Thanks for your help But If I consider voltage angles at different buses, it still gives me the same results no matter the load. I would be so thankful if you could help me with this.
Best, Hanie On Fri, May 18, 2012 at 1:04 PM, Carlos E Murillo-Sanchez < [email protected]> wrote: > Oops, that fourth line should be > > > Nominal_QD = mpc.bus(:, QD); > > > > Carlos E Murillo-Sanchez wrote: > >> There is a rather flexible utility in matpower for scaling loads. Type >> >> help scale_load >> >> at the matlab prompt for help on how to use it. Otherwise, if you just >> want to modify inflexible demand, >> you could do something like >> >> mpc = loadcase('case118'); >> define_constants; >> Nominal_PD = mpc.bus(:, PD); >> Nominal_QD = mpc.bus(:, QG): >> for factor = 0.8:0.01:1.20 >> mpc.bus(:, PD) = factor * Nominal_PD; >> mpc.bus(:, QD) = factor * Nominal_QD; >> results = runpf(mpc); >> % now insert code here to do whatever you want to do with the results >> your code.... >> more code... >> end >> >> This scales inflexible demand in the system by a factor from 80% of >> nominal to 120% of nominal in 1% increments and runs a power flow; you >> could run also an optimal power flow using runopf() instead. The load is >> scaled maintaining a constant power factor. >> >> >> >> >> Hanie Sedghi wrote: >> >>> Dear Sir, >>> >>> I would like to have different voltage angle values at different times >>> for a structure. Let's say I want to have the same structure as case9, but >>> I want to know what are the values at different times. It is like >>> simulating a grid and taking samples at different times. For that I think I >>> need different demands. Then I checked the case file and thought I need to >>> put random Pg's in "gen" matrix. Am I right? Shall I generate random values >>> in [Pmin,Pmax] interval? >>> I have another question, in case9, for bus 1, Pg=0 while Pmin=10. Is it >>> correct? Can Pg be less than Pmin? In that case,what do we mean by Pmin? >>> >>> I would truly appreciate your help. >>> >>> Best, >>> Hanie >>> >> >> >> >> > >
