I-V Curve tracer   

This project consists on the elaboration of a device that can plot an I-V graph to show the I-V relationship of silicon PV panels as an efficiency indicator. (EDITING)

Contents 1 Overview 2 I-V Curve 3 Design 3.1 Variable Load 3.2 I-V measurement 3.3 Data recollection 3.4 Curve Plot 4 Electronics and construction 5 Sample Data 6 Validation 7 Parts list 8 Operation Protocol 9 Open data access 10 References 11 Contact details

[edit] Overview

The measures of current and voltage from the PV taken by the device to plot the curve, must be recorded and transmitted to a data base on a computer through wireless means. The device must also be able to interrupt the panel load in order to measure current and voltage values, under different levels of sun irradiation.

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[edit] I-V Curve

The I-V curve of a PV device represents all the possible operation points of current and voltage for that device under a certain solar incidence and temperature. When the voltage is graphed as a function of current, a curve is obtained. In this curve maximum current is located where the graphic begins and voltage can be seen where the graphic ends. The maximum power point of the PV array is located in the "knee" of the curve. The PV can operate at any point of the curve, depending on the value of the load that it is connected to. The power produced by the PV is the product of both voltage and current values of each point of the curve.

[edit] Design

The device includes a series of subsystems, and together they make it possible to trace the curve.

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[edit] Variable Load

[edit] I-V measurement

[edit] Data recollection

For the data recollection,

[edit] Curve Plot

[edit] Electronics and construction

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[edit] Sample Data

[edit] Validation

[edit] Parts list

[edit] Operation Protocol

[edit] Open data access

[edit] References

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[edit] Contact details

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