Partial shading efect in PV systems?

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Tony Castillo 2018-10-27

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https://ww2.mathworks.cn/matlabcentral/answers/426473-partial-shading-efect-in-pv-systems

回答： Joel Van Sickel 2020-9-2

Hi Ms all, I need help in order to understand better some issues that I am experiencing in my PV systems under partial shaded effect. however in order to overcome the issue that I am having, I have to make some queries to know how overpass the problems in my experimentation:

Item one Why in the Matlab model https://es.mathworks.com/examples/simpower/mw/sps_product-power_PVArray_PartialShading-partial-shading-of-a-pv-module there is not necessary a capacitor whereas in my model I have to attach a capacitor in between the Cell Array and a power DC-DC converter wether I want proof a MPPT, which is enterely necessary in order to implement a MPPT algorithm.
Item two how is connected the power DC-DC converter for testing an algorithm of MPPT?. The mayority of the examples under this effect does not depicts a model built in with a MPPT algorithm because of the lack of the DC-DC power converter.I hope you can give me some insights in order to overcome these issues.Best wishes!.

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Answer 1

Joel Van Sickel 2020-9-2

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Hello Tony,

as to 1: that particular solar panel model is modelled as a current source, so it cannot connect directly with an inductor. If this limiation is problematic, you can use the simscape solar cell instead, which will not have this issue: https://www.mathworks.com/help/physmod/sps/ref/solarcell.html. You will need to rebuild your models in simscape instead of specialized power systems.

2: please see this page: https://www.mathworks.com/solutions/power-electronics-control/mppt-algorithm.html

and then follow the link to this page for downloads of the actual algorithm: https://www.mathworks.com/campaigns/offers/mppt-algorithm-models.confirmation.html?elqsid=1599061450230&potential_use=Commercial&elqCampaignId=10588

Regards,

Joel