Question on PSSE terminology

asked 2020-07-30 15:45:23 -0500

Jbaker
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Can someone explain the term ZSORCE, XTRAN, GENTAP please?

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answered 2020-07-31 03:07:29 -0500

perolofl

3212 ●1 ●8 ●18

For a synchronous generator XSORCE is the subtransient reactance, Xd”.

XTRAN and GENTAP are only used if the step-up transformer is not modelled in load flow, i.e. the generator is connected directly at the high tension side.

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Thank you. Do you mean XTRAN and GENTAP are only used if the step-up transformer is modeled in load flow? Above you said is not

Jbaker ( 2020-08-04 13:17:06 -0500 )edit

No, I mean what I wrote. You can ignore XTRAN and GENTAP if the step-up transformer is modelled in the saved case. If so, the transformer is already modelled and there is no need to enter the data in the machine record.

perolofl ( 2020-08-07 04:17:49 -0500 )edit

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answered 2020-08-05 04:44:34 -0500

lmcqueen
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Using XTRAN and GENTAP means you are modeling the generator step-up transformer implicitly (i.e. unit-connected). See the Program Operation Manual for more information.

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answered 2020-07-30 18:17:39 -0500

JbFord
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p.u Generator Dynamic Impedance, ZSORCE p.u. impedance XTRAN = RT, XT on machine MVA base p.u. off-nominal turns ratio (GENTAP) entered in the machine impedance