gusucode.com > matpower工具箱源码程序 > matpower工具箱源码程序/MP2_0/makeB.m
function [Bp, Bpp] = makeB(baseMVA, bus, branch, alg) %MAKEB Builds the FDPF matrices, B prime and B double prime. % [Bp, Bpp] = makeB(baseMVA, bus, branch, alg) returns the two % matrices B prime and B double prime used in the fast decoupled power % flow. Does appropriate conversions to p.u. % 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 nb = size(bus, 1); %% number of buses nl = size(branch, 1); %% number of lines %% define named indices into bus, 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; [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; %%----- form Bp (B prime) ----- temp_branch = branch; %% modify a copy of branch temp_bus = bus; %% modify a copy of bus temp_bus(:, BS) = zeros(nb, 1); %% zero out shunts at buses temp_branch(:, BR_B) = zeros(nl, 1); %% zero out line charging shunts temp_branch(:, TAP) = ones(nl, 1); %% cancel out taps if alg == 2 %% if XB method temp_branch(:, BR_R) = zeros(nl, 1); %% zero out line resistance end Bp = -imag( makeYbus(baseMVA, temp_bus, temp_branch) ); %%----- form Bpp (B double prime) ----- temp_branch = branch; %% modify a copy of branch temp_branch(:, SHIFT) = zeros(nl, 1); %% zero out phase shifters if alg == 3 %% if BX method temp_branch(:, BR_R) = zeros(nl, 1); %% zero out line resistance end Bpp = -imag( makeYbus(baseMVA, bus, temp_branch) ); return;