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Study of multi-objective photovoltaic grid connected system using SOGI-FLL and NL-SOGI-FLL-APF based DQ hysteresis method

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Abstract

This study reports on the results of an experimental investigation into a multi-objective nonlinear oscillator-based frequency-locked loop with an advanced pre-filter in a three-phase photovoltaic grid interface employing direct and quadrature hysteresis control for a distribution system. A reference voltage generation approach is also used to obtain the most power out of the solar array. In various case studies, including reactive and real power balance between load, grid, and photovoltaic systems under uncertain and varying solar power conditions, the proposed nonlinear second-order generalized integrator-based frequency-locked loop with an advanced filter performance is compared to a second-order generalized integrator-based frequency-locked loop. The proposed control enabled more stable operation and appropriate synchronization when grid voltages were distorted by the combined action of dc offset and harmonics. According to experiments, the suggested control achieves grid synchronization more correctly under abrupt changes in grid conditions and disturbances. The findings of an experimental laboratory prototype are confirmed using power quality indices for harmonic distortion assessment of source currents, as defined by the IEEE-519 guidelines.

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The data generated during and/or analyzed during the current study are available from the corresponding author upon reasonable request.

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Authors and Affiliations

  1. Electrical Engineering Department, Government Engineering College, Bharuch, Gujarat, 392001, India

    Prashant K. Shah & Ashutosh K. Giri

  2. SardarVallabhbhai Institute of Technology, GTU, Vasad, Gujarat, 388306, India

    Chetan D. Kotwal

  3. Electronics and Communication Engineering Department, Indian Institute of Information Technology, Design & Manufacturing Kancheepuram, Chennai, Tamil Nadu, 600127, India

    B. Chitti Babu

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  1. Prashant K. Shah
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  2. Chetan D. Kotwal
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  3. Ashutosh K. Giri
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  4. B. Chitti Babu
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Contributions

PKS (Corresponding Author), CDK, AKG, BCB: All Authors discussed the results and commented on the manuscript. PKS contributed to the design and implementation of the research. CDK, AKG, and BCB contributed to the analysis of results and the manuscript’s writing.

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Correspondence to Prashant K. Shah.

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Shah, P.K., Kotwal, C.D., Giri, A.K. et al. Study of multi-objective photovoltaic grid connected system using SOGI-FLL and NL-SOGI-FLL-APF based DQ hysteresis method. Electr Eng 105, 2735–2749 (2023). https://doi.org/10.1007/s00202-023-01817-3

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  • DOI: https://doi.org/10.1007/s00202-023-01817-3

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