Modelling and Analysis of PV array Connections under Non-Uniform Irradiance Conditions

Abstract

Partial shading is the most significant factor affecting the PV array's maximum power production. Interconnection between PV modules in different styles inside the array is one way to mitigate this issue. The literature reported that PV modules can be connected in 'simple-series (SS), series-parallel (SP), total-cross-tied (TCT), bridge-link (BL) and honey-comb (HC)' ways to reduce partial shadings. Under the influence of shading, however, the modelling and analysis of PV array connections is a difficult task. Therefore, this work presents modelling and analysis of PV array connections under partial shadings. The performance of each PV array connection is analysed under different shading conditions on 9\times 9 array in this work, and further, comparative study has been performed by obtained various index parameters. As per the study, it is identified that the TCT and BL PV arrays are showing better results under all considered shading conditions compared to other connections. © 2021 IEEE.