Flyback Photovoltaic Micro-Inverter with a Low Cost and Simple Digital-Analog Control Scheme

Salam J. Yaqoob, Adel Obed, Rana Zubo, Yasir I. A. Al-Yasir, Hussein Fadhel, Geev Mokryani and Raed A. Abd-Alhameed
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Salam J. Yaqoob: Department of Electrical Power Engineering, Electrical Engineering Technical College, Middle Technical University, Baghdad 10001, Iraq
Adel Obed: Department of Electrical Power Engineering, Electrical Engineering Technical College, Middle Technical University, Baghdad 10001, Iraq
Rana Zubo: Electronic and Control Engineering Department, Technical Engineering College Kirkuk, Northern Technical University, Kirkuk 00964, Iraq
Yasir I. A. Al-Yasir: Biomedical and Electronics Engineering, Faculty of Engineering and Informatics, University of Bradford, Bradford BD7 1DP, UK
Hussein Fadhel: Electronic and Control Engineering Department, Technical Engineering College Kirkuk, Northern Technical University, Kirkuk 00964, Iraq
Geev Mokryani: Biomedical and Electronics Engineering, Faculty of Engineering and Informatics, University of Bradford, Bradford BD7 1DP, UK
Raed A. Abd-Alhameed: Biomedical and Electronics Engineering, Faculty of Engineering and Informatics, University of Bradford, Bradford BD7 1DP, UK

Energies, 2021, vol. 14, issue 14, 1-16

Abstract: The single-stage flyback Photovoltaic (PV) micro-inverter is considered as a simple and small in size topology but requires expensive digital microcontrollers such as Field-Programmable Gate Array (FPGA) or Digital Signal Processor (DSP) to increase the system efficiency, this would increase the cost of the overall system. To solve this problem, based on a single-stage flyback structure, this paper proposed a low cost and simple analog-digital control scheme. This control scheme is implemented using a low cost ATMega microcontroller built in the Arduino Uno board and some analog operational amplifiers. First, the single-stage flyback topology is analyzed theoretically and then the design consideration is obtained. Second, a 120 W prototype was developed in the laboratory to validate the proposed control. To prove the effectiveness of this control, we compared the cost price, overall system efficiency, and THD values of the proposed results with the results obtained by the literature. So, a low system component, single power stage, cheap control scheme, and decent efficiency are achieved by the proposed system. Finally, the experimental results present that the proposed system has a maximum efficiency of 91%, with good values of the total harmonic distortion (THD) compared to the results of other authors.

Keywords: isolated single-stage inverter; flyback photovoltaic micro-inverter; simple control strategy; flyback transformer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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