Short answer: Yes. It’s called an optimal power flow. Long answer: The power flow problem computes a set of unknowns (flows, voltage angles, some voltage magnitudes, some reactive injections, etc) from a set of specified quantities (active injections, generator voltage magnitudes, etc.). By definition, the flows computed by this problem may violate limits. When you say you want to “activate thermal lims in pf” you are implicitly saying that if a limit would be violated by the simple power flow solution you want to adjust some input parameter(s) to prevent that. There are typically an infinite number of ways to make these adjustments and satisfy the constraints. So, which input parameters are available for adjustment? And what criteria should be used to choose which adjustments to make? You now need a problem formulation that formalizes your answer to those questions. The optimal power flow with appropriate constraints and costs is precisely such a formulation. To limit the adjustments to only those you want, you may need to constrain some of the variables (voltages, dispatches, etc) to the desired values, as opposed to the ranges used for a typical OPF, but the problem formulation is the correct one, you just need to carefully specify the input parameters so it solves the problem you want.
Ray > On May 6, 2015, at 10:50 AM, Απόστολος Αρσενόπουλος <[email protected]> > wrote: > > Hi all, > Is there a way i can activate thermal lims in pf?? > > Thank you, > AA > >
