3-Phase Short Circuit¶
First, declare an array of zeros of size equal to the number of nodes in the circuit.
Then, compute the short circuit current at the selected bus and assign that value in the position of the array .
Then, compute the voltage increment for all the circuit nodes as:
Finally, define the voltage at all the nodes as:
Magnitudes:
- : Array of fault currents at the system nodes.
- : Array of system voltages prior to the failure. This is obtained from the power flow study.
- : Impedance of the failure itself. This is a given value, although you can set it to zero if you don’t know.
- : system impedance matrix. Obtained as the inverse of the complete system admittance matrix.