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dpflow.m
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dpflow.m
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function outputObject = dpflow(caseObject)
%%Timer starts
t1 = clock;
%% Labels
[~, ~, ~, ~, BID, ~, VMA, VMB, VMC, VAA, VAB, VAC, BASEKV] = busIndexer;
[FBUS, TBUS, ~, ~, ~, ~, ~, ~, ~, ~, ~, ~, ~, ~, ...
~, ~, ~, ~, ~, ~, ~] = lineBranchIndexer;
%%
[baseMVA, bus, gen, yload, dload, lineBranch, trafoBranch] = loadDistCase(caseObject);
%Number of elements
nnodes = size(bus,1);
nyload = size(yload,1);
ndload = size(dload,1);
nline = size(lineBranch,1);
ntrafo = size(trafoBranch,1);
%% Indexing
ext2intID = zeros(nnodes,1);
ext2intID(bus(:,BID))=(1:nnodes)';
bus(:,BID) = (1:nnodes)';
gen(:,BID) = ext2intID(gen(:,BID));
if (nyload~=0)
yload(:,BID) = ext2intID(yload(:,BID));
end
if (ndload~=0)
dload(:,BID) = ext2intID(dload(:,BID));
end
if (nline~=0)
lineBranch(:,FBUS) = ext2intID(lineBranch(:,FBUS));
lineBranch(:,TBUS) = ext2intID(lineBranch(:,TBUS));
end
if (ntrafo~=0)
trafoBranch(:,FBUS) = ext2intID(trafoBranch(:,FBUS));
trafoBranch(:,TBUS) = ext2intID(trafoBranch(:,TBUS));
end
%%
[~,pv3,pq3]=distBusTypes(bus);
[Ybus, Ypr] = YMaker(nnodes, yload, dload, lineBranch, trafoBranch, baseMVA);
mp = find(any(Ybus,2)==0);
%ref = setdiff(reshape([3*ref3-2,3*ref3-1,3*ref3].',[],1),mp);
pv = setdiff(reshape([3*pv3-2,3*pv3-1,3*pv3].',[],1),mp);
pq = setdiff(reshape([3*pq3-2,3*pq3-1,3*pq3].',[],1),mp);
[Swye, Sdelta, Iwye, Idelta]= Sbus_creation(baseMVA, gen, yload, dload ,nnodes);
%Turn angles from degrees into radians
bus(:,[VAA, VAB, VAC]) = bus(:,[VAA, VAB, VAC])*pi/180;
% Voltage bus allocation (magnitude and angle)
V_mag = reshape(bus(:,[VMA, VMB, VMC]).',[],1);
V_ang = reshape(bus(:,[VAA, VAB, VAC]).',[],1);
%% Initial values for fsolve
x0=[V_ang([pv;pq]);V_mag(pq)];
%%Timer starts
t2 = clock;
%%
%global res
%global iter
options=optimoptions('fsolve','TolFun',1E-10,'FiniteDifferenceType',...
'central','MaxFunEvals',200000,'Display','iter','MaxIter',1000,...
'Jacobian','on','OutputFcn',@resfun);
xsol = fsolve(@loadsol,x0,options);
function [diff,J]=loadsol(x)
V_ang(pv)=x(1:length(pv));
V_ang(pq)=x(length(pv)+1:length([pv;pq]));
V_mag(pq)=x(length(pv)+length(pq)+1:length(x));
Vbus = V_mag.*exp(1i*V_ang);
VLL = phaseGround2phasePhase(Vbus);
Ibus_delta = (Sdelta + Idelta.*abs(VLL)/sqrt(3))./VLL;
Sbus = Swye + Iwye.*abs(Vbus) + Vbus.*(Ibus_delta-threePhaseShift(Ibus_delta,1));
mis = Vbus .* conj(Ybus * Vbus) - Sbus;
diff = [real(mis([pv; pq])); imag(mis(pq))];
%Calculate the jacobian, matpowerstyle.
