Dear Prof. Ray, Yes, you are correct. I have set QC1MIN = 0, QC1MAX = 0, QC2MAX = 4.84 and QC2MIN = -3.28. But I have doubt on the value of Qg=4.60 MVAr. Generally, in capability curve, if generator has to produce more reactive power then it has to reduce its active power generation to remain within the area defined by its upper boundary (field heating limit). Here in my case if I fix the value of Pg=9.5 MW and if generator produces Qg=4.60 MVAr , then if we intersect these two points (MVA) isn't it working beyond its capability curve ? I have attached modified PQ capability curve diagram.
Thanks and regards Mirish On Wed, Apr 6, 2016 at 11:04 PM, Ray Zimmerman <[email protected]> wrote: > I assume you mean that you also set QC1MIN = 0, QC1MAX = 0, QC2MAX = 4.84 > and QC2MIN = -3.28? > > If so, then I’m not sure where you are getting the 0.24 MVAr. The > allowable range at 10 MW would be -3.28 to +4.84 MVAr … at 9.5 MW it would > be 0.95 times those numbers, i.e. -3.12 to +4.60 MVAr. > > Which is what you see. > > Ray > > > > > On Apr 6, 2016, at 11:16 AM, Mirish Thakur <[email protected]> wrote: > > Dear Prof. Ray, > > I have modeled capability curve in triangular shape. Ex. P1=0, P2= 10 MW, > Qmax =4.84, Qmin =-3.28, Pmax=Pmin=9.5. So at this Pmax limit generator > should produce reactive power =0.24 MVAr but in opf it generates 4.60 MVAr. > I don't understand the reason because I have fixed the active power > generation and Qg should generate from zero to vertical max limit of > capability curve. I read previous answers on forum > https://www.mail-archive.com/matpower-l%40cornell.edu/msg03986.html but > could not understand what changes you have made in hasPQcap function. Thank > you for your time. > > regards > Mirish > > >
