How is the stator resistance of a synchronous generator calculated (for application in short-circuit studies)?

[Magic Gorge]

Given a generator set data sheet, I've often used this info from SKM as a quick reference for the necessary inputs: https://www.skm.com/Synchronous_Generator_Input_Data.html

However, sometimes the given stator resistance (0.0023 ohms in that example) is not quantified in the same way. In the attached screenshot, the line-line stator resistance values are shown. I believe the high wye connection most resembles the low impedance condition when susceptible to high faults, however is there more to consider for this "stator resistance" value?

 

[paulengr]

IEEE 112 gives the standard procedure for converting the data sheets into the equivalent circuit model. With induction motors/generators things are consistent enough that if it follows NEMA MG-1 you can estimate everything using a procedure in an IEEE article. But this doesn’t work with sync motors.

 

[Julius Right]

High wye connection it could be as following:

https://www.marathongenerators.com/generators/docs/manuals/Connection%20Diagrams.pdf

 

[Julius Right]

I'm sorry to disappoint you but this standard -IEEE 112- is not for synchronous generators but only for induction generators- as I understand it.