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IJEETC 2024 Vol.13(3): 214-223
doi: 10.18178/ijeetc.13.3.214-223

A Transformerless Photovoltaic System Employing a Cubic Cell Boost Converter for Low Voltage Application

Anjana Saikia and Santanu Sharma*
Department of Electronics and Communication Engineering, Tezpur University, Tezpur, India
Email: anjana.saikia113@gmail.com (A.S.), santanu.sharma@gmail.com (S.S.)
*Corresponding author

Manuscript received September 15, 2023; revised November 20, 2023; accepted December 15, 2023.

Abstract—A photovoltaic (PV) system is commonly used to satisfy the power demand of the utility. This paper investigates the utilization of a high voltage gain Cubic Cell Boost Converter (CCBC) in a transformerless photovoltaic (PV) system for low voltage applications. The proposed system is a combination of a CCBC and a three-phase inverter creating a two-stage three-phase PV system. The CCBC is linked with the low-scale PV sources to step up its input DC voltage and maintain a constant DC bus voltage by employing the Perturb and Observe (P&O) Maximum Power Point Tracking (MPPT) control algorithm. The DC bus is further connected to an LCL filter based three-phase inverter using a synchronous reference frame (dq) control scheme to power the three-phase utility. The proposed combination is validated by simulating in MATLAB/ SIMULINK environment for a 5.5 kW PV source and achieved an efficiency of 91% with 1.91% of inverter Total Harmonic Distortion (THD) at unity power factor. In the proposed system, CCBC with P&O MPPT control provides a high step-up DC bus voltage with less input current ripple and output voltage ripple and maintains a constant DC bus under variable solar irradiance. This work does not account for the common leakage current that is often produced in a transformerless PV system.

Index Termsdq control, inverter THD, Perturb and Observe (P&O), photovoltaic, ripple, transformerless system

Cite: Anjana Saikia, and Santanu Sharma, "A Transformerless Photovoltaic System Employing a Cubic Cell Boost Converter for Low Voltage Application," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 13, No. 3, pp. 214-223, 2024. doi: 10.18178/ijeetc.13.3.214-223

Copyright © 2024 by the authors. This is an open access article distributed under the Creative Commons Attribution License (CC BY-NC-ND 4.0), which permits use, distribution and reproduction in any medium, provided that the article is properly cited, the use is non-commercial and no modifications or adaptations are made.