Hi,
my question is about the voltage level of each buses in a radial
distribution system. My understanding of this phenomena is that the
voltage level of the "farest" (in term of r and x) bus will have the
lowest voltage level if there is no generation or voltage regulator
between the slack bus and that bus? Am I getting it wright?
Because in the above example, based on the modified iee9_bus case given
by the tool, i get a strange behaviour. The last bus (8) don't have the
lower votage level, so based on that how can that factor be explained?
You can find attached to the email, the test case and a figure of the
graph of the network.
Thank you very much for reading my question
Abdelkrim
function mpc = case9
%CASE9 Power flow data for 9 bus, 3 generator case.
% Please see CASEFORMAT for details on the case file format.
%
% Based on data from Joe H. Chow's book, p. 70.
% MATPOWER
% $Id: case9.m,v 1.11 2010/03/10 18:08:14 ray Exp $
%% MATPOWER Case Format : Version 2
mpc.version = '2';
%%----- Power Flow Data -----%%
%% system MVA base
mpc.baseMVA = 100;
%% bus data
% bus_i type Pd Qd Gs Bs area Vm Va
baseKV zone Vmax Vmin
mpc.bus = [
1 3 0 0 0 0 1 1 0
20 1 1.1 0.9;
3 3 0 0 0 0 1 1 0
20 1 1.1 0.9;
4 1 0 0 0 0 1 1 0
20 1 1.1 0.9;
5 1 90 43.58 0 0 1 1 0
20 1 1.1 0.9;
6 1 0 0 0 0 1 1 0
20 1 1.1 0.9;
7 1 100 48.43 0 0 1 1 0
20 1 1.1 0.9;
8 1 10 4.84 0 0 1 1 0
20 1 1.1 0.9;
9 1 125 60.54 0 0 1 1 0
20 1 1.1 0.9;
];
%% generator data
% bus Pg Qg Qmax Qmin Vg mBase status Pmax
Pmin Pc1 Pc2 Qc1min Qc1max Qc2min Qc2max ramp_agc ramp_10
ramp_30 ramp_q apf
mpc.gen = [
1 0 0 300 -300 1 100 1 250
10 0 0 0 0 0 0 0 0 0
0 0;
3 0 0 300 -300 1 100 1 270
10 0 0 0 0 0 0 0 0 0
0 0;
];
%% branch data
% fbus tbus r x b rateA rateB rateC ratio
angle status angmin angmax
mpc.branch = [
1 4 0.01 0.0576 0 250 250 250 0
0 1 -360 360;
5 6 0.039 0.17 0.358 150 150 150 0
0 1 -360 360;
3 6 0.01 0.0586 0 300 300 300 0
0 1 -360 360;
6 7 0.0119 0.1008 0.209 150 150 150 0
0 1 -360 360;
8 9 0.032 0.161 0.306 250 250 250 0
0 1 -360 360;
9 4 0.01 0.085 0.176 250 250 250 0
0 1 -360 360;
];
