Re: total line each branch

[Carlos E Murillo-Sanchez]

Branch admittances are additive in the Ybus matrix construction procedure.  makeYbus uses the sparse() function to build Ybus, and automatically adds any admittances resulting from parallel branches in the right places.  You should have no problem with parallel lines such as these. ikrima alfi wrote: thanks Mr. Santiago. If I copy the row (colored row) of branch data, Is this same: from bus 1 to bus 4 has 2 lines and from bus 2 to bus 6 has 3 lines ? and is runpf calculations still valid? On Mon, Oct 7, 2013 at 9:53 PM, Santiago Torres <santiago.i...@gmail.com> wrote: You have to change (by coding) the impedances and other parameters proportionally to the number of lines.  Matpower does not that automatically or simply working with the data file.   Hope this help.   Santiago 2013/10/7 ikrima alfi <ikrima.a...@gmail.com> Dear Dr Ray Zimmerman My research is about  expansion transmission planning (TEP).  TEP allows a branch has more than one line, while all cases in matpower has only single line. I use DCPF to calculate power flow. For example: From bus 2 to bus 3 has 2 lines From bus 2 to bus 4 has 3 lines How to calculate this case? -- Dr.-Ing. Santiago Torres IEEE Senior Member Power Systems Researcher