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PI Section, 12-ph with Fault
- Sylvain Ménard
- Victoria Bruny
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 is identical. The RL branches are also coupled. The parameters for the 12-phase PI lines are the same as those for 3-phase PI lines, except that the dimension of the R, L and C matrices representing the impedance and admittance of the conductors is 12x12, instead of 3x3. The 12-phase PI model represents four 3-phase transmission lines in parallel.
In this model, there is a new parameter for sequences. The neutral coupling between the four line circuits (mutual impedance) is represented only in zero sequence.
This model can be used to simulate an internal fault. However, the number of operations allowed in this model is four (4) per fault element, instead of ten (10) in normal cases.
Mask and Parameters
General Parameters
Name | Description | Unit | Variable = {Possible Values} | |||
|---|---|---|---|---|---|---|
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 | File = {'path.name'} | ||||
Line 1 | Fault distance from (+) side (Line 1) | km | fault_loc1 = {0, 1e64} | |||
Line 2 | Fault distance from (+) side (Line 2) | km | fault_loc2 = {0, 1e64} | |||
Line 3 | Fault distance from (+) side (Line 3) | km | fault_loc3 = {0, 1e64} | |||
Line 4 | Fault distance from (+) side (Line 4) | km | fault_loc4 = {0, 1e64} | |||
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 frequency | Base value for PU conversion | Hz | fBase = { [1, 1e64] } | |||