[dSbus_dVm, dSbus_dVa] = dSbus_dV_full(Ybus, Vbus, VLL, Sdelta, Iwye, Idelta);
j11 = real(dSbus_dVa([pv; pq], [pv; pq]));
j12 = real(dSbus_dVm([pv; pq], pq));
j21 = imag(dSbus_dVa(pq, [pv; pq]));
j22 = imag(dSbus_dVm(pq, pq));
J = [ j11 j12;
j21 j22; ];
end
function stop=resfun(~,optimValues,state)
switch state
case 'iter'
L=optimValues.fval;
iter=optimValues.iteration;
resnorm=L'*L;
res(iter+1)=resnorm;
stop=0;
otherwise
stop=0;
end
end
%% Output format
V_ang(pv)=xsol(1:length(pv));
V_ang(pq)=xsol(length(pv)+1:length([pv;pq]));
V_mag(pq)=xsol(length(pv)+length(pq)+1:length(xsol));
Vlg_pu = V_mag.*exp(1i*V_ang);
%%Timer ends
t3 = clock;
baseVoltages = tripleVector(caseObject.bus(:,BASEKV));
Vlg = Vlg_pu.*1e3.*baseVoltages;
Vll = phaseGround2phasePhase(Vlg);
Ibus_pu = Ybus * Vlg_pu;
Ibase = baseMVA*1e3./baseVoltages;
Ibus = Ibase.*Ibus_pu;
Sbus_MVA = Vlg.*conj(Ibus)/1e6;
index = caseObject.bus(:,BID);
%% Bus quantities
outputObject.busInfo = zeros(nnodes,22);
outputObject.busInfo(:,1) = index;
outputObject.busInfo(:,2:4) = threePhaseArray(abs(Vlg_pu));
outputObject.busInfo(:,5:7) = threePhaseArray(angle(Vlg_pu)*180/pi);
outputObject.busInfo(:,8:10) = threePhaseArray(abs(Vlg));
outputObject.busInfo(:,11:13) = threePhaseArray(abs(Vll));
outputObject.busInfo(:,14:16) = threePhaseArray(angle(Vll)*180/pi);
outputObject.busInfo(:,17:19) = threePhaseArray(real(Sbus_MVA));
outputObject.busInfo(:,20:22) = threePhaseArray(imag(Sbus_MVA));
if nnodes<=1000
Conn = connectionMatrix(index,caseObject.lineBranch(:,FBUS:TBUS),caseObject.trafoBranch(:,FBUS:TBUS),nnodes);
trafoLink = zeros(2*ntrafo,2);
for n=1:ntrafo
trafoLink(2*n-1,:) = [caseObject.trafoBranch(n,FBUS),-n];
trafoLink(2*n ,:) = [-n,caseObject.trafoBranch(n,TBUS)];
end
links = [caseObject.lineBranch(:,FBUS:TBUS);trafoLink];
numbr = size(links,1);
Ibr_base = zeros(3*numbr,1);
for n=1:size(links,1)
if(links(n,1)~=-1)
Ibr_base(3*n-2:3*n) = baseMVA*1e3./caseObject.bus(caseObject.bus(:,BID)==links(n,1),BASEKV);
else
Ibr_base(3*n-2:3*n) = baseMVA*1e3./caseObject.bus(caseObject.bus(:,BID)==links(n,2),BASEKV);
end
end
Vbranch_pu = Conn * Vlg_pu;
Ibranch_pu = Ypr * Vbranch_pu;
Ibranch = Ibranch_pu .*Ibr_base;
Sloss = 1e3 * baseMVA * Vbranch_pu .* conj(Ibranch_pu); %kVA
%% Branch quantities
outputObject.branchInfo = zeros(numbr,14);
outputObject.branchInfo(:,1:2) = links;
outputObject.branchInfo(:,3:5) = threePhaseArray(abs(Ibranch));
outputObject.branchInfo(:,6:8) = threePhaseArray(angle(Ibranch)*180/pi);
outputObject.branchInfo(:,9:11) = threePhaseArray(real(Sloss));
outputObject.branchInfo(:,12:14) = threePhaseArray(imag(Sloss));
end
%% Save results to file
saveDistCaseResults(outputObject);
t4 = clock;
fprintf('Time elapsed per stage:\n')
fprintf('Data preparation : %.4f seconds\n',etime(t2,t1));
fprintf('Nonlinear solver : %.4f seconds\n',etime(t3,t2));
fprintf('Saving to file : %.4f seconds\n',etime(t4,t3));
fprintf('____________________________________\n');
fprintf('Total elapsed time : %.4f seconds\n\n',etime(t4,t1));
fprintf('Results saved to file distCaseResults');
end % End of function