A Novel VFVDC Optimized Full Bridge Inverter Control Strategy for Independent Solar Power Systems

Hwa-Dong Liu; Chang-Hua Lin; Shiue-Der Lu; Javed Ahmad

doi:10.1109/ACCESS.2022.3169516

IEEE Access (Jan 2022)

A Novel VFVDC Optimized Full Bridge Inverter Control Strategy for Independent Solar Power Systems

Hwa-Dong Liu,
Chang-Hua Lin,
Shiue-Der Lu,
Javed Ahmad

Affiliations

Hwa-Dong Liu: ORCiD; Undergraduate Program of Vehicle and Energy Engineering, National Taiwan Normal University, Taipei, Taiwan
Chang-Hua Lin: Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
Shiue-Der Lu: ORCiD; Department of Electrical Engineering, National Chin-Yi University of Technology, Taichung, Taiwan
Javed Ahmad: ORCiD; Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan

DOI: https://doi.org/10.1109/ACCESS.2022.3169516
Journal volume & issue: Vol. 10
pp. 44231 – 44247

Abstract

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This research explored the independent solar power system (ISPS), including the maximum power point tracking (MPPT) technology and the DC (direct current) to AC (alternating current) full-bridge inverter (FBI) control technology. This study combined the perturb and observe (P&O) algorithm based on the output voltage control strategy and the proposed optimized FBI control strategy to the ISPS. The proposed variable frequency and variable duty cycle (VFVDC) optimized FBI control strategy had adjustable frequency and duty cycle. The proposed VFVDC control strategy was compared with the sinusoidal pulse width modulation (SPWM). When the output of FBI was at a low voltage level, the operating frequency was 10 kHz. Conversely, when the FBI gave a high voltage level output, the operating frequency was 1 kHz. This control improved the switching loss of 4 power MOSFETs in the FBI and thus improved the performance with a low harmonic amount. To further verify the explored system, this study used MATLAB to compare the proposed control strategy and SPWM control method. The simulation results verified that the proposed control strategy total harmonic distortion (THD) = 1.02% was better than the SPWM control method THD = 3.23%, then the low pass filter (LPF) volume was reduced. Finally, the actual ISPS was used for actual measurement and verification. The proposed control strategy had a low harmonic level, can operate stably and effectively, and thus be used for the actual fulfillment of electricity needs.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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