Module idx_cost

source code

Defines constants for named column indices to gencost matrix.

Some examples of usage, after defining the constants using the line above, are:

   start = gencost[3, STARTUP]       # get startup cost of generator 4
   gencost[2, [MODEL, NCOST:COST+2]] = [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 1st column of cost parameters cost data defining total cost function For polynomial cost (highest order coeff first):

      e.g. cn, ..., c1, c0
   

   where the polynomial is c0 + c1*P + ... + cn*P^n For piecewise linear cost:

      x0, y0, x1, y1, x2, y2, ...
   

   where x0 < x1 < x2 < ... and the points (x0,y0), (x1,y1), (x2,y2), ... are the end- and break-points of the total cost function.

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