How to input values from workspace to PV array Block?

I have currently created a simple model containing the PV array block from library location - Simscape / Electrical / Specialized Power Systems / Renewables / Solar, I am trying to input the specifications of the module data for the 'Voc' using a variable (ie. Volt_oc) from the Workspace. But when i do so i am getting this error:

or if i use the 'set_param' command in script i am getting this error also:

It works perfectly fine if i was to input a number into the PV array block, but as i have a loop containing multiple values to simulate, i would like to use a variable from the workspace to minise human interaction.

[Fangjun Jiang]

What number did you put in that makes it work fine?

What variable and what its value did you try to put in?

[Jack Danby]

If i were to place any number it will work, or if i place anything in there that is not a number, i have tried multiple variables and nothing is accepted, i am getting this error when i press apply

Answer 1

[Naveen Venkata Krishnan]

Hello Jack ,

From the question I understood that you are changing the "Module" in the "Module data" of the PV array to unser defined thereby you can define a new PV module and assuming that you might be using MATLAB 2019a

Module data -> Module -> user defined.

The PV array module that you are using is a masked block, it has it's own workspace hence directly giving varible values from Base work space.

In order to read the data from the base workspace follow these steps :

1 . In the field where the value has to be accessed from workspace ( here open circuit voltage )

2 . Then click on "Voc: Create..." which will lead you to this

Enter the value( < expression > , here I have given it an intial value of 40 ) you want to assign to the variable in workspace "Voc" and then press create

3 . This will create a variable Voc in work space as shown

This variable can now be called from SIMULINK as any other MATLAB variable

[adham osama]

The problem is the need to use variables directly from matlab base workspace which has been initialized in an m-file, for example.

Example: these variables are defined in an m-file

I_sc = 4.37;                                        % [A]
V_oc = 42.93;                                        % [V]

using a variable name for Ncell generates another error : Matrix dimensions must agree

Btw, same error occurs when using your method and tring to click "apply".