Hi!
please find in attachment
if you increasing load or increasing DG power . you will have a curve
exponential .that on the special value , you have min LOSS .
see below
clc;
clear;
close all;
%%costant
%% run net work without DG ,get the location
mpc = loadcase('case37');
% %% power flow new network with forward/backward sweep-based power flow
mpopt = mpoption('pf.alg','PQSUM');
results = radial_pf(mpc,mpopt);
% results = runpf(mpc); %load flow newton
loss1 = sum(abs(get_losses(results)));% loss before add DG
n = 0;
for i=0.1:0.1:3
n=n+1;
mpc = loadcase('case37');
mpc.gen(2,:) = [8 i 0 1.50 -0.20 1 15 1 10 0 0 0 0 0
0 0 0 0 0 0 0];
mpopt = mpoption('pf.alg','PQSUM');
results = radial_pf(mpc,mpopt);
loss2 = sum(abs(get_losses(results)));%loss after add DG
loss(n,1) = sum(abs(get_losses(results)));
end
if "LOSS" plotting . you will see that in the 20 * 0.1 =DG 2 MW you have
minim mom LOSS .
so
any capacitor of the DG not suitable for any the load
find paper in attachment
you need optimal size and locate DG until that is true .On Thu, Jun 13, 2019 at 9:24 PM Ahmad Sadiq Abubakar < [email protected]> wrote: > Hi, > For radial distribution networks, Newton power flow often encounter > convergence issues due to high r/x ratio. > I suggest you look at articles on "Improved CPF for distribution networks" > > Hope this helps. > Ahmad > > On Thu, Jun 13, 2019, 3:36 PM akhil <[email protected]> wrote: > >> >> >> ---------- Forwarded message --------- >> From: akhil <[email protected]> >> Date: Thu, 13 Jun 2019 at 19:52 >> Subject: Maximum load limit for radial distribution cases. >> To: <[email protected]> >> >> >> I am running the radial distribution power flow which is based on >> backward forward sweep algorithm. for the network data which is provided >> with matpower the radial load flow converges successfully. But to get the >> maximum load limit of the system, when I am running the load flow with >> increased load at each bus in a step of 1 % the radial load flow does not >> converge after some point. >> The change in Load is as per Pnew=Lambda*P0 and Qnew=Lambda*Q0 with 1 % >> change in load at all buses simultaneously. >> I am Trying to get the minimum bus voltage of the system after each >> change in load and running corresponding radial flow successively until the >> minimum voltage of the system (bus with minimum voltage) getting reduced >> smoothly. >> The code which I run is attached herewith for your reference. >> >> >> >> >> Thank you >> >> Yours >> Akhilesh K Barnwal >> Ph.D. Research Scholar >> IIT BHU Varanasi. >> mail: [email protected] >> >> >> -- >> >> >> >> >> >> @khil >> >
case37.m
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optimal size and siting DGs.pdf
Description: Adobe PDF document
