BUSTYPES Builds index lists for each type of bus (REF, PV, PQ). [REF, PV, PQ] = BUSTYPES(BUS, GEN) Generators with "out-of-service" status are treated as PQ buses with zero generation (regardless of Pg/Qg values in gen). Expects BUS and GEN have been converted to use internal consecutive bus numbering.
0001 function [ref, pv, pq] = bustypes(bus, gen) 0002 %BUSTYPES Builds index lists for each type of bus (REF, PV, PQ). 0003 % [REF, PV, PQ] = BUSTYPES(BUS, GEN) 0004 % Generators with "out-of-service" status are treated as PQ buses with 0005 % zero generation (regardless of Pg/Qg values in gen). Expects BUS and 0006 % GEN have been converted to use internal consecutive bus numbering. 0007 0008 % MATPOWER 0009 % Copyright (c) 1996-2016, Power Systems Engineering Research Center (PSERC) 0010 % by Ray Zimmerman, PSERC Cornell 0011 % 0012 % This file is part of MATPOWER. 0013 % Covered by the 3-clause BSD License (see LICENSE file for details). 0014 % See http://www.pserc.cornell.edu/matpower/ for more info. 0015 0016 %% constants 0017 [PQ, PV, REF, NONE, BUS_I, BUS_TYPE, PD, QD, GS, BS, BUS_AREA, VM, ... 0018 VA, BASE_KV, ZONE, VMAX, VMIN, LAM_P, LAM_Q, MU_VMAX, MU_VMIN] = idx_bus; 0019 [GEN_BUS, PG, QG, QMAX, QMIN, VG, MBASE, GEN_STATUS, PMAX, PMIN, ... 0020 MU_PMAX, MU_PMIN, MU_QMAX, MU_QMIN, PC1, PC2, QC1MIN, QC1MAX, ... 0021 QC2MIN, QC2MAX, RAMP_AGC, RAMP_10, RAMP_30, RAMP_Q, APF] = idx_gen; 0022 0023 %% get generator status 0024 % bus_gen_status = zeros(size(bus, 1), 1); 0025 % bus_gen_status(gen(:, GEN_BUS)) = gen(:, GEN_STATUS) > 0; 0026 nb = size(bus, 1); 0027 ng = size(gen, 1); 0028 Cg = sparse(gen(:, GEN_BUS), (1:ng)', gen(:, GEN_STATUS) > 0, nb, ng); %% gen connection matrix 0029 %% element i, j is 1 if, generator j at bus i is ON 0030 bus_gen_status = Cg * ones(ng, 1); %% number of generators at each bus that are ON 0031 0032 0033 %% form index lists for slack, PV, and PQ buses 0034 ref = find(bus(:, BUS_TYPE) == REF & bus_gen_status); %% reference bus index 0035 pv = find(bus(:, BUS_TYPE) == PV & bus_gen_status); %% PV bus indices 0036 pq = find(bus(:, BUS_TYPE) == PQ | ~bus_gen_status); %% PQ bus indices 0037 0038 %% pick a new reference bus if for some reason there is none (may have been shut down) 0039 if isempty(ref) 0040 % if isempty(pv) 0041 % %% no PV bus left to convert to reference bus 0042 % else 0043 ref = pv(1); %% use the first PV bus 0044 pv(1) = []; %% delete it from PV list 0045 % end 0046 end