Home > matpower6.0 > add_userfcn.m

add_userfcn

PURPOSE ^

ADD_USERFCN Appends a userfcn to the list to be called for a case.

SYNOPSIS ^

function mpc = add_userfcn(mpc, stage, fcn, args, allow_multiple)

DESCRIPTION ^

ADD_USERFCN   Appends a userfcn to the list to be called for a case.

   MPC = ADD_USERFCN(MPC, STAGE, FCN)
   MPC = ADD_USERFCN(MPC, STAGE, FCN, ARGS)
   MPC = ADD_USERFCN(MPC, STAGE, FCN, ARGS, ALLOW_MULTIPLE)

   A userfcn is a callback function that can be called automatically by
   MATPOWER at one of various stages in a simulation.

   MPC   : the case struct
   STAGE : the name of the stage at which this function should be
           called: ext2int, formulation, int2ext, printpf
   FCN   : the name of the userfcn
   ARGS  : (optional) the value to be passed as an argument to the
           userfcn (typically a struct)
   ALLOW_MULTIPLE : (optional) if TRUE, allows the same function to
          be added more than once.

   Currently there are 5 different callback stages defined. Each stage has
   a name, and by convention, the name of a user-defined callback function
   ends with the name of the stage. The following is a description of each
   stage, when it is called and the input and output arguments which vary
   depending on the stage. The reserves example (see RUNOPF_W_RES) is used
   to illustrate how these callback userfcns might be used.

   1. ext2int

   Called from EXT2INT immediately after the case is converted from
   external to internal indexing. Inputs are a MATPOWER case struct (MPC),
   freshly converted to internal indexing and any (optional) ARGS value
   supplied via ADD_USERFCN. Output is the (presumably updated) MPC. This is
   typically used to reorder any input arguments that may be needed in
   internal ordering by the formulation stage.

   E.g. mpc = userfcn_reserves_ext2int(mpc, args)

   2. formulation

   Called from OPF after the OPF Model (OM) object has been initialized
   with the standard OPF formulation, but before calling the solver. Inputs
   are the OM object and any (optional) ARGS supplied via ADD_USERFCN.
   Output is the OM object. This is the ideal place to add any additional
   vars, constraints or costs to the OPF formulation.

   E.g. om = userfcn_reserves_formulation(om, args)

   3. int2ext

   Called from INT2EXT immediately before the resulting case is converted
   from internal back to external indexing. Inputs are the RESULTS struct
   and any (optional) ARGS supplied via ADD_USERFCN. Output is the RESULTS
   struct. This is typically used to convert any results to external
   indexing and populate any corresponding fields in the RESULTS struct.

   E.g. results = userfcn_reserves_int2ext(results, args)

   4. printpf

   Called from PRINTPF after the pretty-printing of the standard OPF
   output. Inputs are the RESULTS struct, the file descriptor to write to,
   a MATPOWER options struct, and any (optional) ARGS supplied via
   ADD_USERFCN. Output is the RESULTS struct. This is typically used for
   any additional pretty-printing of results.

   E.g. results = userfcn_reserves_printpf(results, fd, mpopt, args)

   5. savecase

   Called from SAVECASE when saving a case struct to an M-file after
   printing all of the other data to the file. Inputs are the case struct,
   the file descriptor to write to, the variable prefix (typically 'mpc.')
   and any (optional) ARGS supplied via ADD_USERFCN. Output is the case
   struct. This is typically used to write any non-standard case struct
   fields to the case file.

   E.g. mpc = userfcn_reserves_printpf(mpc, fd, prefix, args)

   See also RUN_USERFCN, REMOVE_USERFCN, TOGGLE_RESERVES, TOGGLE_IFLIMS,
   TOGGLE_DCLINE, TOGGLE_SOFTLIMS, and RUNOPF_W_RES.

