Hello, 1. I have tried to run the case again and below is the error that I get. runpf(t_case39rv_Orig)
MATPOWER Version 4.1, 14-Dec-2011 -- AC Power Flow (Newton) Warning: Matrix is singular to working precision. > In newtonpf at 109 In runpf at 220 Warning: Matrix is singular to working precision. > In newtonpf at 109 In runpf at 220 Warning: Matrix is singular to working precision. > In newtonpf at 109 In runpf at 220 Warning: Matrix is singular to working precision. > In newtonpf at 109 In runpf at 220 Warning: Matrix is singular to working precision. > In newtonpf at 109 In runpf at 220 Warning: Matrix is singular to working precision. > In newtonpf at 109 In runpf at 220 Warning: Matrix is singular to working precision. > In newtonpf at 109 In runpf at 220 Warning: Matrix is singular to working precision. > In newtonpf at 109 In runpf at 220 Warning: Matrix is singular to working precision. > In newtonpf at 109 In runpf at 220 Warning: Matrix is singular to working precision. > In newtonpf at 109 In runpf at 220 Newton's method power did not converge in 10 iterations. Did not converge (0.07 seconds) 2. As I unterstand after looking into the code of runpf, it seems that the 0s entered in the data under Va and Vm seem to be the problem. 3. While trying to runcpf as mentioned in FAQ #5 I get the follwing error: ??? Undefined function or method 'runcpf' for input arguments of type 'struct'. I look fwd to some guidance / resolution pl. Thank you. Quoting Ray Zimmerman <[email protected]>: > 1. That is correct. > 2. That isn?t technically a question. I don?t know why, but you may want to > see FAQ #5[1] for ideas. > 3. MATPOWER does not have any functions that return eigenvalues directly, > though I don?t doubt that it has functions to help form some of your matrices > of interest. > > > On Sep 18, 2015, at 12:02 PM, [email protected] wrote: > > > > Hi Ray, > > I am a new user of MATPOWER and MATACDC ana a Ph.D student @ University of > > Manitoba. I have downloaded and installed MATPOWER 4.1 with Matlab version > > 7.10. > > I am working with IEEE 39 bus case and noted that there is a discrepancy in > > terms of loads at buses with the data I have from > > http://publish.illinois.edu/smartergrid/ieee-39-bus-system/ and that in > > case39. The same has been highlighted in some postings here too. > > > > I have 3 simple questions:- > > Q1. A very basic one - When I enter data in the bus struct the value for Vm > > and Va can be 1 and 0 respectively. Since the Volt. magnitude and Volt. > > angle will be computed by load flow. (As I understand). > > Q2. I did enter the data as provided in the Univ. of Illinois site > > mentioned above and I found that my case did not converge? > > Q3. Is it possible to find the eigenvalues of AC-DC system using MATPOWER? > > > > Since I am working with this data can you please throw some light as to how > > I can resolve the issue. I will be very grateful. > > > > -------------------------- > > Rajesh Vaid -------------------------- Rajesh Vaid Links: ------ [1] http://www.pserc.cornell.edu/matpower/#pfconvergence
