Description
The PI line model is mainly used for short transmission lines. The equivalent circuit is shown below.
It is assumed that the capacitance on both sides are identical. The RL branches are also coupled.
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Mask and Parameters
General Parameters
Name | Description | Unit | Variable = {Possible Values} | |||
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Description | Use this field to add information about the component | |||||
Description = {'string'} | ||||
EMTP (.pun) file for line parameters calculation | The location (path) of the EMTP file (pun file) containing the line parameters. However, the EMTP “.pun” format is not allowed with this model | |||
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File = {'path.name'} | ||||||
Type | The line data can be taken using Matrix or Sequence parameters | Matrix/Sequence = { 0, 1} | ||||
|---|---|---|---|---|---|---|
Matrix {0} | Untransposed line. The data is filled in the matrices | |||||
Sequence {1} | Transposed line. The data is filled in the sequences | |||||
Line Length | The length of the line | km | length = {0, 1e64} | |||
Base power (perPhase) | Base value for PU conversion | MVA per phase | ||||
pBase = { [1, 1e64] } | |||||
Base voltage (rmsLN) | Base value for PU conversion | kV rms LN | |||
|---|---|---|---|---|---|
vBase = { [1, 1e64] } | |||||
Base frequecy | Base value for PU conversion | Hz | |||
|---|---|---|---|---|---|
fBase = { [1, 1e64] } |
Matrix Parameters
Name | Description | Unit | Variable = {Possible Values} | |||
|---|---|---|---|---|---|---|
Resistance - R | Resistance matrix | Ω/km | ||||
R = {'-1e64, 1e64'} | ||||||
Inductance - L | Inductance matrix | H/km | L = {'-1e64, 1e64'} | |||
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Capacitance - C | Capacitance matrix | F/km | C = {'-1e64, 1e64'} | |||
Sequence Parameters
Name | Description | Unit | Variable = {Possible Values} | |||
|---|---|---|---|---|---|---|
R | Resistance value for Zero and Positive sequences | Ω/km | ||||
Rseq = {'-1e64, 1e64'} | ||||||
L | Inductance value for Zero and Positive sequences | H/km | Lseq = {'-1e64, 1e64'} | |||
|---|---|---|---|---|---|---|
C | Capacitance value for Zero and Positive sequences | F/km | Cseq = {'-1e64, 1e64'} | |||
Line Generator
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For more information see Line Generator |
Calculation of Electrical Parameters
The EMTP “.pun” format is not allowed with this model. However, the electrical parameters of PI lines can be calculated by using the Line Generator Tab.
Ports, Inputs, Outputs and Signals Available for Monitoring
Ports
This component supports a 3-phase transmission line
Name | Description |
|---|---|
net_1(a,b,c) | Network connection of phases (a,b,c) of |
the left (+) |
side | |
net_2(a,b,c) | Network connection of phases (a,b,c) of |
|---|
the right |
side |
Inputs
None
Outputs
None
Sensors
At acquisition, the signals available by the sensors are:
Name | Description | Unit |
|---|---|---|
I1(a,b,c) | Current in each phase at left (+) end | A |
I2(a,b,c) | Current in each phase at right end | A |
Calculation of Electrical Parameters
The EMTP “.pun” format is not allowed with this model. However, the electrical parameters of PI lines can be calculated by using the HyperView Line Tab module in HyperView.
Steps are as follows:
- Load a file into the Line Data GUI or enter the geometrical line parameters; details are found in Line Geometry.
- Select the transposition options
- Run the program
- The electrical parameters are displayed in the Line Data Report.
To transfer the electrical parameters to the PI model, follow these steps: