I have a PV array at the output terminal of which I have connected a Controlled voltage source. The controlled voltage source has been used instead of a variable resistor (in practical testing of PV module) to provide a range of voltage starting from zero to the open circuit voltage so that I will be able to plot the V-I and P-V characteristics. Now to use MPPT algorithm I need Vpv and Ipv which I provide from the output of the PV module to a MATLAB function block inside which I have written the codes of P&O algorithm. Now as I understand I should get the voltage corresponding to Maximum Power Point which a constant value. However, I got something else which I did't expect.So someone please help me out here to get the necessary curve. Please suggest some rectification in my MATLAB codes for MPPT. I am sharing my simulink model as well as the .m file .
Hello Anirudh, first of all, the Vmpp is not a constant and its value depends on the temperature and the radiation, so your Vmpp changes as the radiation and the temperature change. However, if your radiation and temperature are constant it definitely will be constant.
As I knew from you that you are applying voltage bias on your PV module so as you change this voltage the current will change accordingly. This voltage source will inject current into your system and I think the best way is to use a variable resistor capable of absorbing the max power of your PV or use DC/DC converter.
I hope this will help you, you can check the following publications for more details.
https://www.researchgate.net/publication/283509221_Simulink_Implementation_of_Direct-Coupled_PV_System
https://www.researchgate.net/publication/283053805_Simulink_Model_of_Photovoltaic_Module
https://www.researchgate.net/publication/294086301_Modeling_Simulation_Analysis_and_Control_of_Stand-alone_PV_System
Best Regards
Data Simulink Implementation of Direct-Coupled PV System
Data Simulink Model of Photovoltaic Module
Conference Paper Modeling, Simulation, Analysis and Control of Stand-alone PV System
Thank you Ashraf . I have considered a constant operating condition(Insolation and Temperature being constant) with the controlled voltage source to represent the variable resistor. Now can you tell me what should I expect at the output of MPPT ? I would like to request you look at my simulation file and codes for MPPT which I have attached to my previous question. Kindly help me.
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