Thank you for your comments. Since I am using MatACDC as well and they state that MATACDC has been tested with the latest stable version MATPOWER 4.1 hence I was using 4.1.
That is correct, probably LOST sight of the basic thing Vm. Rajesh. Quoting Ray Zimmerman <[email protected]>: > 1 & 2. Vm should be set to 1, not zero, for a flat start. That might be your > problem. > 3. MATPOWER 4.1 did not have continuation power flow. I recommend upgrading > to the latest version (5.1). > > Ray > > > On Sep 25, 2015, at 12:59 PM, [email protected] wrote: > > > > 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 -------------------------- Rajesh Vaid Links: ------ [1] http://www.pserc.cornell.edu/matpower/#pfconvergence
