gusucode.com > matpower工具箱源码程序 > matpower工具箱源码程序/MP2_0/pfsoln.m
function [bus, gen, branch] = pfsoln(baseMVA, bus0, gen0, branch0, Ybus, Yf, Yt, V, ref, pv, pq); %PFSOLN Updates bus, gen, branch data structures to match power flow soln. % [bus, gen, branch] = pfsoln(baseMVA, bus0, gen0, branch0, ... % Ybus, Yf, Yt, V, ref, pv, pq) % MATPOWER Version 2.0 % by Ray Zimmerman, PSERC Cornell 12/19/97 % Copyright (c) 1996, 1997 by Power System Engineering Research Center (PSERC) % See http://www.pserc.cornell.edu/ for more info. %% constants j = sqrt(-1); nl = size(branch0, 1); %% number of lines %% define named indices into bus, gen, branch matrices [PQ, PV, REF, NONE, BUS_I, BUS_TYPE, PD, QD, GS, BS, BUS_AREA, VM, ... VA, BASE_KV, ZONE, VMAX, VMIN, LAM_P, LAM_Q, MU_VMAX, MU_VMIN] = idx_bus; [GEN_BUS, PG, QG, QMAX, QMIN, VG, MBASE, ... GEN_STATUS, PMAX, PMIN, MU_PMAX, MU_PMIN, MU_QMAX, MU_QMIN] = idx_gen; [F_BUS, T_BUS, BR_R, BR_X, BR_B, RATE_A, RATE_B, ... RATE_C, TAP, SHIFT, BR_STATUS, PF, QF, PT, QT, MU_SF, MU_ST] = idx_brch; %% initialize return values bus = bus0; gen = gen0; branch = branch0; %%----- update bus voltages ----- bus(:, VM) = abs(V); bus(:, VA) = angle(V) * 180 / pi; %%----- update Qg for all gens and Pg for swing bus ----- %% generator info on = find(gen(:, GEN_STATUS)); %% which generators are on? gbus = gen(on, GEN_BUS); %% what buses are they at? refgen = find(gen(on, GEN_BUS) == ref); %% which is the reference gen? %% compute total injected bus powers %% This is slow in Matlab 5 ... % Sg = V(gbus) .* conj(Ybus(gbus, :) * V); %% ... so we do this instead ... temp = Ybus.'; Sg = V(gbus) .* conj(temp(:, gbus).' * V); %% update Qg for all generators gen(:, QG) = zeros(size(gen, 1), 1); %% zero out all Qg gen(on, QG) = imag(Sg) * baseMVA + bus(gbus, QD); %% inj Q + local Qd %% update Pg for swing bus gen(on(refgen), PG) = real(Sg(refgen)) * baseMVA + bus(ref, PD); %% inj P + local Pd %%----- update/compute branch power flows ----- Sf = V(branch(:, F_BUS)) .* conj(Yf * V) * baseMVA; %% complex power at "from" bus St = V(branch(:, T_BUS)) .* conj(Yt * V) * baseMVA; %% complex power injected at "to" bus branch(:, [PF, QF, PT, QT]) = [real(Sf) imag(Sf) real(St) imag(St)]; return;