Adaptive Switch Matrix for PV Module Connections to Avoid Permanent Cross-Tied Link in PV Array System Under Non-Uniform Irradiations

Rupendra Kumar Pachauri,Mohamad Esmail Hamedani Golshan,Jianbo Bai,Hassan Haes Alhelou

doi:10.1109/access.2021.3068637

Rupendra Kumar Pachauri, Mohamad Esmail Hamedani Golshan + Show 2 more

Open Access

https://doi.org/10.1109/access.2021.3068637

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Abstract

In this paper, the significance of cross-tied link between the solar photovoltaic (PV) modules in an array during partial shading conditions (PSCs) is introduced. In order to conduct a detailed analysis, twenty numbers of 20W PV modules ( 4×5) are arranged in a series-parallel (SP) configuration. The change in the pre-arranged SP configured PV array is implemented using a cross-link matrix switch between parallels based on shadow patterns. The switch matrix based modified PV array configuration is called Adaptive-cross-tied (A-CT) configuration. An embedded system based adaptive switch matrix (ASM) controller is developed to control the cross-linking connections between the PV modules under the PSCs to improve global maximum power. In addition, a performance analysis is carried out and compared all PV modules arranged in conventional SP and A-CT configurations. Moreover, realistic shadow test cases are under consideration to characterize current-voltage (I-V) and power-voltage (P-V) characteristics. The output power of the PV array decreases as well as the P-V curves show multiple power maxima points., such as the local maximum power point (LMPP) and the global maximum power point (GMPP). LMPP and GMPP locations, mismatch loss (ML), enhanced fill factor (FF), decreased power loss (PL) and performance ratio (PR) are indicators of performance during experimental and MATLAB/Simulink studies.

Highlights

In this technological era, electricity plays a key role in the growth of the nation’s economy
Most energy demand still relies on fossil fuels, which face major problems with scarcity, limited storage, pollution and high costs for extract and supply, etc
Under STC, the current generated from integrated all PV modules in an array is assumed In

Summary

Introduction

Electricity plays a key role in the growth of the nation’s economy. Most energy demand still relies on fossil fuels, which face major problems with scarcity, limited storage, pollution and high costs for extract and supply, etc. Users do not need as much high skills to install and use the PV systems in distinguish low power capacities (10W- 500W), and low maintenance costs. In this sense, the PV industries have continuously growing at a rapid pace in manufacturing and installation fields. In 2018, PV systems can carry the worldwide supply of electricity and a hundred of GW power capacity were added. The total power capacity of the deployed PV systems worldwide exceeds 505 GW [3]

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