Prepared Prepared by: Tamer by: Tamer JaberJaber

AN-NAJAH NATIONAL UNIVERSITYFACULTY OF ENGNEERINGELECTRICAL DEPARTMENT

Supervised by:Prof. Marwan M.Mahmoud

2008-2009

• The project aims to measure the I-V The project aims to measure the I-V Characteristics of a solar cell & Characteristics of a solar cell &

module.module.

• This will be done using power This will be done using power electronic, PIC circuits and an electronic, PIC circuits and an Interface using C#.Interface using C#.

• It can be considered as a quality It can be considered as a quality and performance certificate for and performance certificate for each PV generatoreach PV generator

• Measuring and collecting current Measuring and collecting current

and voltage of the solar cell should and voltage of the solar cell should be large enough to be analyzed to be large enough to be analyzed to find the electric features of the find the electric features of the solar cellsolar cell

The interface

Available models

• Where (ts )is the time needed to measure the characteristics

• In the project we used a standard module (Siemens M53)(Vo.c=22v , Is.c=3.4A)• Number of capacitors were determined depending on the ratings of the module

• • Switches shown can be manual or automatic (transistors or relays)•RL to discharge the capacitors via S3•Rshunt to enable us to determine the current from voltage.

**How to measure the How to measure the Radiation:Radiation:

To measure the radiation we To measure the radiation we make an equivalent sensor make an equivalent sensor

consists of thin film cell with an consists of thin film cell with an adapter consists of two terminals adapter consists of two terminals

and a resistor 50Ω 1 wattand a resistor 50Ω 1 wattWe test this cell by comparing its We test this cell by comparing its reading in volts to the reading of reading in volts to the reading of solar meter and we find that the solar meter and we find that the relation is liner in this equation:relation is liner in this equation:

G= 227.6V- 69.62G= 227.6V- 69.62

**The scaling of Voltage and The scaling of Voltage and Current:Current:

we used a voltage divider circuit to we used a voltage divider circuit to regulate the voltage and OP-AMP regulate the voltage and OP-AMP

to amplify the currentto amplify the current

**The Temperature Sensor:The Temperature Sensor:we use (LM355) sensor to measure we use (LM355) sensor to measure

the ambient temperaturethe ambient temperature . .

ThankThank YouYou