Thank you shri, for the reply. I did some mistakes while writing the case file. Now it's working fine. Thanks Rey for this wonderful tool-MATPOWER
Pinak On Sat, Jan 17, 2015 at 12:05 AM, Abhyankar, Shrirang G. < [email protected]> wrote: > My guess is that opening those lines is creating islands. Use the > function case_info to extract the islands. See > http://www.pserc.cornell.edu//matpower/#pfconvergence for info on > non-convergent power flow. > > Shri > > From: Pinak Panda <[email protected]> > Reply-To: MATPOWER discussion forum <[email protected]> > Date: Fri, 16 Jan 2015 19:42:46 +0530 > To: MATPOWER discussion forum <[email protected]> > Subject: Re: non convergence of 69 bus radial distribution system > > Dear Power Globers, > > Thank you Idris for your input I have updated the case file and it > converged. > > I am working on changing topology of the network and finding out it's > effects.If suppose I want to use the tie lines and for restraining radility > opens five section switches say [3 43 48 24 18]. As I typed > > >> op=[3 43 48 24 18]; > >> temp=loadcase(case69); > >> for i=1:5 > temp.branch(op(i),11)=0 > end > >> runpf(temp) > > It shows a warning as > > Warning: Matrix is close to singular or badly scaled. > Results may be inaccurate. RCOND = 1.724770e-017. > > In newtonpf at 108 > In runpf at 224 > > I am here attaching the case file. Please help me in this. > > Thanks and regards > Pinak > Kolkata,India > > > > On Sun, Jan 11, 2015 at 8:19 PM, Idris Musa (PGR) < > [email protected]> wrote: > >> Hi Panda, >> >> The real and the reactive loads (PD and QD) in column 3 and 4 of mpc.bus >> should be in MW and not kW as you currently have. >> >> Simply divide the current values representing PD and QD in columns 3 and >> 4 by 1000, and the power flow will converge. >> >> >> >> Idris >> >> >> >> *From:* [email protected] [mailto: >> [email protected]] *On Behalf Of *Pinak Panda >> *Sent:* 11 January 2015 05:48 >> *To:* [email protected] >> *Subject:* non convergence of 69 bus radial distribution system >> >> >> >> Hi all, >> >> >> >> I am trying to converge the power flow of 69 bus radial distribution by >> NR method here is the case file I have created.the error shows, It is not >> getting converged in 10 iterations. >> >> >> >> Please help me in this regard. >> >> >> >> Thanking you, >> >> Pinak Panda >> >> M.Tech-scholar >> >> SRIT Kolkata >> >> India >> > >
