical systems from torque to grid (ID 286 OC)
Erko Lepa Thorsten Harder Alexander [email protected] [email protected] [email protected] Finland, Helsinki ABB Switzerland, Turgi ABB Switzerland,Turgi
Design and testing of a 7MW Wind turbine Medium voltage electricaldrivetrain with Medium speed permanent magnet synchronous generator
© ABB GroupApril 21, 2023 | Slide 2
Agenda
Evolution of wind turbine drives Main concepts of megawatt range wind turbines Benefits of Medium speed and voltage drivetrain Design of Medium speed and voltage drivetrain Back-to-back test
© ABB GroupApril 21, 2023 | Slide 3
MS PMSG7 MW
HS DFIG1.5 MW LS PMSG
2 MWMS PMSG ...5 MW
HS PMSG2.5 MW
Evolution of wind turbine drivesEmerged serial production technologies
1900 1980 1983 1995 1997 1998 1999 2000 2002 2003 2005 2010 2012 2013
HS PMSG5.7 MW
High Speed: - Squirrel cage ind.gen.- Direct online
High Speed- Doubly-fed ind.gen- LV converter
Medium Speed:- Permanent magnet- MV converters
Various types of multi-megawatt drivetrains(Offshore)
Low speed:- Electrical exit. syn.gen- Permanent magnets- LV converters
2001
Evo
luti
on
in w
ind
PCS 1000 2 MW PCS 6000
6 MWPCS 6000 10 MW
© ABB GroupApril 21, 2023 | Slide 4
Main concepts of megawatt range wind turbinesMain drivetrain concepts
Low speed• Gearless DD• Turbine speed
Medium speed• e.g. 1- or 2-stage geared• 100 - 500 rpm
High speed• 3-stage geared• 1000 - 2000 rpm
© ABB GroupApril 21, 2023 | Slide 5
Benefits of Medium speed and voltage drivetrainDrivetrain Efficiency = Gearbox * Generator * Converter * Transformer
DD with PM
DD with EE
MS with PM
MS with EE
HS concepts
P(V
)^3
Annual wind distribution
© ABB GroupApril 21, 2023 | Slide 6
Benefits of Medium speed and voltage drivetrain
Medium voltage at multi-megawatt: Small currents: Low cabling effort,
lower losses Generator design easier: Easier to
manufacure, optimum terminal box Medium speed:
Compact solution Optimum speed, less wear
MV converters: Reduced number of components Robust and proven semiconductor
technology
Voltage, Rotation speed
Example of high current machine -> MAIN CONNECTION BOX
© ABB GroupApril 21, 2023 | Slide 7
Design of Medium speed and voltage drivetrain
Permanent Magnet Synchronous Generator
Output power: 7.35 MW Nominal speed: 400 rpm Nominal voltage: 3.3 kV Shaft height: 1120 mm V-type18 poles rotor Pole shoes made from steel Optimized magnet mass Optimized cogging torque and ripple IC86 cooling
Design of the Generator
© ABB GroupApril 21, 2023 | Slide 8
Design of Medium speed and voltage drivetrain Design criterias of the MV Converter (PCS 6000)
Minimize Levelized cost of energy Lowest converter losses Highest availability (due to minimized
amount of components Lowest cabling costs/losses
Meet gird code requirements Quick customizable design
Proven components Flexible layout for customized
footprint
© ABB GroupApril 21, 2023 | Slide 9
Design of Medium speed and voltage drivetrainCompleted
© ABB GroupApril 21, 2023 | Slide 10
Back-to-back test
Efficiency of generator 98.2 % (nominal point) Temperature rise of generator in B class No demagnetizations occured during short-circuit test Vibrations analysed and met the expectations (worst case < 0.75 mm/s) Optimum switching frequency determined
Summary of key results
Test Setup
© ABB GroupApril 21, 2023 | Slide 11
Back-to-back testStator yoke radial vibration at SF of 720 / 700 / 600 Hz
1mm/s
0.1mm/s
10mm/s
10um/s
400 Hz 600 Hz 800 Hz 1000 Hz200 Hz
720Hz / 700 Hz / 600 Hz
0 Hz
© ABB GroupApril 21, 2023 | Slide 12
Conclusions
Medium voltage at high turbine power is better Medium speed concept with PMSG is compact solution Medium speed means less wear in drive train components Medium speed PMSG concept provide the best efficiency at nominal point
© ABB GroupApril 21, 2023 | Slide 14
Time for Questions
Interesting links to check http://www.youtube.com/watch?v=clKaxJALU_4 http://www.youtube.com/watch?v=l-w10GLvZBE http://www.youtube.com/watch?
feature=endscreen&v=6LL58mUe8Ek&NR=1