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High-power closed-loop smpc-based photovoltaic system characterization under varying ambient conditions

Bharadwaj, P and John, V (2021) High-power closed-loop smpc-based photovoltaic system characterization under varying ambient conditions. In: Energies, 14 (17).

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Official URL: https://doi.org/10.3390/en14175296


Photovoltaic energy generation potential can be tapped with maximum efficacy by charac-terizing the source behaviour. Characterization refers to the systematic terminal measurement-based PV modeling which can further facilitate output prediction and fault detection. Most of the existing PV characterization methods fail for high-power PV array due to increased thermal losses in electronic components. Here, we propose a switched-mode power converter-based PV characterization setup which is designed with input filter to limit switching ripple entering into PV array under test, thereby enhancing system life and efficiency. The high resonant frequency input filter ensures its compactness with high-speed characterization capability. To further enhance the system perfor-mance, a closed-loop current control of the system is designed for high bandwidth and stable phase margins. Variation of the controller parameters under varying ambient conditions of 200�1000 W/m2 irradiation and 25�70� C temperature is documented and an adaptive PI controller is proposed. Experimental and simulation results validate the high performance of the closed loop operation of the PV characterization at 1.2 kW range power level in real-time field conditions. Compared to the open loop operation, the closed-loop operation eliminates the waveform ringing by 100 during characterization. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Item Type: Journal Article
Publication: Energies
Publisher: MDPI
Additional Information: The copyright for this article belongs to Authors
Keywords: Fault detection; Natural frequencies; Photovoltaic effects, Adaptive pi controllers; Characterization methods; Closed-loop current controls; Closed-loop operation; Controller parameter; Electronic component; Switched mode power converter; Terminal measurements, Photovoltaic cells
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 02 Dec 2021 12:56
Last Modified: 02 Dec 2021 12:56
URI: http://eprints.iisc.ac.in/id/eprint/70073

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