I need an equation to calculate Vcell & Icell of PhotoVoltaic cell from varying Load Resistance.
In VisualBasic & Excel I have a simplified eqn for Icell from varying Vcell & it works ok. {Icell = CellIsc  (Io1 * (Exp(Vcell / PVt)))}. But I need to Vary Rload & output Icell & Vcell just like circuit simulation.(example attached)
In VB I can calculate Rload from: Vcell/Icell & it correlates (within scope of simplified eqn) to circuit simulation. But I can't get Rload > I & V equation with success of the non linear part.
I have simulate circuit in qucs for reference & outputs agree to real PV panel data.
In VisualBasic & Excel I have a simplified eqn for Icell from varying Vcell & it works ok. {Icell = CellIsc  (Io1 * (Exp(Vcell / PVt)))}. But I need to Vary Rload & output Icell & Vcell just like circuit simulation.(example attached)
In VB I can calculate Rload from: Vcell/Icell & it correlates (within scope of simplified eqn) to circuit simulation. But I can't get Rload > I & V equation with success of the non linear part.
I have simulate circuit in qucs for reference & outputs agree to real PV panel data.
Attachments

26.9 KB Views: 7