If you are referring to constraints on the P and Q of generators, there are already limits included (see the PMIN, PMAX, QMIN, QMAX columns of the gen matrix). Yes, the losses will change (at least slightly) with a change in the power factor of the loads.
-- Ray Zimmerman Senior Research Associate 211 Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Mar 14, 2011, at 12:08 PM, Rashmi Agarwal wrote: > > respected sir, > > thanks a lot for replying me back .With P & Q i mean active power > constraint and reactive power constraint and voltage constraints .Again what > can be limits for ieee14 bus if we increase PD by 10% as i want to find out > how much losses will increase .The main objective is to find out losses if > load changes. If we change load pf ,will it also affect losses. > > rashmi > From: Ray Zimmerman <[email protected]> > To: MATPOWER discussion forum <[email protected]> > Sent: Mon, 14 March, 2011 8:50:36 PM > Subject: Re: powe demand > > Use scaleload (see help scaleload for details). If you want to increase both > P and Q loads proportionally, simply use ... > > mpc = loadcase('case14'); > [mpc.bus, mpc.gen] = scale_load(1.1, mpc.bus, mpc.gen); > > You don't need any extra constraints since the loads are fixed P and Q values. > > -- > Ray Zimmerman > Senior Research Associate > 211 Warren Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > > > On Mar 12, 2011, at 5:36 AM, Rashmi Agarwal wrote: > >> respected sir, >> >> this is the first time sending you mail . if i am considering IEEE14 bes and >> i >> want to increase powr demand by 10% but putting P , Qconstraints .how to do >> it >> and how to add constraint and what can be the limits of constraints. pls >> help me >> out. >> >> >> >> regards >> >> rashmi >> >> >> >> > > >
