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Can PSSE be used for CT sizing?

asked 2013-09-03 20:50:57 -0500

amaity gravatar image

updated 2013-09-05 10:24:22 -0500

Can PSSE be used for current transformer sizing of a line/generator bay in a switchyard? What are the applicable API and what would be the general procedure to approach the problem.

The idea is to determine the transient performance of the CT. As per the IEEE PSRC report and elsewhere, the highest offset (DC component) of the fault current has to be estimated. The question is - what would be the best way of estimating this DC offset in PSSE, is the BKDY routine appropriate? Can a dynamic simulation give what is required, if so how?

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PSSE cannot be directly used for this purpose. However, you could set up a power flow and use the values it generates to help size the CT. Can you be more specific regarding what info you're looking for?

jsexauer gravatar imagejsexauer ( 2013-09-04 09:18:39 -0500 )edit

@jsexauer I have edited the question. I hope I have been able to convey what I want.

amaity gravatar imageamaity ( 2013-09-04 20:34:03 -0500 )edit

@amaity Thanks, much clearer. Using PSSE for dynamics is outside of my area of expertise, hopefully someone else can help you.

jsexauer gravatar imagejsexauer ( 2013-09-05 09:25:13 -0500 )edit

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answered 2020-07-26 20:00:53 -0500

IEC60909 method provids DC compoent in PSS(R)E. However, for CT caclulation, the selection is much more related to saturation, so had better use EMT software to check.

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Asked: 2013-09-03 20:50:57 -0500

Seen: 150 times

Last updated: Jul 26