What Shri says is almost correct. It will mark the bus as being out of service, but it must also be disconnected by setting the BR_STATUS any connected branches to 0 as well.
-- Ray Zimmerman Senior Research Associate 419A Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Apr 25, 2013, at 10:21 AM, Shri <[email protected]> wrote: > > On Apr 25, 2013, at 7:34 AM, Hendrik Acker wrote: > >> Dear Mr. Zimmerman, >> what do you mean by setting the Bus_type to none? I thought the bus type >> has to be a 1-digit between 0 and 3. > Bus_type is a single digit between 1 and 4. Setting the bus_type = 4 (NONE) > will make the bus out of service. >> As Ashwin, I too, would like to know how to disable/turn off a bus without >> having to remove it from the model-file. >> >> Best regards >> Hendrik Acker >> >> Von: [email protected] >> [mailto:[email protected]]Im Auftrag von Ray >> Zimmerman >> Gesendet: Montag, 22. April 2013 22:35 >> An: MATPOWER discussion forum >> Betreff: Re: re; problem with matpower- removing the bus from network >> >> 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 >> >> >> >
