If a particular outage would result in voltage collapse, then I don’t think the power flow will even converge, so you won’t be able to check the voltages against Vmin. And if it does converge to a voltage below Vmin, it’s not yet reached voltage collapse. If you need to be able to verify that the reason for non-convergence of a given power flow is voltage collapse, then I suspect you will need to use a continuation power flow.
Ray > On Apr 22, 2015, at 3:36 PM, Lu, Yueyun <[email protected]> wrote: > > Hi all, > > I’m doing cascading failure simulation which involves recursively solving > power flow and checking constraints. I’d like to consider voltage collapse as > one of the factors. Is it reasonable to think of voltage tripping criterion > as comparing the voltage solved by ac pf with the V_min provided in the case > file? I’m aware of the better choice for voltage stability analysis is to do > continuation pf. But it is targeted at analyzing PV curve for each bus rather > than directly giving threshold to check. Is there any other efficient way to > implement this? > > Thanks a lot! > Yueyun
