1. GAIKWAD1, VAISHNAV2 AGRAVAT3
Poster ID: 4_4-0030
Photovoltaic Module PV-IV Curve Generator
with Shading Analysis in MATLAB
GAIKWAD1, VAISHNAV2 AGRAVAT3
1Gujarat Energy Research And Management Institute
2Gujarat Energy Research And Management Institute
3Gujarat Energy Research And Management Institute
Contact:
Results and Discussions:
Conclusion:
The results confirm the stability of the solution model developed in [1] for the four different photovoltaic material technologies.
Also, the shading and bypass diode effects can be analysed with the assumption that the bypass diode voltage drop is constant as mentioned in [2].
The GUI provides for an interactive way to study and visualize the PV-IV curves; as well as to take informed decisions for designing optimal number of cells per bypass diode.
References:
[1] Villalva, M. G., Gazoli, J. R., & Filho, E. R. (2009, May). Comprehensive Approach to Modeling andSimulation of Photovoltaic Arrays. IEEE TRANSACTIONS ON POWER ELECTRONICS, 24(5),
[2] Masters, G. M. (2004). Renewable and Efficient Electric Power Systems. Hoboken, New Jersey.: John Wiley & Sons.
Motivation:
To create a simple to use interface for generating P-V and I-V curves for a photovoltaic module/cell at different ambient irradiance and temperature values
To have a tool for simple shading analysis and computing the effect bypass diodes
Introduction:
The current equation of a photovoltaic cell is given by the following equation;
Solving the above equation is not straight forward as it is an implicit equation which is required to be solved iteratively to arrive at the solution. Moreover, the values of Rp, Rs and Io is not known prior to experiments. Hence, we have used a solution model proposed in [1] which utilises the three points on the IV curve of photovoltaic module, present in their datasheet i.e. short circuit current, open circuit voltage and maximum power point. This has been converted into a MATLAB GUI as shown in Fig. 1.
Developed GUI:
Fig. 3: I-V P-V Curves at Different Irradiances (200, 400, 600, 800 and 1000 W/m2).
Fig. 4: I-V P-V Curves at Different Temperatures (-25, 0, 25, 50 and 75 ºC). .
Fig. 5: I-V P-V Curves for different number of Shaded Cells (1, 5, 10, 20, 30).
Fig. 6: I-V P-V Curves for different number of cells connected across one Bypass
Diode (1,5,10,20,30).
Fig. 1: MATLAB GUI of the Application.
Select Module or Cell Mode
Enter Module/Cell Datasheet Information
Enter STC Temperature and Irradiance Values
Enter Ambient Temperature and Irradiance Values
Enter Shading Information
Press Normal to get P-V I-V Curves without Shading
Press Shading to get P-V I-V Curves with Shading
Fig. 2: Steps to use the Application.