For more details on p-sections, see PI-Sections (Single Circuit).
There are couple of subtle differences between the double-circuit and the single-circuit p-section components, as described below:
Double-Circuit P-Section supports only the 'Coupled' model (i.e. does not support 'Nominal' model).
Mutual data between the two, 3-phase circuits must be entered.
The R,Xl,Xc Data (pu) and the R,X,B Data (pu) parameter pages have been merged onto a single page.
More: |
Basic Overview Of Modeling Techniques Constructing Transmission Line Systems |
Main ConfigurationMain Configuration
T-Line Name |
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Text |
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Just an identifier. A name should be entered here to avoid compilation warnings |
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Enter Imped./Admit. Data in |
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Choice |
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Select R,Xl,Xc (pu), R,Xl,Xc (Ohms), Zsurge,Tau. or R,X,B (pu). This of course depends on the format of your data! |
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2 Circuits Are |
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Choice |
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Select Identical or Different. The two, 3-phase circuits may be identical or different. Mutual parameters still apply in either case. |
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Line Rated Frequency |
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REAL |
Constant |
Enter the system rated frequency [Hz]. |
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Line Length |
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Constant |
Enter the p-section line length [m]. |
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Enter 0 Seq. Data or Estimate |
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Choice |
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Select Enter or Estimate. Select Enter if you have the zero-sequence data. If not, you may estimate the zero-sequence by providing ratios in the Zero Sequence Estimation ParametersZero Sequence Estimation Parameters dialog. NOTE: These parameters are enabled only if Enter 0 Seq. Data or Estimate is selected as Estimate.
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Enter 0 Seq. Mutual Data, or Estimate: |
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Choice |
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Select Enter or Estimate. Same as above. |
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Graphics Display |
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Choice |
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Select 3 phase view or Single line view. |
Zero Sequence Estimation ParametersZero Sequence Estimation Parameters
NOTE: These parameters are enabled only if Enter 0 Seq. [Mutual] Data or Estimate is selected as Estimate.
0 Seq. R / +ve Seq. R |
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REAL |
Constant |
Enter the ratio of zero sequence resistance to positive sequence resistance |
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0 Seq. Z0 / +ve Seq. Z0 |
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REAL |
Constant |
Enter the ratio of zero sequence surge impedance to positive sequence surge impedance |
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0 Seq. Trav. Time / +ve Seq. TAU |
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REAL |
Constant |
Enter the ratio of zero sequence travel time to positive sequence travel time |
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0 Seq. Mut. R / 0 Seq. R (C. 1) |
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REAL |
Constant |
Enter the ratio of zero sequence, mutual resistance to the Circuit #1 zero sequence resistance |
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0 Seq. Mut. Z / 0 Seq. Z (C.1) |
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REAL |
Constant |
Enter the ratio of zero sequence, mutual impedance to the Circuit #1 zero sequence impedance |
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0 Seq. Mut. Tr. Time / 0 Seq. Tr. Time (C.1) |
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REAL |
Constant |
Enter the ratio of zero sequence, mutual travel time to the Circuit #1 zero sequence travel time |
NOTE: These parameters are enabled only if Enter Imped./Admit. Data in | R,Xl,Xc (pu) or R,X,B (pu) is selected.
