I meant the total load served is not getting changed even when buses are isolated
On Mon, Apr 22, 2013 at 1:34 PM, Ray Zimmerman <[email protected]> wrote: > Are you saying that MATPOWER is incorrectly reporting the total load > served? Hmmm, yes, it looks like that is true. That would be a bug. I will > make a note and plan to include a fix in the next version. Thanks for > catching that. > > -- > Ray Zimmerman > Senior Research Associate > 419A Warren Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > > > > On Apr 22, 2013, at 4:28 PM, Ashwin Venkataramanan <[email protected]> > wrote: > > Dear Dr ZImmerman > > I have rectified the above problem. > But now when i remove the bus or substation there is some load i will not > be able to supply. > I am not able to get the value of load being supplied by the system after > removing the buses. > That value is not getting updated. Is there any fix to this? > > Best Regards > Ashwin Venkataramanan > > > On Mon, Apr 22, 2013 at 1:19 PM, Ray Zimmerman <[email protected]> wrote: > >> 1) Make sure that when you isolate a bus you set it's BUS_TYPE to NONE >> and that your system still has a REF bus. >> 2) I'm not sure what you mean, but you can always load the case and make >> changes before running it, like … >> >> define_constants; >> mpc = loadcase('case118'); >> mpc.branch(110, BR_STATUS) = 0; >> r = runopf(mpc); >> >> -- >> Ray Zimmerman >> Senior Research Associate >> 419A Warren Hall, Cornell University, Ithaca, NY 14853 >> phone: (607) 255-9645 >> >> >> >> >> On Apr 20, 2013, at 10:53 PM, Ashwin Venkataramanan <[email protected]> >> wrote: >> >> Dear Dr.Zimmerman >> >> I am a graduate student in electrical engineering from >> Arizona state university. I have a doubt about opening buses using >> MATPOWER. I have two questions. >> >> 1) My simulation involves removing a substation out of the network >> and testing if the power flow converges. Just like first contingency >> analysis for substations. Each bus is characterized as a substation or in >> some cases combination of 2 buses are classified as substation. I have read >> the MATPOWER user manual, from which I find only ways to remove branches >> and generator from the network. I have tried the simulation by removing the >> branches connected to the bus using the command >> >> mpc.branch(110,BR_STATUS)=0; >> >> for removing the branch 110 which may connect two buses. Similarly >> removing all the branches connected to a bus in order to isolate a bus. I >> believe this approach is right to remove a bus. But my powerflow diverges >> each time I remove any bus(or substation). I believe this will not be a >> case as system most of time must work for first contingency involving >> substation. I have tested my code on both 118 and 30 bus case. Is there any >> way to remove bus directly off other than removing using the branches(above >> mentioned approach) ? >> >> 2) Is there any way to do convert the existing “case118.m” to modified >> 118 bus? >> >> Best Regards >> >> Ashwin Venkataramanan >> >> Arizona state university >> >> >> > >
