Calculating X/R for AC generator
Calculating X/R for AC generator
(OP)
All,
Using SKM, I'm trying to model an older EMD AC generator. Its data sheet does not list X/R but does give me numerous other parameters:
AB21-6 Model
60Hz
900rpm
2190kW
2738kVA
0.8PF
600VAC Delta
2634A
xd 1.12
xq 0.67
xd' 0.28
xd" 0.19
x2 0.16
xo ---
Tdo' 4.34
Td" 0.023
Td' 1.02
Ta 0.044
Does anyone know either a direct derivation or indirect estimation that would allow determination of X/R from the time constants? Thanks much for any help!
Using SKM, I'm trying to model an older EMD AC generator. Its data sheet does not list X/R but does give me numerous other parameters:
AB21-6 Model
60Hz
900rpm
2190kW
2738kVA
0.8PF
600VAC Delta
2634A
xd 1.12
xq 0.67
xd' 0.28
xd" 0.19
x2 0.16
xo ---
Tdo' 4.34
Td" 0.023
Td' 1.02
Ta 0.044
Does anyone know either a direct derivation or indirect estimation that would allow determination of X/R from the time constants? Thanks much for any help!






RE: Calculating X/R for AC generator
RE: Calculating X/R for AC generator
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Calculating X/R for AC generator
As Ta=x2[ohm]/2/pi()/frq/ra [sec]
ra=x2[ohm]/2/pi()/frq/Ta [ohm]
x2[ohm]=x2*U^/S
U=0.6 kV
S=2.738 MVA
frq=60
ra=0.001268 ohm
ra=stator [star] resistance
rdelta=3*ra
rdelta=3*0.001268=0.0038 ohm