how to make AC or DC load vary on simulink?

I am making a HESS (hybrid energy system storage) project based on battery supercapacitors on stand alone PV, but I am confused about how to make the load change when the program is running, I am using version 2018b and 2023b, in version 2018b there is no variable load, but in 2023b there is a ‘dynamic load’ variable load that can be used as an AC or DC load, but I cannot connect the port of the block to my DC bus, is there a solution or suggestion?

[Walter Roberson]

I suspect that on one side you have Simscape Electric blocks, and on the other side you have Simscape Electric Specialized Power System blocks. Specialized Power Systems is a seperate Simscape domain from regular Simscape Electric, and the two cannot be connected together without using convertor blocks.

[Muhammad]

You are right my friend. is there any solution how to make a variable load that can be connected to the PV system?

Answer 1

[Javier Gazzarri]

Hello Muhammad,

Please let me know if this is an acceptable to you:

1) Connect the load signal to the MULTIPLY port of a Divide block

2) Measure the PV voltage and connect the voltage to the DIVIDE port of the Divide block

3) Connect the output of the divide block to a Controlled Current Source block and connect the latter to the PV

4) Add a 1/z or transfer function to the loop above if it generates an algebraic loop

Hope this helps.

Javier