How can I generate a grid schematic in MATLAB?

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Roel on 29 Jul 2014

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Commented: Roel on 30 Jul 2014

Hi guys, I am currently working on a GUI to model the effects of low temperature on a PV array. The GUI (as made from the GUIDE) as of now takes in user inputs from text boxes in order to change some of the parameters of the PV modules (such as short circuit current and ideality factor).

However, the GUI ideally should be able to output a grid of cells whose dimensions correspond to however many cells are wired in series and in parallel. The user would then click on individual cells and be able to change the individual characteristics of each cell and view its IV curve.

How can you generate a grid of images that can change according to user input? For example if the user states that there are 2 rows of 5 cells wired in series connected to each other in parallel, the GUI will display a 2x5 array of cells. I have the actual equations written for manipulating the IV curves already written but I don't know how to generate this grid of cells.

Thanks in advance!

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Sara on 29 Jul 2014

What do you need to plot the cells for? Are they editable or is that just an image? Do you want to show connections among them too? can you attach an image of what you want (done in power point, or paint, or by hand and scanned,..., nothing fancy needed)?

Roel on 29 Jul 2014

Edited: Roel on 29 Jul 2014

photo-12.JPG

Something like this, it should just be an image (not editable), but the actual array should change. For example, I have attached a 3x5 array. I would want this to also generate a 4x5 and any n x m array.

Each of the individual cells can be selected by the user and have its individual IV curve and parameters shown/edited.

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Sara on 29 Jul 2014

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Take a look at the code. nrow and ncol will be your adjustable inputs. Now the code wait for the user to click on the image (ginput); you can change that behavior by checking the mouse click. It really depends on what you want to do.

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Roel on 30 Jul 2014

IVCallback.m

I have attached the .m file of what I currently have for manipulating the IV curves. Sorry for being vague. So in lines 71 and 90 I replicate the matrix for current and voltage respectively in order to model how the IV curves change according to how many cells are in series and in parallel.

I would like to be able to do the following: So initially I replicate the IV characteristics of an ideal solar cell according to how many cells (in series and parallel) are in the array. The user can then select one cell in the array, and then change its characteristics (ideality factor, Series Resistance, short circuit current, etc.). For example say we have 3 identical cells wired in series with Series Resistance of [0 0 0] (vector input for the 3 junctions of the solar cell model I'm using) ohms each. I would like to plot the IV curve of this array under these conditions. Then I would want to change the 2nd cell to have a series resistance of [0 0.2 0] and plot the IV curve of the array under those conditions. How would I do this

Sara on 30 Jul 2014

Ok, it took me a while but I finally understood. So, where do you load a default size of the array + default values that the user can change in your code?

Roel on 30 Jul 2014

As of now they don't have default values, the user would input the values according to the type of solar cell they are working with. But soon I will set it to the default values of the type of cells we use in our lab, which is:

Series res: [0 0 0] Shunt res: [10000 10000 10000] Short circuit current: [1.8 1.9 3] Open circuit voltage: [1.4 1 0.3] Ideality factor: [3 3 3]

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