How to trip one winding in a 3-winding transformer?

asked 2015-10-09 14:19:30 -0500

lhmus
3 ●1 ●1 ●3

updated 2015-10-15 08:43:55 -0500

Hello,

I can trip one winding for a 3-winding transformer in PSS/E. I checked the API manual. THREEWNDIMPEDCHNG3 has a parameter, intergar8, for resetting the transformer status but only 0 and 1 for out-service and in-service options. Is it possible just to trip one winding for a 3-winding transformer?

Thanks!

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answered 2016-09-19 08:20:52 -0500

perolofl

2947 ●1 ●8 ●16

The API manual is not complete. Parameter INTGAR(8) can be set to openan individual winding: 0 = out of service, 1 = in service at all windings, 2 = winding 2 is open, 3 = winding 3 is open, 4 = winding 1 is open.

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Correct!!!

lhmus ( 2016-10-03 10:00:00 -0500 )edit

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answered 2015-10-16 12:43:57 -0500

jconto
2601 ●10 ●30 ●40

You can 'open' a single winding of a three-winding transformer by:

Insert a zero-impedance line between each winding and the network bus.
solve the load flow
now, open one of the zero-impedance to simulate the 'single winding opening' condition.
solve again, and continue with your analysis.

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answered 2015-10-23 10:42:16 -0500

lhmus
3 ●1 ●1 ●3

updated 2015-10-23 10:44:03 -0500

Thank jconto! Need to replace the three buses on the 3-winding xfmr with three new buses, then connect them to their network bus with a ZBR. That is what I do. Any other method for sharing?

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How to trip one winding in a 3-winding transformer?

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