# Equivalent two-phase to ground fault admittances at Transmission nodes

Does anyone know what is "Equivalent two-phase to ground fault admittances at Transmission nodes"? How can I find it? Or how can I add it? Thank you!!

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It can be calculated with SCMU if your case includes sequence data.

See calculation with savnw.sav below. The equivalent impedance is shown at the bottom of the report.

     PTI INTERACTIVE POWER SYSTEM SIMULATOR--PSS(R)E     SUN, OCT 08 2017  21:19
PSS(R)E PROGRAM APPLICATION GUIDE EXAMPLE
BASE CASE INCLUDING SEQUENCE DATA

UNBALANCES APPLIED:

LINE TO LINE TO GROUND FAULT AT BUS 151 [NUCPANT     500.00]   EXCLUDED PHASE 1
L-L Z = (0.0,0.0)   L-G Z = (0.0,0.0)

SEQUENCE THEVENIN IMPEDANCES AT FAULTED BUSES

BUS# X-- NAME --X BASKV          ZERO              POSITIVE            NEGATIVE
151 NUCPANT     500.00    0.00017  0.00600    0.00409  0.01765    0.00409  0.01765

LINE TO LINE TO GROUND FAULT AT BUS    151 [NUCPANT     500.00]:

SEQUENCE              RE(V0)    IM(V0)    RE(V+)    IM(V+)    RE(V-)    IM(V-)   RE(3V0)   IM(3V0)
PHASE                 RE(VA)    IM(VA)    RE(VB)    IM(VB)    RE(VC)    IM(VC)

151 (P.U.)         0.1930    0.0618    0.1930    0.0618    0.1930    0.0618    0.5790    0.1853
NUCPANT     500.00    0.5790    0.1853    0.0000    0.0000    0.0000   -0.0000

SEQUENCE              RE(I0)    IM(I0)    RE(I+)    IM(I+)    RE(I-)    IM(I-)   RE(3I0)   IM(3I0)
PHASE                 RE(IA)    IM(IA)    RE(IB)    IM(IB)    RE(IC)    IM(IC)

FROM    101 CKT 1    -4.8519   14.0850    9.0619   -8.6127   -0.8115    2.3904  -14.5557   42.2551
NUC-A       21.600    3.3986    7.8627  -18.5060    8.6456    0.5518   25.7468

FROM    102 CKT 1    -4.8519   14.0850    9.0619   -8.6127   -0.8115    2.3904  -14.5557   42.2551
NUC-B       21.600    3.3986    7.8627  -18.5060    8.6456    0.5518   25.7468

FROM    152 CKT 1    -0.2046    0.4339   -1.1123   -5.6030   -0.8804    0.6515   -0.6139    1.3016
MID500      500.00   -2.1973   -4.5177   -4.6248    3.1104    6.2082    2.7088

FROM    152 CKT 2    -0.2046    0.4339   -1.1123   -5.6030   -0.8804    0.6515   -0.6139    1.3016
MID500      500.00   -2.1973   -4.5177   -4.6248    3.1104    6.2082    2.7088

FROM    201 CKT 1    -1.0921    2.8011    1.4018  -14.1772   -1.9712    2.3697   -3.2762    8.4034
HYDRO       500.00   -1.6615   -9.0063  -15.1374    5.7838   13.5227   11.6259

SUM OF CONTRIBUTIONS INTO BUS    151 [NUCPANT     500.00]:

151              -11.2051   31.8389   17.3011  -42.6085   -5.3549    8.4534  -33.6154   95.5168
NUCPANT     500.00    0.7411   -2.3161  -61.3992   29.2958   27.0426   68.5371

CONTRIBUTIONS EQUIVALENT POSITIVE SEQUENCE ADMITTANCE   17.2353 -226.2707 PU
1723.53 -22627.07 MVA

SHUNT + LOAD CURRENT AT BUS    151 [NUCPANT     500.00]:

151                0.0000    0.0000    0.3706   -1.1581    0.3706   -1.1581    0.0000    0.0000
NUCPANT     500.00    0.7411   -2.3161   -0.3706    1.1581   -0.3706    1.1581

FAULT CURRENT AT BUS    151 [NUCPANT     500.00]:

151 ...
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