Greetings,
I am working on verifing impedence data for a large number of transmission transformers. The data is being used in a GE PSLF powerflow model of a large transmission nework.
I would like to develop quick way to flag any bad data. In the interest of time, I can't go pull the test report info for 500+ transformers. Besides, some of these units are 80+ years old and no test report data exists.
The transformers vary in size from 1 MVA generator step up units to large 1000+ MVA 500/230 kV units.
What are reasonable values for R and X?
How does R and X vary with transformer size?
What about X/R ratio?
I imagine that turns ratio would also affect these values.
I look forward to your response!
Thanks
I am working on verifing impedence data for a large number of transmission transformers. The data is being used in a GE PSLF powerflow model of a large transmission nework.
I would like to develop quick way to flag any bad data. In the interest of time, I can't go pull the test report info for 500+ transformers. Besides, some of these units are 80+ years old and no test report data exists.
The transformers vary in size from 1 MVA generator step up units to large 1000+ MVA 500/230 kV units.
What are reasonable values for R and X?
How does R and X vary with transformer size?
What about X/R ratio?
I imagine that turns ratio would also affect these values.
I look forward to your response!
Thanks