Hi Surbhi, The system is becoming unobservable, I guess.
Regards, Md On Wed, Sep 9, 2020, 2:12 AM Surbhi Aggarwal <[email protected]> wrote: > Dear All, > I am working on optimal power flow to find the contingency (N-1) situation > of the system. For some of the line outage, certain output pops out > > MATPOWER Version 7.0, 20-Jun-2019 -- AC Power Flow (Newton) > Warning: Matrix is singular to working precision. > > In mplinsolve (line 75) > In newtonpf (line 110) > In runpf (line 260) > Warning: Matrix is singular to working precision. > > In mplinsolve (line 75) > In newtonpf (line 110) > In runpf (line 260) > Warning: Matrix is singular to working precision. > > In mplinsolve (line 75) > In newtonpf (line 110) > In runpf (line 260) > Warning: Matrix is singular to working precision. > > In mplinsolve (line 75) > In newtonpf (line 110) > In runpf (line 260) > Warning: Matrix is singular to working precision. > > In mplinsolve (line 75) > In newtonpf (line 110) > In runpf (line 260) > Warning: Matrix is singular to working precision. > > In mplinsolve (line 75) > In newtonpf (line 110) > In runpf (line 260) > Warning: Matrix is singular to working precision. > > In mplinsolve (line 75) > In newtonpf (line 110) > In runpf (line 260) > Warning: Matrix is singular to working precision. > > In mplinsolve (line 75) > In newtonpf (line 110) > In runpf (line 260) > Warning: Matrix is singular to working precision. > > In mplinsolve (line 75) > In newtonpf (line 110) > In runpf (line 260) > Warning: Matrix is singular to working precision. > > In mplinsolve (line 75) > In newtonpf (line 110) > In runpf (line 260) > > Newton's method power flow (power balance, polar) did not converge in 10 > iterations. > > >>>>> Did NOT converge (7.38 seconds) <<<<< > > What to do to correct this error. It would be of great help. > Regards > Surbhi Aggarwal >
