The OPF result should be reliable … the inaccuracy is simply in the computation of the step the algorithm is taking to attempt to find a solution. If all of the termination criteria are met (i.e. solver terminates successfully), the solution should be fine.
-- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Mar 1, 2013, at 12:09 PM, Santiago Torres <[email protected]> wrote: > Dear Ray, > > Sometimes, despite opf converges, I get some warnings like this in ACOPF: > > Warning: Matrix is close to singular or badly scaled. > Results may be inaccurate. RCOND = 7.132199e-017. > Warning: Matrix is close to singular or badly scaled. > Results may be inaccurate. RCOND = 1.517807e-016. > > I guess they are the condition number, where if it is near 0, a matrix > A is badly contitioned. My question is, if the opf results are not > reliable in this case, in spite of opf convergency? or, what would be > the measure to decide if it is a reliable result..?? > > Best wishes, > > Santiago > > > > -- > Dr.-Ing. Santiago Torres > IEEE Senior Member > > Post-Doctoral Fellow > School of Electrical and Computer Engineering > > > University of Campinas, Campinas, SP, Brazil > > http://www.dsee.fee.unicamp.br/ > > Albert Einstein, 400 > 13083-852, Campinas, SP, Brazil >