Rated Voltage L-L |
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REAL |
Constant |
Enter the rated RMS line-to-line voltage [kV] |
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MVA for All Phases |
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REAL |
Constant |
Enter the total 3 Phase MVA [MVA] |
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+ve Seq. Resistance |
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REAL |
Constant |
Enter the positive sequence resistance [pu/m] |
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+ve Seq. Inductive Reactance |
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REAL |
Constant |
Enter the positive sequence inductive reactance [pu/m] |
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+ve Seq. Capacitive Susceptance |
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REAL |
Constant |
Enter the positive sequence capacitive susceptance [pu/m] NOTE: This parameter is enabled only if Enter Imped./Admit. Data in | R,X,B (pu) is selected. |
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+ve Seq. Capactive Reactance |
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REAL |
Constant |
Enter the positive sequence capacitive reactance [pu*m]. NOTE: This parameter is enabled only if Enter Imped./Admit. Data in | R,Xl,Xc (pu) is selected. |
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0 Seq. Resistance |
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REAL |
Constant |
Enter the zero sequence resistance [pu/m] |
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0 Seq. Inductive Reactance |
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REAL |
Constant |
Enter the zero sequence inductive reactance [pu/m] |
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0 Seq. Capacitive Susceptance |
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REAL |
Constant |
Enter the zero sequence capacitive susceptance [pu/m] NOTE: This parameter is enabled only if Enter Imped./Admit. Data in | R,X,B (pu) is selected. |
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0 Seq. Capactive Reactance |
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REAL |
Constant |
Enter the zero sequence capacitive reactance [pu*m] NOTE: This parameter is enabled only if Enter Imped./Admit. Data in | R,Xl,Xc (pu) is selected. |
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0 Seq. Mut. Resistance |
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REAL |
Constant |
Enter the zero sequence mutual resistance between circuits [pu/m] |
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0 Seq. Mut. Inductive Reactance |
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REAL |
Constant |
Enter the zero sequence mutual inductive reactance between circuits [pu/m] |
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0 Seq. Mut. Capacitive Susceptance |
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REAL |
Constant |
Enter the zero sequence mutual capacitive susceptance between circuits [pu/m] NOTE: This parameter is enabled only if Enter Imped./Admit. Data in | R,X,B (pu) is selected. |
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0 Seq. Mut. Capacitive Reactance |
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REAL |
Constant |
Enter the zero sequence mutual capacitive reactance between circuits [pu*m] NOTE: This parameter is enabled only if Enter Imped./Admit. Data in | R,Xl,Xc (pu) is selected. |
Per Unit Data - 2nd CircuitPer Unit Data - 2nd Circuit
NOTE: These parameters are enabled only if Enter Imped./Admit. Data in | R,Xl,Xc (pu) or R,X,B (pu) and 2 Circuits Are | Different is selected.
+ve Seq. Resistance |
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REAL |
Constant |
Enter the positive sequence resistance [pu/m] |
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+ve Seq. Inductive Reactance |
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REAL |
Constant |
Enter the positive sequence inductive reactance [pu/m] |
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+ve Seq. Capacitive Susceptance |
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REAL |
Constant |
Enter the positive sequence capacitive susceptance [pu/m] NOTE: This parameter is enabled only if Enter Imped./Admit. Data in | R,X,B (pu) is selected. |
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+ve Seq. Capactive Reactance |
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REAL |
Constant |
Enter the positive sequence capacitive reactance [pu*m] NOTE: This parameter is enabled only if Enter Imped./Admit. Data in | R,X,B (pu) is selected. |
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0 Seq. Resistance |
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REAL |
Constant |
Enter the zero sequence resistance [pu/m] |
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0 Seq. Inductive Reactance |
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REAL |
Constant |
Enter the zero sequence inductive reactance [pu/m] |
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0 Seq. Capacitive Susceptance |
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REAL |
Constant |
Enter the positive sequence capacitive susceptance [pu/m] NOTE: This parameter is enabled only if Enter Imped./Admit. Data in | R,X,B (pu) is selected. |
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0 Seq. Capactive Reactance |
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REAL |
Constant |
Enter the positive sequence capacitive reactance [pu*m] NOTE: This parameter is enabled only if Enter Imped./Admit. Data in | R,X,B (pu) is selected. |
R,Xl,Xc Data (ohms)R,Xl,Xc Data (ohms)
NOTE: These parameters are enabled only if Enter Imped./Admit. Data in is selected as R,Xl,Xc (Ohms).
