basghari
Electrical
- Oct 16, 2006
- 1
Hi everybody,
I'm trying to write some codes to simulate a 30MVA, 138kV three-phase three-winding transformer. For writing a simulation program similar to BCTRAN in EMTP, positive and zero sequence short circuit impedances of transformer in addition to its magnetic curve are needed. Since the code will be revised later, I just need a very rough estimate of these values so that my results seem reasonable. I have looked all over the web, IEEE standards and different textbooks but with no success to find any typical values for these impedances. Can anybody tell me to where to look for these values?