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PI Lines and PI Lines with Fault
In order to simplify the text, the PI line sections are called PI lines in this Chapter.
Introduction
The PI line model is mainly used for short transmission lines. See equivalent diagram on Figure
7 - 29.
PI Line Icon and Diagram
Parameter Description
General Parameters
Base MVA | Base power in MVA |
Base Volt | Line base voltage - phase to ground kV |
Base Freq | Base frequency (Hz) |
Length | Line length (km) |
Database key name | Key to access the line data base (optional package). |
EMTP Geometric parameters
Fault/file | to reset values / calculation of parameters |
File name | EMTP or Inpurdue format file containing the geometric parameters of the lines. The EMTP “.pun” format is not allowed with this model. |
RLC Parameters--Matrix/Sequences
Matrix (untransposed line | fill in the matrices |
Sequences (transposed line | fill in the sequences |
R, L, C | R, L, C matrices (ohm/km, henry/km, farad/km) |
Sequence 0 | Zero sequence |
Sequence 1 | Positive sequence |
Fault Parameters
The fault parameters are exactly the same as those for constant parameters lines. For more details,
see 3– on page 144.
List of Available Signals
At acquisition, the following signals are made available by the sensors:
Line Signals
I1(a,b,c)_bus label | Current in each phase at end 1 |
I2(a,b,c)_bus label | Current in each phase at end 2 |
Fault Signals
V(a, b, c)_FLT_line label | Voltage on fault bus (volt) |
I(a, b, c, n)_FLT_line label | Fault current (ampere) |
CMD(a, b, c, n)_FLT_line label | Command for states of phase and ground breakers |
PI Lines Control Panels
Line Data
The geometric data shown in Figures 7 - 6 to 7 - 7 are used to calculated a PI line.
Load File
An EMTP file that contains the physical parameters of the lines (Fig 7 - 2 and 7 - 3) or the resolve matrix by the external software of EMTP can be loaded automatically in the parameter form. Calculation of Electrical Parameters and Corresponding Control Panel
Calculation of Electrical Parameters
The calculation of electrical parameters of frequency constant parameter lines with their geometric parameters is done by using the Line Generator module in the mask of the line. Figure 7 - 9 shows the relevant part of the geometrical parameters.
- Load a file into the Line Generator tab or enter your geometrical line parameters.
- Select the transpositions options.
- Run the program.
- The electrical parameters are displayed in the Line Data report.
Transfer Electrical Parameters to HYPERSIM® Lines
The transfer of electrical parameters to HYPERSIM® is very simple.
- In HYPERSIM® GUI, edition mode, draw a network with lines.
- Go to the Line Generator tab, in the mask of your line.
- To transfer electrical parameters, enter the parameters line.
- Load parameters and Apply.
- See the parameters in the report log.
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