PowerFactory offers intrinsic DSL 2-dimensional approximation functions: lapprox2 and sapprox2.

The attached project contains two DSL models for these two functions. The DSL Models are stored inside the grid and the outputs are defined as:

y = lapprox2(xl,xc,omatrix_a)

y = sapprox2(xl,xc,omatrix_a)

The matrix (omatrix_a) is defined within an external IntMat object, which must be stored inside the DSL Model (i.e., as a child object). Note that the matrix name has to match the string, following the “_”, "a" in this case.

There are additional functions for one dimensional look-up table: lapprox and sapprox. For more information refer to the User Manual.