Table of Contents  


Library
ARTEMiS/SSN/Lines
Blocks
Description
The SSN Distributed Parameters Line with Fault block implements a Bergeron's travelling wave line with losses, also known as CPline in EMTPRV, with a fault at the middle. The model actually implements two DPL lines in series with an internal midpoint faults at a distance specified by the user. The fault type and distance can be changed during online simulation, without the need to recompile the model.
Exact loss repartition on each side of the fault
The model uses SSN UCB[1] to dynamically modify the surge impedance of the line according to the fault distance, including an exact distribution of losses between on both side of the fault. While the previous ARTEMiS Distributed Parameters Line with Variable Internal Fault Distance (ADPLF) had to approximate and fix the losses 50/50 on both side of the fault without regards to the fault location, this new SSN Distributed Parameters Line with Fault model does not make such an approximation and losses are dynamically reattributed, without approximation, to each side of the fault.
Masks
Parameters
Number of phases N: Currently, only 3phase lines are supported
Frequency used for RLC specifications: Specifies the frequency used to compute the resistance R, inductance L, and capacitance C matrices of the line model.
Resistance per unit length: The resistance R per unit length, as an NbyN matrix in ohms/km. For a symmetrical line, you can either specify the NbyN matrix or the sequence parameters. For a twophase or threephase continuously transposed line, you can enter the positive and zerosequence resistances [R1 R0]. For a symmetrical sixphase line you can set the sequence parameters plus the zerosequence mutual resistance [R1 R0 R0m]. For asymmetrical lines, you must specify the complete NbyN resistance matrix.
Inductance per unit length: The inductance L per unit length, as an NbyN matrix in henries/km (H/km). For a symmetrical line, you can either specify the NbyN matrix or the sequence parameters. For a twophase or threephase continuously transposed line, you can enter the positive and zerosequence inductances [L1 L0]. For a symmetrical sixphase line, you can enter the sequence parameters plus the zerosequence mutual inductance [L1 L0 L0m]. For asymmetrical lines, you must specify the complete NbyN inductance matrix.
Capacitance per unit length: The capacitance C per unit length, as an NbyN matrix in farads/km (F/km). For a symmetrical line, you can either specify the NbyN matrix or the sequence parameters. For a twophase or threephase continuously transposed line, you can enter the positive and zerosequence capacitances [C1 C0]. For a symmetrical sixphase line you can enter the sequence parameters plus the zerosequence mutual capacitance [C1 C0 C0m]. For asymmetrical lines, you must specify the complete NbyN capacitance matrix.
Line length: The line length, in km. This length is the total length of the line, not the individual length of the 2 line sections used by the model.
Input and Output signals
Simulink connection points
Fault distance ratio: The distance of the fault from the (Capital) ABC terminal in PU.
Fault: The fault is activated when this input equals 1.
Fault params: Fault type selection (ABCG, AB, etc…). Normally connected to an OpElectricFaultSelector block for easy configuration.
Physical Modeling connection points
Electric ports: Each side of the line is electrically connected with ABC and abc ports on each side.
Examples
The demo model ssn_VariableFaultDPL.slx compares the SSN Distributed Parameters Line with Fault with 2 standard DPL and middle fault, with a fault distance of 0.2 PU (from the ABC terminal). A 1cycle (60Hz) ABCtoground fault is applied after 5 cycles of simulation. All signals match perfectly between the SSN Distributed Parameters Line with Fault and the reference model; the input current and endphase voltage are perfectly superposed.
References
[1] C. Dufour, J. Mahseredjian , J. Bélanger, “A Combined StateSpace Nodal Method for the Simulation of Power System Transients”, IEEE Transactions on Power Delivery, Vol. 26, no. 2, April 2011 (ISSN 08858977), pp. 928935