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Subtransient Reactance of Generator

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HamidEle

Electrical
Feb 20, 2007
309
Who know the subtransient reactance data of 35MW generators? Thanks in advance.
 
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Hydro unit, gas turbine, or steam? rpm or # of poles? Hz? Manufacturer?

Typical values 0.12 - 0.25 for 2-pole machines.
 
It is a Hydro typo. 50HZ
poles? Manufacturer? I don't know.

We are working on an international project based on Guesses, which is driving me nuts.
 
I think that is something you are going to have to get from the manufacturer. Do you have any hints or clues to who that might be?

rmw
 
On a 50Hz 4 pole generator 1500rpm (diesel)400/231vac up to 2.5mW we use 0.8.
 
There is a table of typical values in Chapter 5 of the Areva PRAG. ftp://ftp.areva-td.com/NPAG/Chap5-46-77.pdf
Regards
Marmite
 
Who know the subtransient reactance data of 0.556MVA generators? and where can ? find these values of generators from? thanks
 
Sub-transient, Transient & steaDY STATE reactance of machines are dependent on macine size.

Medium size machine:-

Subtransient Reactance = 0.16 to 0.24
Transient Reactance = 0.2 to 0.28
Synhronous reactance = 2.25 to 3.0

Synchronous reacance value is inversly proportional to short circuit ratio of machine. For example SC Raio = 0.4 then Xs = 1/0.4 = 2.5

Thanks
 
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