I-V curve for photovoltaic problem

[KenLabView]

I would like to generate few IV curves for a photovoltaic system based on the values of Isc saved in a spreadsheet file.. i can generate the curves but accoring to matlab the proper curve should end at Voc = 0.6139V (i.e when Voltage is 0.6139 V I = 0A) but my when my V =0.6139 V the I value seems different..cant figure out where i am going wrong..any help on this matter is appreciated.. the VI, datasheet and the equation is attached

Voc = 0.6139V
Vt= 0.026V

[Van_L]

Hi Ken,

I briefly looked over your code and the formula you are using.
I believe this application is better implemented using labVIEW built in Formula Nodes Mathematics>>scripts & formulas of the functions palette (more info here too)
It's often used when users have complicated mathematical formulas.
It uses c like text based language to quickly calculate your desired formula. It makes it a lot more readible, scalible and maintainable.

Please take a look. it should make your code cleaner too

[BMac]

We recently published a free downloadable LabVIEW toolkit for solar cell I-V characterization. It is also accompanied by a series of application notes on photovoltaic testing principals and theory. I hope that's useful-- best of luck with your research.

http://www.ni.com/greenengineering/renewable_energy/solar.htm

[S.AHMAD]

Hi ,

When I run your VI I found out that It is 0 at 0.61 but due to the floating point it will show -0.0609.I attached the screen shoot of the VI.If not you try to use the formual script to test it out.

Regards.

S.Ahmad.

[smercurio_fc]

Note: You are responding to a thread that's over one and half years old.