Advanced Grid Synchronization Scheme Based on Dual eSOGI-FLL for Grid-Feeding Converters

Nguyen, Anh Tan; Lee, Dong-Choon

doi:10.1109/tpel.2022.3140893

Cited by 17 publications

(2 citation statements)

References 33 publications

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“…Therefore, the FFDSOGI-PLL (FF,1) will be compared with advanced three-phase frequency and phase angle estimation systems which were published in the recent and briefly presented in the following. The "enhanced SOGI frequency-locked loop PLL" (eSOGI-FLL-PLL) in [38] provides a DSOGI-related approach where two SOGI structures yield four output signals to apply a PSC. However, instead of the PLL's estimated frequency, an extra FLL was applied to the SOGI tuning and a variable gain improves its transient performance.…”

Section: Comparison With Advanced 3 ∼ Pllmentioning

confidence: 99%

A Three-Phase Frequency-Fixed DSOGI-PLL With Low Computational Effort

Hoepfner

Vick

2023

IEEE Access

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This paper offers a detailed analysis as well as a tuning and discretization approach of the presented frequency-fixed dual second order generalized integrator based phase-locked loop (FFDSOGI-PLL) for three-phase power systems. The method combines different single-and three-phase PLL approaches by ensuring high phase-and frequency tracking properties. The comparison with the standard frequency-variable DSOGI-PLL and three different recently published three-phase frequency and phaseangle estimation systems shows, that this approach gives a fast and stable phase and frequency detection of the grid voltage with very low computational burden. The results are applicable to, for instance, photovoltaic or frequency converters or active power filters.

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Section: Comparison With Advanced 3 ∼ Pllmentioning

confidence: 99%

A Three-Phase Frequency-Fixed DSOGI-PLL With Low Computational Effort

Hoepfner

Vick

2023

IEEE Access

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“…The SOGI/ANF-FLL structures lack rejection of DC offsets, and the inclusion of additional sections for sequence computation introduces duplication. The utilization of dual SOGI (DSOGI)-FLL has the potential to remove the necessity for additional sections in sequence computation [15]. Nevertheless, the effectiveness of the system declines as a result of its susceptibility to subharmonics.…”

Section: Introductionmentioning

confidence: 99%

Alleviation of Power Quality Issues in MVF-DEANF-PLL Based Solar PV Systems under Polluted Grid Conditions

Mohan,

Siddhan,

Chinnadurai

2023

Sustainability

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Solar energy is a sustainable and environmentally safe power source due to its widespread availability and cleanliness. Nowadays, the grid-integrated solar photovoltaic system (SPVS) has to work with a polluted grid, an imbalanced load, and changing solar irradiation. When the grid is polluted, it is also crucial to enhance power quality (PQ) at a common coupling point (CCP) while supplying significantly distorted and unreliable loads. For effective synchronization and the production of unit templates, it is necessary to retrieve positive sequence components (PSCs) from distorted/imbalanced grid voltages. In this study, a control algorithm for a grid-integrated SPVS is developed using a multi-variable filter dual-enhanced adaptive notch filter phase-locked loop (MVF-DEANF-PLL) which offers seamless grid synchronization and PQ issue alleviation. In a polluted grid environment, the proposed control approach aids in the reduction in current/voltage harmonics, DC offset, unity power factor (UPF) operation, and rapid estimation of sequence components. Even in unbalanced grid conditions, the proposed control approach efficiently extracts PSCs of both unbalanced load current and polluted CCP grid voltages. These PSCs are utilized to generate unit templates and reference source currents. By using a flexible step-size incremental conductance (FSSINC) maximum power point tracking (MPPT) technique, the highest available power of SPVS is gathered. MATLAB/Simulink is utilized for modelling a 7.22 kW SPV system, and results from simulations which depict that the proposed algorithm efficiently resolves PQ concerns in distribution networks with a polluted grid. Test observations of a 1 kW laboratory-developed SPVS prototype were recorded in compliance with the IEEE-519 standard. The suggested control technique complies with the aforementioned standards by providing a sinusoidal balanced source current that has a THD of 2.5%. Comparisons between the proposed control’s performance and that of a conventional SRF-PLL-based control technique were also performed.

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