Hi iman, The values R and X in mpc.branch matrix are per unit quantities. If you have R and X given in ohms/km the effective values in ohms must be converted to per unit impedance. The base impedance can be calculated from the given or assumed Base MVA and Base voltage. Given the sequence impedance, it is enough to use the positive sequence R and X and convert to per unit impedance assuming the network is transposed. Which the assumption used in MATPOWER power flow computation. Hope this will help. Idris ________________________________________ From: [email protected] [[email protected]] On Behalf Of iman [[email protected]] Sent: 06 June 2012 15:06 To: MATPOWER discussion forum Subject: Branch positive and negative sequence resistance and reactance
Dear All, 1-In mpc.branch do r and x represent positive and negative sequences or zero sequences? 2- Are r and x per Kilometer or not? Thanks Iman