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 function mpc = add_userfcn(mpc, stage, fcn, args, allow_multiple)
0002 %ADD_USERFCN   Appends a userfcn to the list to be called for a case.
0003 %
0004 %   MPC = ADD_USERFCN(MPC, STAGE, FCN)
0005 %   MPC = ADD_USERFCN(MPC, STAGE, FCN, ARGS)
0006 %   MPC = ADD_USERFCN(MPC, STAGE, FCN, ARGS, ALLOW_MULTIPLE)
0007 %
0008 %   A userfcn is a callback function that can be called automatically by
0009 %   MATPOWER at one of various stages in a simulation.
0010 %
0011 %   MPC   : the case struct
0012 %   STAGE : the name of the stage at which this function should be
0013 %           called: ext2int, formulation, int2ext, printpf
0014 %   FCN   : the name of the userfcn
0015 %   ARGS  : (optional) the value to be passed as an argument to the
0016 %           userfcn (typically a struct)
0017 %   ALLOW_MULTIPLE : (optional) if TRUE, allows the same function to
0018 %          be added more than once.
0019 %
0020 %   Currently there are 5 different callback stages defined. Each stage has
0021 %   a name, and by convention, the name of a user-defined callback function
0022 %   ends with the name of the stage. The following is a description of each
0023 %   stage, when it is called and the input and output arguments which vary
0024 %   depending on the stage. The reserves example (see RUNOPF_W_RES) is used
0025 %   to illustrate how these callback userfcns might be used.
0026 %
0027 %   1. ext2int
0028 %
0029 %   Called from EXT2INT immediately after the case is converted from
0030 %   external to internal indexing. Inputs are a MATPOWER case struct (MPC),
0031 %   freshly converted to internal indexing and any (optional) ARGS value
0032 %   supplied via ADD_USERFCN. Output is the (presumably updated) MPC. This is
0033 %   typically used to reorder any input arguments that may be needed in
0034 %   internal ordering by the formulation stage.
0035 %
0036 %   E.g. mpc = userfcn_reserves_ext2int(mpc, args)
0037 %
0038 %   2. formulation
0039 %
0040 %   Called from OPF after the OPF Model (OM) object has been initialized
0041 %   with the standard OPF formulation, but before calling the solver. Inputs
0042 %   are the OM object and any (optional) ARGS supplied via ADD_USERFCN.
0043 %   Output is the OM object. This is the ideal place to add any additional
0044 %   vars, constraints or costs to the OPF formulation.
0045 %
0046 %   E.g. om = userfcn_reserves_formulation(om, args)
0047 %
0048 %   3. int2ext
0049 %
0050 %   Called from INT2EXT immediately before the resulting case is converted
0051 %   from internal back to external indexing. Inputs are the RESULTS struct
0052 %   and any (optional) ARGS supplied via ADD_USERFCN. Output is the RESULTS
0053 %   struct. This is typically used to convert any results to external
0054 %   indexing and populate any corresponding fields in the RESULTS struct.
0055 %
0056 %   E.g. results = userfcn_reserves_int2ext(results, args)
0057 %
0058 %   4. printpf
0059 %
0060 %   Called from PRINTPF after the pretty-printing of the standard OPF
0061 %   output. Inputs are the RESULTS struct, the file descriptor to write to,
0062 %   a MATPOWER options struct, and any (optional) ARGS supplied via
0063 %   ADD_USERFCN. Output is the RESULTS struct. This is typically used for
0064 %   any additional pretty-printing of results.
0065 %
0066 %   E.g. results = userfcn_reserves_printpf(results, fd, mpopt, args)
0067 %
0068 %   5. savecase
0069 %
0070 %   Called from SAVECASE when saving a case struct to an M-file after
0071 %   printing all of the other data to the file. Inputs are the case struct,
0072 %   the file descriptor to write to, the variable prefix (typically 'mpc.')
0073 %   and any (optional) ARGS supplied via ADD_USERFCN. Output is the case
0074 %   struct. This is typically used to write any non-standard case struct
0075 %   fields to the case file.
0076 %
0077 %   E.g. mpc = userfcn_reserves_printpf(mpc, fd, prefix, args)
0078 %
0079 %   See also RUN_USERFCN, REMOVE_USERFCN, TOGGLE_RESERVES, TOGGLE_IFLIMS,
0080 %   TOGGLE_DCLINE, TOGGLE_SOFTLIMS, and RUNOPF_W_RES.
0081 
0082 %   MATPOWER
0083 %   Copyright (c) 2009-2016, Power Systems Engineering Research Center (PSERC)
0084 %   by Ray Zimmerman, PSERC Cornell
0085 %
0086 %   This file is part of MATPOWER.
0087 %   Covered by the 3-clause BSD License (see LICENSE file for details).
0088 %   See http://www.pserc.cornell.edu/matpower/ for more info.
0089 
0090 if nargin < 5
0091     allow_multiple = 0;
0092     if nargin < 4
0093         args = [];
0094     end
0095 end
0096 switch stage
0097     case {'ext2int', 'formulation', 'int2ext', 'printpf', 'savecase'}
0098         %% ok
0099     otherwise
0100         error('add_userfcn : ''%s'' is not the name of a valid callback stage\n', stage);
0101 end
0102 
0103 n = 1;
0104 if isfield(mpc, 'userfcn')
0105     if isfield(mpc.userfcn, stage)
0106         n = length(mpc.userfcn.(stage)) + 1;
0107         if ~allow_multiple
0108             if have_fcn('octave')
0109                 fcn_info = functions(fcn);
0110                 for k = 1:n-1
0111                     cb_info = functions(mpc.userfcn.(stage)(k).fcn);
0112                     if strcmp(cb_info.function, fcn_info.function)
0113                         error('add_userfcn: the function ''%s'' has already been added', func2str(fcn));
0114                     end
0115                 end
0116             else
0117                 for k = 1:n-1
0118                     if isequal(mpc.userfcn.(stage)(k).fcn, fcn)
0119                         error('add_userfcn: the function ''%s'' has already been added', func2str(fcn));
0120                     end
0121                 end
0122             end
0123         end
0124     end
0125 end
0126 
0127 mpc.userfcn.(stage)(n).fcn = fcn;
0128 if ~isempty(args)
0129     mpc.userfcn.(stage)(n).args = args;
0130 end

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