TOTCOST Computes total cost for generators at given output level. TOTALCOST = TOTCOST(GENCOST, PG) computes total cost for generators given a matrix in gencost format and a column vector or matrix of generation levels. The return value has the same dimensions as PG. Each row of GENCOST is used to evaluate the cost at the points specified in the corresponding row of PG.
0001 function totalcost = totcost(gencost, Pg) 0002 %TOTCOST Computes total cost for generators at given output level. 0003 % TOTALCOST = TOTCOST(GENCOST, PG) computes total cost for generators given 0004 % a matrix in gencost format and a column vector or matrix of generation 0005 % levels. The return value has the same dimensions as PG. Each row 0006 % of GENCOST is used to evaluate the cost at the points specified in the 0007 % corresponding row of PG. 0008 0009 % MATPOWER 0010 % Copyright (c) 1996-2016, Power Systems Engineering Research Center (PSERC) 0011 % by Ray Zimmerman, PSERC Cornell 0012 % & Carlos E. Murillo-Sanchez, PSERC Cornell & Universidad Nacional de Colombia 0013 % 0014 % This file is part of MATPOWER. 0015 % Covered by the 3-clause BSD License (see LICENSE file for details). 0016 % See http://www.pserc.cornell.edu/matpower/ for more info. 0017 0018 [PW_LINEAR, POLYNOMIAL, MODEL, STARTUP, SHUTDOWN, NCOST, COST] = idx_cost; 0019 0020 [ng, m] = size(gencost); 0021 totalcost = zeros(ng, size(Pg, 2)); 0022 0023 if ~isempty(gencost) 0024 ipwl = find(gencost(:, MODEL) == PW_LINEAR); 0025 ipol = find(gencost(:, MODEL) == POLYNOMIAL); 0026 if ~isempty(ipwl) 0027 x = gencost(:, COST:2:(m-1)); 0028 y = gencost(:, (COST+1):2:m); 0029 for i = ipwl' 0030 if gencost(i, NCOST) > 0 0031 % totalcost(i,:) = interp1(x(i, 1:gencost(i, NCOST)), ... 0032 % y(i, 1:gencost(i, NCOST)), ... 0033 % Pg(i,:), 'linear', 'extrap'); 0034 j1 = 1:(gencost(i, NCOST) - 1); j2 = 2:gencost(i, NCOST); 0035 pp = mkpp(x(i, 1:gencost(i, NCOST))', [(y(i,j2) - y(i,j1)) ./ (x(i,j2) - x(i,j1)); y(i,j1)]'); 0036 totalcost(i,:) = ppval(pp, Pg(i,:)); 0037 end 0038 end 0039 end 0040 for i = 1:size(totalcost, 2) 0041 totalcost(ipol, i) = polycost(gencost(ipol, :), Pg(ipol, i)); 0042 end 0043 end