Direct duty cycle control in MPPT

Hello ! I am generating a Vmpp using a Neural network and want the MPPT to output Vdc equivalent to this Vmpp. For this purpose I need to input a duty cycle into the Boost converter. I am using the formula d=1-(Vdc/Vmpp) But the duty cycle does not follow this formula and takes the value of the duty cycle to 1 (it always maxes out). Kindly guide me if I am using the right technique to control the Duty cycle or not

Answer 1

[Sebastian Castro]

Yeah, the problem here is you're measuring Vdc incorrectly.

Vdc isn't the measured DC link voltage on the output side... it's the DC voltage at the source (PV Array) on the left side of the boost converter.

- Sebastian

[Haider Agha]

Thank you very much Sebastian ! The boost is working fine now. I corrected the input measurement as you mentioned I need the system to reach the Vmpp value by altering the duty cycle. Is there any way to do this without using P&O ? Because P&O has its own drawbacks.

Thank you

[Sebastian Castro]

Sure there are!

http://ww1.microchip.com/downloads/en/AppNotes/00001521A.pdf

- Sebastian

[DAUDA DUNCAN]

I am building a Buck DC DC Converter but interfacing Neural Network Subsystem and the Converter is my challenge.

Please can anybody assist?

Answer 2

[Michael Osumune]

Hi,

I am really confused on how to create a custom neural network. Should I build it using neural network toolbox first then import or build while in simulink. Need help guys urgently.

Thanks

[Haider Agha]

You should build a custom neural network using the neural network toolbox first and then using "gensim" (generate simulink model) export it as a simulink component.

[DAUDA DUNCAN]

Hello Haider,

Please I want to interface my Neural Network Subsystem with my Buck Converter but the setting of the parameters in the Simulink is my big problem.

Please could you assist me?

[DAUDA DUNCAN]