Downloads: 2 | Views: 31 | Weekly Hits: ⮙1 | Monthly Hits: ⮙1

Review Papers | Energy Engineering | Madagascar | Volume 13 Issue 1, January 2024

Study of the Behavior of Photovoltaic Systems under the Influence of Shading and Various Bypass Diodes Configurations

Andriamberomanga Simon Merthon | Ramahaleomiarantsoa Fanjason Jacques | Razafimahenina Jean Marie

Abstract: The I-V characteristic curve of a photovoltaic module is impacted by shadows, depending on the shaded area of the PV module and the radiation received by the shaded areas. Another factor influencing the shape of the I-V curve of a PV module is the configuration of the electrical connection between its cells and bypass diodes. Bypass diodes are installed in the modules to prevent power loss when they are shaded or damaged; they also prevent cells from operating near the avalanche zone. This paper investigates the performance of a photovoltaic array, which comprises interconnected modules. Specifically, the configuration with overlapping bypass diodes is analyzed, demonstrating that completely or partially shaded modules may consume some of the power generated by other modules in the PV array. This effect is also evident in low-power PV arrays. In such cases, the power dissipated by a diode is small, but with many diodes, the cumulative power dissipation can be comparable to the power produced by various PV modules. Additionally, this article explores the impact of the inverter on Maximum Power Point (MPP) tracking.

Keywords: Behavior PV arrays, shadows, bypass diode

Edition: Volume 13 Issue 1, January 2024,

Pages: 1460 - 1466