The fault specification file is a text file. The first line in the file must say:
[ASPEN SIMULTANEOUS FAULT SPECIFICATION VERSION NN]
NN is the program version number.
The rest of the file contains fault simulation data. If there are more than one fault simulations, there must be a blank line separating data section for each simulation.
A fault simulation can have up to 40 simultaneous faults, which are specified each line in the file. If the continuation string character “ /” (no quotes) is found at the end of a line, data on the line will be considered to be part of the next line.
Each fault specification contains following data fields separated by blank space:
1. FLTDESC: Fault description string enclosed in quotes. Description can have up to 127 characters.
2. PHASETYPE: Phase code. 1LG: Enter 0 for A; 1 for B; 2 for C. 2LG or LL: Enter 0 for A-B; 1 for B-C;
2 for C-A. Bus-to-Bus: Enter 0 for A-A; 1 for A-B; 2 for A-C; 3 for B-B; 4 for B-C; 5 for C-C.
3. FLTCONN: Fault connection code. Enter 0 for 3LG; 1 for 1LG; 2 for 2LG; 3 for L-L.
4. FLTAPPL: Fault application code. Enter 0 for bus fault; 1 for close-in fault; 2 for bus-to-bus fault; 3 for line-end fault; 4 for intermediate fault; 5 for branch outage; 6,7,8 for 1-, 2- and 3-phase open.
5. FPARAM: Intermediate fault location in percent.
6. FRA FXA FRB FXB FRC FXC FRG FXG: Resistance and reactance value of fault impedances Za, Zb, Zc and Zg per figure in section SPECIFY SIMULTANEOUS FAULT COMMAND. Fault impedance is not used when FLTAPPL is 5, 6, 7 or 8, in which case all values must be zero.
7. BUS1NAME: Name of first fault bus in quotes. Name can have up to 13 characters.
8. BUS1KV: Nominal kV of first fault bus in quotes. Name can have up to 13 characters.
Following data fields are required only if FLTAPPL is other than 0
9. BUS2NAME: Name of second fault bus in quotes. Name can have up to 13 characters.
10. BUS2KV: Nominal kV of second fault bus in quotes. Name can have up to 13 characters.
Following data fields are required only if FLTAPPL is other than 2
11. BRTYPE: Fault branch type code. Enter 1 for transmission line; 2 for 2-winding transformer; 3 for phase shifter; 7 for switch; 10 for 3-winding transformer.
12. CKTID: Faulted branch circuit ID.