This is a modeling issue (not really a MATPOWER issue). You’ll need to use the
nominal voltage to convert your current rating to an MVA rating.
Ray
> On Feb 14, 2019, at 1:34 AM, amir ali Hosseini <[email protected]> wrote:
>
> Hello
> and thanks a lot
> I can make net work .
> and now
> I need rateA,B,C
> my cable is
>
>
> <image.png>
>
>
> i found rating current
> 698
> 483
> 230
> 156 ampere
> but I do nt how get rate A,B,C
> thank you
>
> On Tue, Feb 12, 2019 at 7:08 PM Ray Zimmerman <[email protected]
> <mailto:[email protected]>> wrote:
> 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] <mailto:[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.
> >
> >
>
>
>
