reactive current inrush on induction generators
reactive current inrush on induction generators
(OP)
Hi,
Could anyone tell me why does induction generators, like those installed on wind turbines,draw large reactive currents following a fault at its terminal ?
Thanks in advance.
Could anyone tell me why does induction generators, like those installed on wind turbines,draw large reactive currents following a fault at its terminal ?
Thanks in advance.






RE: reactive current inrush on induction generators
Power factor of faults is usually very low meaning there will be a lot of reactive power required. This is nearly always true and is not unique to induction generators.
Induction generators in normal operation require a lot of reactive power for excitation.
RE: reactive current inrush on induction generators
My question was of course large reactive currents of induction generators during faults. I just read in a paper that in some cases, caps are unable to support reactive power requirement of induction generators during faults. So dpc, you said that power factor is very low during a fault, isn't there a physical explanation to that ?
RE: reactive current inrush on induction generators
Actually, the load impedance is still there, but it is being shunted by the fault.
I think the paper may have been referring to external faults, not faults in the generator.
Induction generators will never be able to provide reactive power - they consume reactive power.
RE: reactive current inrush on induction generators
RE: reactive current inrush on induction generators
RE: reactive current inrush on induction generators
RE: reactive current inrush on induction generators
If the synchronous generator gets its excitation power from the ac mains (such as with a static exciter), it can also experience voltage collapse for very close faults.
RE: reactive current inrush on induction generators