Error search for PV system modelling in Simscape: Problems with the solar module configuration

Hello, my goal is to model a PV system in Simscape (including an inverter). The system consists of two strings on the roof, one facing east and the other facing west.

I keep having problems with the modelling and wonder if my implementation of the solar module configuration (based on the datasheet, model 430, (see datasheet.pdf) in the solar cell block is not correct. Because of these doubts, I am now starting from scratch.

I have taken the values from the datasheet and entered them into the solar cell block so that it represents one module. These modules are then connected in series, 18 per string (east and west).

My question is: Is there an error in my solar cell configuration or a mistake in my thinking, does anyone have experience in this area?

Answer 1

[Kothuri]

Hi Israfil-Cihan ,

The values you have entered for configuring the "Solar cell" seem correct. Here are the few steps you can follow:

• You have set the open-circuit voltage(Voc) to 39.16/108 which is true for 108 cells in series.
• In the "Panel Configuration" section, the number of series-connected cells should reflect the physical number of cells in the module if you're modeling one module as a single entity (e.g., 108).
• Ensure that the series-connected modules' parameters are consistent and accurately represent the combined Voc and Isc of each string.
• For 18 modules in series, the total Voc of each string would be 39.16 V×18.
• There should be two strings (east and west-facing), with 18 modules per string.

You can refer the below example for more info on implementation of Solar cell with inverter

https://www.mathworks.com/help/sps/ug/single-phase-grid-connected-in-pv-system.html?&s_tid=srchtitle_support_results_6_solar%20cell%20with%20inverter