Dear Dr. Zimmerman, Thank you so much for your reply, but could I then clarify that for each case of branch flow, (i.e. power flowing from f (sending node) to t(receiving node)) either only (5.7) or (5.8) is taken in consideration right(i.e.only (5.7) is relevant as (5.8) is for when t is the sending node and f is the receiving node right? ).
Thank you once more for your time, Sincerely, Sashi On Thu, Aug 1, 2013 at 11:34 PM, Ray Zimmerman <[email protected]> wrote: > 1. Yes. It is taken from the RATE_A column of the branch matrix. > 2. Ff gives the flow (apparent power, real power, or current, depending on > the option selected) in p.u. at the from end of all branches as a function > of a set of voltages and angles (which may or may not correspond to a power > flow solution). At the solution, in the case where Ff = Pf, then Ff = > results.branch(:, PF)/results.baseMVA. I don't think your rewriting of > (5.7) and (5.8) is quite equivalent since both Ff and Ft must be bounded by > -Fmax and Fmax, and either can be positive or negative, so Fft has to be > the max of the absolute values. > > -- > Ray Zimmerman > Senior Research Associate > B30 Warren Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > > > > > On Aug 1, 2013, at 7:48 AM, Sashireka Appalasamy < > [email protected]> wrote: > > Dear Dr. Zimmerman, > > Just to let you know that I have a number of queries on equation 5.7 and > 5.8, page 29 off the MATPOWER manual as given below, > > 1. Is the Fmax value the same for both the equations? > 2. What is the value for Ff(theta,Vm)? Is it the same as > results.branch(X,PF) for a given executed power flow and > Ft(theta,Vm)=results.branch(X,PT) > OR could equation 5.7 and 5.8 be written in the form -Fmax< Fft<Fmax which > also means that equation 5.7 and 5.8 are only considered one at a time and > that Fft value be equivalent to the max of (PF,PT)? > > Thank you in advance for your valuable time > > Sincerely, > Sashi > > >
