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 | File = {'path.name'} | ||||
L-C units in EMTP (.pun) file | The units from the pun file can be selected from the two options: | L-C units = { 0, 1} | ||||
mH/km, uF/km {0} | Inductance (L), capacitance (C) | |||||
Ohm/km, uS/km {1} | Inductive reactance (Xl) and capacitive susceptance (1/Xc) | |||||
Line Length | The length of the line | km | length = {0, 1e64} | |||
R | Per unit length resistance for each phase (mode) | Ω/km | R = {'-1e64, 1e64'} | |||
L | Per unit length inductance for each phase (mode) | H/km | L = {'-1e64, 1e64'} | |||
C | Per unit length capacitor for each phase (mode) | F/km | C = {'-1e64, 1e64'} | |||
Base power (per phase) | Base value for PU conversion | MVA total | 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] } | |||
Continuously transposed line | Transposition (Untransposed/Transposed) | transp = { 0, 1} | ||||
No {0} | Untransposed line | |||||
Yes {1} | Transposed line | |||||
Transformation matrix | Transformation matrix between mode current and phase current ([Iphase] = [Ti] x [Imode]); not used in the case of transposed line. | Ti = { [-1e64, 1e64] } |
Line Generator
Ports, Inputs, Outputs and Signals Available for Monitoring
Ports
This component supports a 12-phase transmission line
Name | Description |
---|---|
net_1_1(a,b,c) | Network connection of phases (a,b,c) of the left (+) side of line 1 |
net_1_2(a,b,c) | Network connection of phases (a,b,c) of the right side of line 1 |
net_2_1(a,b,c) | Network connection of phases (a,b,c) of the left (+) side of line 2 |
net_2_2(a,b,c) | Network connection of phases (a,b,c) of the right side of line 2 |
net_3_1(a,b,c) | Network connection of phases (a,b,c) of the left (+) side of line 3 |
net_3_2(a,b,c) | Network connection of phases (a,b,c) of the right side of line 3 |
net_4_1(a,b,c) | Network connection of phases (a,b,c) of the left (+) side of line 4 |
net_4_2(a,b,c) | Network connection of phases (a,b,c) of the right side of line 4 |
Inputs
None
Outputs
None
Sensors
At acquisition, the signals available by the sensors are:
Name | Description | Unit |
---|---|---|
V(a,b,c)1_Node1_(1,2) | Bus voltage for each phase (a,b,c) of line 1 | V |
V(a,b,c)2_Node2_(1,2) | Bus voltage for each phase (a,b,c) of line 2 | V |
V(a,b,c)3_Node3_(1,2) | Bus voltage for each phase (a,b,c) of line 3 | V |
V(a,b,c)4_Node4_(1,2) | Bus voltage for each phase (a,b,c) of line 4 | V |
I(a,b,c)1_Node1_(1,2) | Current for each phase (a,b,c) of line 1 | A |
I(a,b,c)2_Node2_(1,2) | Current for each phase (a,b,c) of line 2 | A |
I(a,b,c)3_Node3_(1,2) | Current for each phase (a,b,c) of line 3 | A |
I(a,b,c)4_Node4_(1,2) | Current for each phase (a,b,c) of line 4 | A |
The (1,2) in the previous table indicates the name of the bus at each end of the line (1 for left (+) side and 2 for the right side)
Electrical Parameters
Calculation of electrical parameters
The calculation of the electrical parameters for a CP line can be done with the Line Data auxiliary module. The pun file generated with this module must be loaded in the form. Alternatively, the electrical parameters Electrical parameters of CP lines can be calculated by using the HyperView Line Tab module in HyperView.
Steps are as follows:
.
To transfer the electrical parameters to the CP model, follow these steps:
Propagation Delay
The propagation delay is calculated as follows:
Mathblock | ||
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Propagation\_delay = length\_of\_line * \sqrt {L[i] * C[i] } |
Where i is for each of the phases, L and C stands for the inductance and capacitance of the line per unit length.
Background Color | ||
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When the propagation delay is smaller than the time step, the Constant Param block is automatically replaced by an equivalent PI Line. |
If the 'Transposed' parameter is set to 'yes', the following warning is printed in the console:
WARNING in line: <Name of Block>: The propagation delay ( X ) is less than the sample time ( Y ). A PI line is automatically used.
If the 'Transposed' parameter is set to 'no', an error message with similar text appears.
Reference
- H. W. Dommel, "Digital computer solution of electromagnetic transients in single and multiphase networks," IEEE Trans. Power App. Syst., vol. pas-88, pp. 388-99, 04/ 1969.