Page 52 - CITS - Electrician - Trade Practical

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ELECTRICIAN - CITS

EXERCISE 19 : To connect and test solar cells / PV

models in series & parallel for given power

Objectives

At the end of this exercise you shall be able to
• identify & study the construction of solar cells / PV modules, and check the rating
• calculate the requirement of No. of solar cells to obtain the required power output
• connect the solar cells / PV modules in series & parallel
• measure the open circuit voltage & short circuit current of solar cells / PV modules and calculate the power
output.

Requirements

Tools/Equipments/Instruments
• Combination plier (165mm, insulated) - 1 No. • Ammeter (MC, 0-5 Amp) - 1 No.
• Screw Driver (150mm, insulated stem) - 1 No. • Rheostat / Potentiometer (0-100 Ω) - 1 No.
• Neon Tester (75mm, 500 V) - 1 No. • Soldering iron with stand
• Electrician knife (Insulated) - 1 No. (60 W, 230 V) - 1 No.
• Wire striper (100 mm) - 1 No. Materials/Components
• Solar PV modules (12 V, 16W) - 6 Nos. • Solar connector with cable
• Solar spot light with radiation (MC 3/T4) - 10 set.
control (200 W, 230 V) - 1 No. • PVC copper wire (4.0 sq.mm) - 2 meter.
• Multi meter (Digital, 31/2 digit) - 1 No. • Soldering lead & flux - As reqd.
• Voltmeter (MC, 0-100V) - 1 No. • Cotton waste - As reqd.

Procedure

Solar cells / PV modules and power output
When sun light / natural light falls on solar cells the light energy is converted into Electrical energy and causing
electricity to flow. The electrical output is depends upon many factors like - No. of solar cells, type of connection,
size of solar PV modules, irradiation and weather conditions.
The electrical power output of solar cells/PV modules is calculated by the product of open circuit voltage (VOC)
and short circuit current (ISC) (peak value current)
The solar cells/PV modules are connected in both series and parallel connection depends upon No. of strings and
arrays as per required power output.
For this experiment the given data is,
Required power output is 50 watts
No. of solar PV models & rating = 3 No’s of PV modules of 12 V, 16 W (16 W x 3 = 48 watts)
(6 No’s of PV modules of 12 V, 16 W for parallel connection)
TASK 1 :Identify the solar cells and check the rating
1 Draw the circuit diagram of connection of solar cells in series & parallel.

2 Check and study the construction, voltage & power rating of solar PV modules.
3 Calculate the required power output as the ratings of solar PV modules.
4 Arrange the experiment set up with solar PV modules, solar spot light and meters on wooden table.

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