I assume you have a single generator at bus 1. It is the value in the VG column of the gen matrix that sets the voltage magnitude for the corresponding buses. The voltages in the bus matrix are simply used to initialize the power flow solver.
-- Ray Zimmerman Senior Research Associate B30 Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Nov 11, 2013, at 10:20 AM, Tim Chen <[email protected]> wrote: > So I have just started to use matpower... If the questions sound silly, it's > because they are. :) > > Right now I have a very simple system consisting of a single line feeder with > twelve buses with some power drawn at each bus. I set bus one as the > reference bus and the rest as PQ buses. > > I don't have any system data besides R and X values for the branch data. > > I have 2 questions > > Why does it matter what the voltages for the PQ buses are? I only know the P > and Q values... > > I want the voltage at bus 1 to be 1.1 p.u. and decrease steadiness along the > line. I don't understand why after runpf the voltage always start at one. > > Thank you in advance, > > Tim
