Home > matpower4.0 > extras > smartmarket > case2off.m

case2off

PURPOSE ^

CASE2OFF Creates quantity & price offers from gen & gencost.

SYNOPSIS ^

function [q, p] = case2off(gen, gencost)

DESCRIPTION ^

CASE2OFF  Creates quantity & price offers from gen & gencost.
   [Q, P] = CASE2OFF(GEN, GENCOST) creates quantity and price offers
   from case variables GEN & GENCOST.

   See also OFF2CASE.

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 function [q, p] = case2off(gen, gencost)
0002 %CASE2OFF  Creates quantity & price offers from gen & gencost.
0003 %   [Q, P] = CASE2OFF(GEN, GENCOST) creates quantity and price offers
0004 %   from case variables GEN & GENCOST.
0005 %
0006 %   See also OFF2CASE.
0007 
0008 %   MATPOWER
0009 %   $Id: case2off.m,v 1.14 2010/04/26 19:45:26 ray Exp $
0010 %   by Ray Zimmerman, PSERC Cornell
0011 %   Copyright (c) 1996-2010 by Power System Engineering Research Center (PSERC)
0012 %
0013 %   This file is part of MATPOWER.
0014 %   See http://www.pserc.cornell.edu/matpower/ for more info.
0015 %
0016 %   MATPOWER is free software: you can redistribute it and/or modify
0017 %   it under the terms of the GNU General Public License as published
0018 %   by the Free Software Foundation, either version 3 of the License,
0019 %   or (at your option) any later version.
0020 %
0021 %   MATPOWER is distributed in the hope that it will be useful,
0022 %   but WITHOUT ANY WARRANTY; without even the implied warranty of
0023 %   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
0024 %   GNU General Public License for more details.
0025 %
0026 %   You should have received a copy of the GNU General Public License
0027 %   along with MATPOWER. If not, see <http://www.gnu.org/licenses/>.
0028 %
0029 %   Additional permission under GNU GPL version 3 section 7
0030 %
0031 %   If you modify MATPOWER, or any covered work, to interface with
0032 %   other modules (such as MATLAB code and MEX-files) available in a
0033 %   MATLAB(R) or comparable environment containing parts covered
0034 %   under other licensing terms, the licensors of MATPOWER grant
0035 %   you additional permission to convey the resulting work.
0036 
0037 %% define named indices into data matrices
0038 [GEN_BUS, PG, QG, QMAX, QMIN, VG, MBASE, GEN_STATUS, PMAX, PMIN, ...
0039     MU_PMAX, MU_PMIN, MU_QMAX, MU_QMIN, PC1, PC2, QC1MIN, QC1MAX, ...
0040     QC2MIN, QC2MAX, RAMP_AGC, RAMP_10, RAMP_30, RAMP_Q, APF] = idx_gen;
0041 [PW_LINEAR, POLYNOMIAL, MODEL, STARTUP, SHUTDOWN, NCOST, COST] = idx_cost;
0042 
0043 %% do conversion
0044 oldgencost = gencost;
0045 i_poly = find(gencost(:, MODEL) == POLYNOMIAL);
0046 npts = 6;                   %% 6 points => 5 blocks
0047 %% convert polynomials to piece-wise linear by evaluating at zero and then
0048 %% at evenly spaced points between Pmin and Pmax
0049 if any(i_poly)
0050     [m, n] = size(gencost(i_poly, :));                              %% size of piece being changed
0051     gencost(i_poly, MODEL) = PW_LINEAR * ones(m, 1);                %% change cost model
0052     gencost(i_poly, COST:n) = zeros(size(gencost(i_poly, COST:n))); %% zero out old data
0053     gencost(i_poly, NCOST) = npts * ones(m, 1);                     %% change number of data points
0054     
0055     for i = 1:m
0056         ig = i_poly(i);     %% index to gen
0057         Pmin = gen(ig, PMIN);
0058         Pmax = gen(ig, PMAX);
0059         if Pmin == 0
0060             step = (Pmax - Pmin) / (npts - 1);
0061             xx = (Pmin:step:Pmax);
0062         else
0063             step = (Pmax - Pmin) / (npts - 2);
0064             xx = [0 Pmin:step:Pmax];
0065         end
0066         yy = totcost(oldgencost(ig, :), xx);
0067         gencost(ig,     COST:2:(COST + 2*(npts-1)    )) = xx;
0068         gencost(ig, (COST+1):2:(COST + 2*(npts-1) + 1)) = yy;
0069     end
0070 end
0071 n = max(gencost(:, NCOST));
0072 xx = gencost(:,     COST:2:( COST + 2*n - 1 ));
0073 yy = gencost(:, (COST+1):2:( COST + 2*n     ));
0074 i1 = 1:(n-1);
0075 i2 = 2:n;
0076 q = xx(:, i2) - xx(:, i1);
0077 p = ( yy(:, i2) - yy(:, i1) ) ./ q;

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