Date post: | 05-Jan-2016 |
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Rotating and Linear Synchronous Generators for Renewable Electric
Energy Conversion - an Update of the Ongoing Research Projects at Uppsala
University
Presenter: Björn Bolund
Author: whole group
Research Areas
A. Water Current EnergyB. Bio-fuelled plantsC. Wave EnergyD. Wind EnergyE. Hydro Power
F. Pulsed power
?
Water current energy
Velocities ~ 1 m/s
At high velocities
Only on a few places
Power-rating ~ 10 kW and upp
Permanent magnets
Bio-fuelled plants
Process
Turbogenerator
Drawbacks:
Cooling is expensive
Our approach:
High voltage
136 kV / 42 MW
Why high voltage?
Poynting’s theoremThe rate at which electromagnetic energy isdissipated into heat per unit volume
tJ
t
f
f
DH
B
BE
D
0
EJ fw V fVloss dwdW EJ
V V fS
ddt
d
EJBE
εaHE22
22
HES Poynting vector
Trad XLPEE(kV/mm) 2.5 - 3 3 - 15A/mm 4 – 4.5 1.5 – 3P/mm 10-13.5 4.5 - 45
2
3
Buoy
Rope
Linear generator
Wave energy – The linear generator
Rotor
Stator
Current
Neodymium-Iron-Boron magnets Threephse winding, standardcable
Wind energy
GeneratorIncrease overload capabillity
Hydropower
-elliptic rotor- Eccentric rotor
Pulsed power
High power pulses: 100MW – 10TW during a few microseconds
80 KV5.5 kA0.5 GW2.5 micro seconds