+ve Seq. Resistance |
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REAL |
Constant |
Enter the positive sequence resistance [W/m] |
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+ve Seq. Inductive Reactance |
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REAL |
Constant |
Enter the positive sequence inductive reactance [W/m] |
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+ve Seq. Capactive Reactance |
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REAL |
Constant |
Enter the positive sequence capacitive reactance [MW*m] |
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Zero Sequence Resistance |
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REAL |
Constant |
Enter the zero sequence resistance [W/m] |
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Zero Seq. Inductive Reactance |
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REAL |
Constant |
Enter the zero sequence inductive reactance [W/m] |
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Zero Seq. Capactive Reactance |
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REAL |
Constant |
Enter the zero sequence capacitive reactance [MW*m] |
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0 Seq. Mutual Resistance |
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REAL |
Constant |
Enter the zero sequence mutual resistance [W/m] |
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0 Seq. Mut. Inductive Reactance |
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REAL |
Constant |
Enter the zero sequence mutual inductive reactance [W/m] |
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0 Seq. Mut. Capacitive Reactance |
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REAL |
Constant |
Enter the zero sequence mutual capacitive reactance [MW*m] |
R,Xl,Xc Data (ohms) - 2nd circuitR,Xl,Xc Data (ohms) - 2nd circuit
NOTE: These parameters are enabled only if Enter Imped./Admit. Data in is selected as R,Xl,Xc (Ohms) and 2 Circuits Are | Different is selected.
+ve Seq. Resistance |
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REAL |
Constant |
Enter the positive sequence resistance [W/m] |
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+ve Seq. Inductive Reactance |
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REAL |
Constant |
Enter the positive sequence inductive reactance [W/m] |
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+ve Seq. Capactive Reactance |
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REAL |
Constant |
Enter the positive sequence capacitive reactance [MW*m] |
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Zero Sequence Resistance |
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REAL |
Constant |
Enter the zero sequence resistance [W/m] |
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Zero Seq. Inductive Reactance |
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REAL |
Constant |
Enter the zero sequence inductive reactance [W/m] |
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Zero Seq. Capactive Reactance |
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REAL |
Constant |
Enter the zero sequence capacitive reactance [MW-m] |
Surge Impedance, Travel Time DataSurge Impedance, Travel Time Data
NOTE: These parameters are enabled only if Enter Imped./Admit. Data in is selected as Zsurge,Tau..
+ve Seq. Resistance |
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REAL |
Constant |
Enter the positive sequence resistance [W/m] |
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+ve Seq. Travel Time |
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REAL |
Constant |
Enter the positive sequence travel time [ms] |
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+ve Seq. Surge Impedance |
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REAL |
Constant |
Enter the positive sequence surge impedance [W] |
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0 Seq. Resistance |
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REAL |
Constant |
Enter the zero sequence resistance [W/m] |
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0 Seq. Travel Time |
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REAL |
Constant |
Enter the zero sequence travel time [ms] |
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0 Seq. Surge Impedance |
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REAL |
Constant |
Enter the zero sequence surge impedance [W] |
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0 Seq. Mutual Resistance |
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REAL |
Constant |
Enter the zero sequence mutual resistance [W/m] |
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0 Seq. Mutual Travel Time |
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REAL |
Constant |
Enter the zero sequence mutual travel time [ms] |
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0 Seq. Mutual Surge Impedance |
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REAL |
Constant |
Enter the zero sequence mutual surge impedance [W] |
Surge Impedance, Travel Time Data - 2nd circuitSurge Impedance, Travel Time Data - 2nd circuit
NOTE: These parameters are enabled only if Enter Imped./Admit. Data in is selected as Zsurge,Tau..
+ve Seq. Resistance |
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REAL |
Constant |
Enter the positive sequence resistance [W/m] |
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+ve Seq. Travel Time |
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REAL |
Constant |
Enter the positive sequence travel time [ms] |
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+ve Seq. Surge Impedance |
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REAL |
Constant |
Enter the positive sequence surge impedance [W] |
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0 Seq. Resistance |
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REAL |
Constant |
Enter the zero sequence resistance [W/m] |
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0 Seq. Travel Time |
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REAL |
Constant |
Enter the zero sequence travel time [ms] |
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0 Seq. Surge Impedance |
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REAL |
Constant |
Enter the zero sequence surge impedance [W] |