Flashcards
Operational Aspects
Cards in this deck (14)
- 13 (+) of Induction Generator with squirrel cage1) simple
2) cheap
3) low maintenance for IM - 24 (-) of Induction Generator with Squirrel Cage1) reactive power needed from grid
2) shaft speed almost constant, no MPPT
3) generator must work
oversynchronuous to produce power
4) gearbox - losses + maintenance - 32 (+) Induction generator with slip rings1) limited speed control
2) primitive MPPT control - 43(-) Induction generator with Slip Rings1) more expensive machine
2) losses in resistors
3) slip rings - maintenance - 5(4) Facts about Doubly Fed Induction Generator (DFIG)(1) Rotor power can be bidirectional
2) Many possible control algorithms
3) Power converter: between 0 and 30%
of total power
4) Reactive power compensation until
cos phi = 1 - 64(+) of Doubly Fed Induction Generator (DFIG)1) more speed control
2) MPPT possible
3) rotor power is useful
4) cos phi = 1 - 72 (-) of Doubly fed induction generator1) cost and complexity of converter
2) slip rings - maintenance - 8(4) facts about synchronuous generator1) SG with excitation windings or magnets
2) high-pole count machines avoid gearbox
3) converter for full power now possible
4) MPPT possible over large speed range
with DC/DC chopper - 94 (+) of Synchronuous generator1) no gearbox or slip rings
2) large speed range
3) MPPT over large range
4) high total efficiency - 102 (-) of Synchronuous Generator1) expensive machine (magnets)
2) large rated power for converter - 112 (+) passive diode rectifier1) simple and cheap
2) reliable - 122 (-) passive diode rectifier1) current harmonics
2) low power factor - 132 (+) active rectifiers1) good waveforms of current
2) torque control possible (e.g. field orientation) - 143 (-) active rectifiers1) switching losses
2) complex circuit, thus more expensive
3) complex control
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- Flashcards on Operational Aspects, created by Julie Devlies on 02/06/2024.
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- Julie Devlies
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