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 | 1 | initial version |
If your comparison is showing significantly different results, it may be worth double checking whether you're using FLAT settings in ASCC for your comparison, and that you're using the same type of machine source impedance.
The program application guide might help to shed some light your first question - for PSSE v34.8.3 section 11.4 covers how fault currents are calculated for ASCC.
Regarding your second question about the specific algorithms used, section 11.4 doesn't go into detail. It's possible that at that level of detail, intellectual property may be a concern?
For the third question, two conceptual algorithms that can be used to construct Z bus for faults are Lower/Upper triangular matrix decomposition, and 'bus building' where the Sherman-Morrison formula is used to iteratively increase the dimension of a reduced Zbus until the whole network is accounted for.
| | 2 | No.2 Revision |
If your comparison is showing significantly different results, it may be worth double checking whether you're using FLAT settings in ASCC for your comparison, and that you're using the same type of machine source impedance.
The program application guide might help to shed some light your first question - for PSSE v34.8.3 v34.8.2 section 11.4 covers how fault currents are calculated for ASCC.
Regarding your second question about the specific algorithms used, section 11.4 doesn't go into detail. It's possible that at that level of detail, intellectual property may be a concern?
For the third question, two conceptual algorithms that can be used to construct Z bus for faults are Lower/Upper triangular matrix decomposition, and 'bus building' where the Sherman-Morrison formula is used to iteratively increase the dimension of a reduced Zbus until the whole network is accounted for.
