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function [PW_LINEAR, POLYNOMIAL, MODEL, STARTUP, SHUTDOWN, NCOST, COST] = idx_cost %IDX_COST Defines constants for named column indices to gencost matrix. % Example: % % [PW_LINEAR, POLYNOMIAL, MODEL, STARTUP, SHUTDOWN, NCOST, COST] = idx_cost; % % Some examples of usage, after defining the constants using the line above, % are: % % start = gencost(4, STARTUP); % get startup cost of generator 4 % gencost(2, [MODEL, NCOST:COST+1]) = [ POLYNOMIAL 2 30 0 ]; % % set the cost of generator 2 to a linear function COST = 30 * Pg % % The index, name and meaning of each column of the gencost matrix is given % below: % % columns 1-5 % 1 MODEL cost model, 1 = piecewise linear, 2 = polynomial % 2 STARTUP startup cost in US dollars % 3 SHUTDOWN shutdown cost in US dollars % 4 NCOST number of cost coefficients to follow for polynomial cost % function, or number of data points for piecewise linear % 5 COST parameters defining total cost function begin in this col % (MODEL = 1) : p0, f0, p1, f1, ..., pn, fn % where p0 < p1 < ... < pn and the cost f(p) is defined % by the coordinates (p0,f0), (p1,f1), ..., (pn,fn) of % the end/break-points of the piecewise linear cost % (MODEL = 2) : cn, ..., c1, c0 % n+1 coefficients of an n-th order polynomial cost fcn, % starting with highest order, where cost is % f(p) = cn*p^n + ... + c1*p + c0 % % additional constants, used to assign/compare values in the MODEL column % 1 PW_LINEAR piecewise linear generator cost model % 2 POLYNOMIAL polynomial generator cost model % % See also DEFINE_CONSTANTS. % MATPOWER % $Id: idx_cost.m,v 1.12 2010/05/27 14:29:05 ray Exp $ % by Ray Zimmerman, PSERC Cornell % Copyright (c) 1996-2010 by Power System Engineering Research Center (PSERC) % % This file is part of MATPOWER. % See http://www.pserc.cornell.edu/matpower/ for more info. % % MATPOWER is free software: you can redistribute it and/or modify % it under the terms of the GNU General Public License as published % by the Free Software Foundation, either version 3 of the License, % or (at your option) any later version. % % MATPOWER is distributed in the hope that it will be useful, % but WITHOUT ANY WARRANTY; without even the implied warranty of % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the % GNU General Public License for more details. % % You should have received a copy of the GNU General Public License % along with MATPOWER. If not, see <http://www.gnu.org/licenses/>. % % Additional permission under GNU GPL version 3 section 7 % % If you modify MATPOWER, or any covered work, to interface with % other modules (such as MATLAB code and MEX-files) available in a % MATLAB(R) or comparable environment containing parts covered % under other licensing terms, the licensors of MATPOWER grant % you additional permission to convey the resulting work. %% define cost models PW_LINEAR = 1; POLYNOMIAL = 2; %% define the indices MODEL = 1; %% cost model, 1 = piecewise linear, 2 = polynomial STARTUP = 2; %% startup cost in US dollars SHUTDOWN = 3; %% shutdown cost in US dollars NCOST = 4; %% number breakpoints in piecewise linear cost function, %% or number of coefficients in polynomial cost function COST = 5; %% parameters defining total cost function begin in this col %% (MODEL = 1) : p0, f0, p1, f1, ..., pn, fn %% where p0 < p1 < ... < pn and the cost f(p) is defined %% by the coordinates (p0,f0), (p1,f1), ..., (pn,fn) of %% the end/break-points of the piecewise linear cost %% (MODEL = 2) : cn, ..., c1, c0 %% n+1 coefficients of an n-th order polynomial cost fcn, %% starting with highest order, where cost is %% f(p) = cn*p^n + ... + c1*p + c0