Message by michel kruger: Hello everybody,
I have this text file to define the interconnectors potential evolution over the solar panel:

Effective area ratio (geometric only) solar array at 0 degrees

# Basis definition

-0.0 0.0 0.5
1.0 0.0 0.0
0.0 1.0 0.0

Array definition (x0,y0,x1,y1,V0,dV/dx,dV/dy)

-0.48 1.39 0.48 3.13 50 0.0 0.0
Array definition is nothing but the coordinates and the voltage bus of the solar panel.
Apparently the 1st matrix (# Basis definition) defines the potential evolution and the distribution over the panel. Can anybody explain how ??
I would really appreciate.
Thank you very much!!!
Best Regards,
Michel

Message by Pierre Sarrailh:
Hello Michel,
The array definition defines the potential of a 2D flat surface in the plane (X,Y).
But in a general case, the solar array may not be in the (X,Y) plane.
For example if your solar pane is in the (Y,Z) plane, you ave to define the orientation (i.e. the orthogonal basis) of the array definition.In this case (Y,Z oriented solar array), it should be:

0.0 1.0 0.0 (the X vector of the basis in the GMSH reference - that corresponds to the Y vector of GMSH)
0.0 0.0 1.0 (the Y vector of the basis in the GMSH reference - that corresponds to the Z vector of GMSH)
1.0 0.0 0.0 (the Z vector of the basis in the GMSH reference - that corresponds to the X vector of GMSH)

Another example, if the solar array is inclined at +45° in the (Y,Z) plane, the natural basis to define the potential distribution should be:

0.0 0.7 0.7
0.0 -0.7 0.7
1.0 0.0 0.0

In the general case, you can keep:

1.0 0.0 0.0
0.0 1.0 0.0
0.0 0.0 1.0

That means the basis of reference of the solar array for the potential distribution is the same as GMSH basis.
Regards,
Pierre

Message by Pierre Sarrailh:
Hi,
I get different feedbacks on my post concerning the basis that it is required to define in the input file of the interconnector interactor.
Effectively, my answer is not complete because I answer only on the theory of the basis orientation and I don’t answer to what the user has to enter in SPIS.
The basis definition in the input files does not mean only the orientation of the solar array (X,Y,Z). I explain only the basis orientation in my previous post.
The input file defines a 2D basis of a solar array (O,X,Y) with an origin and 2 vectors (the third direction is implicit, deduced from X an Y assuming an orthonormal basis).
If you want to keep with the standard base of GMSH, you have to enter:

Basis definition

0.0 0.0 0.0
1.0 0.0 0.0
0.0 1.0 0.0
(The Z direction compute by SPIS is (0.0 0.0 1.0))
Sorry If my post was confusing for most of you.
Regards,Pierre