Oops … sorry for the repeat, Carlos, didn’t see this until after I’d sent my reply.
Ray > On Feb 11, 2019, at 11:10 AM, Carlos E Murillo-Sanchez > <[email protected]> wrote: > > amir ali Hosseini wrote: >> Dear Sir, >> i trying make a new network. 37 bus >> but ! after runpf .i have warning! >> can you help me ? >> thanks a lot. >> my warning is : >> Warning: Matrix is singular to working precision. >> > In newtonpf (line 89) >> In runpf (line 204) >> find attachment . >> new network with 37 node. >> > This is the output of case_info.m applied to your case file: > > >> case_info(mpc) > Checking connectivity ... single connected network, plus 1 isolated bus > Elapsed time is 0.245606 seconds. > ================================================================================ > Full Island Isolated > System 1 Buses > Number of: ---------- ---------- ---------- > buses 37 36 1 > loads 36 35 1 > on 36 35 1 > off - - - > fixed 36 35 1 > dispatchable - - - > on - - - > off - - - > generators 1 1 - > on 1 1 - > off - - - > shunt elements - - - > branches 36 36 - > on 36 36 - > off - - - > ties (off) - - - > > Load > active (MW) > dispatched 9.6 9.5 0.1 > fixed 9.6 9.5 0.1 > dispatchable - - - > curtailed - - - > nominal 9.6 9.5 0.1 > on 9.6 9.5 0.1 > off - - - > fixed 9.6 9.5 0.1 > dispatchable - - - > on - - - > off - - - > reactive (MVAr) > dispatched 4.6 4.6 0.0 > fixed 4.6 4.6 0.0 > dispatchable - - - > curtailed - - - > nominal 4.6 4.6 0.0 > on 4.6 4.6 0.0 > off - - - > fixed 4.6 4.6 0.0 > dispatchable - - - > on - - - > off - - - > > Generation > active (MW) > dispatched 11.5 11.5 - > max capacity 10.0 10.0 - > on 10.0 10.0 - > off - - - > min capacity - - - > on - - - > off - - - > reactive (MVAr) > dispatched - - - > max capacity 1.5 1.5 - > on 1.5 1.5 - > off - - - > min capacity -0.2 -0.2 - > on -0.2 -0.2 - > off - - - > > Shunt Injections > active (MW) - - - > reactive (MVAr) - - - > > Branch Losses > active (MW) - - - > reactive (MVAr) - - - > > DC line > export (MW) > dispatch - - - > max capacity - - - > on - - - > off - - - > min capacity - - - > on - - - > off - - - > > Reference Buses > num of ref buses 1 1 0 > ref bus numbers 1 1 > >> > > It seems that you have an isolated bus; is this what you intend in your case > file? > > carlos. > >
