Hi Guys,
Basically this is can be seen for deep faults in PSSE that voltage at the bus that fault was applied will spike for one-time step. I understand this is only an artefact and occurs in only one time step but I'm wondering that if there is a pro tip to avoid this? or to at least minimise this spike.
Much appreciated.
This is frequent on generic renewable energy models. Things to look for: a. Is the simulation converging during fault? If not, it is highly like that a spurious voltage or frequency spike occurs. Look for a way to make the simulation converging even during faulted condition. In my opinion, non-convergence during fault is still acceptable since the treatment of fault on dynamic simulation programs is a "mathematical discontinuity". However, the recovery causes spikes in frequency or voltage. b. Try to adjust network simulation time step. c. Look for adjustable filter time constants in the model. You may want to reduce this so high frequency spikes will be eliminated.
Indeed you are right, I'm testing an inverter model and during the fault, it is non-convergence condition. there is a restricted guideline and I can't change the simulation parameter setting. Both DELT and filter must be 0.001 and 0.008. I will check whether if the model filter can fix it.
Asked: 2020-04-06 19:54:48 -0500
Seen: 619 times
Last updated: Apr 08 '20
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