RF Circuits for 5G Applications

13Design of Control Circuit for Mitigation of Shadow Effect in Solar Photovoltaic System

Dhvanit Bhavsar, Shubham Bhatt, Siddhi Vinayak Pandey and Alok Kumar Singh*

Department of Electrical Engineering, Adani Institute of Infrastructure Engineering, Ahmedabad, Gujarat, India

Abstract

The quadrant shifting from generation to power dissipation region due to shadow effects in solar photovoltaic affects the performance at module level. Furthermore, the decreased energy in any particular module creates a mismatch at the string level, and hence the overall system performance gets affected heavily. Techniques such as MPPT (Maximum Power Point Tracking), Bypass Diode, Bridge Linked (BL), Total Cross Tied (TCT), etc., are used to mitigate the shading effects up to some extent. Still, none of them are much effective in tackling this issue properly. In this manuscript, the module is divided into 18 small groups containing four cells each to mitigate the shading issue by bypassing the current at individual group level through help of MOSFET (Metal Oxide Semiconductor Field Effect Transistor) switches. If any group/s gets shaded, the controlled switches automatically perform an action based on the gate pulse given through the controller to bypass the shaded group from the circuit. The experimental results cause 27.78% and 55.56% more energy generation compared with conventional module architecture with 72 cells through the activation of one and two bypass diode respectively.

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