研究目的
To investigate the control of a single-phase solar photovoltaic supply system using a modified multilayer fifth order generalized integrator (MLFOGI) and fuzzy logic control (FLC) based maximum power point tracking (MPPT) algorithms under various grid disturbances.
研究成果
The modified MLFOGI controller and FLC based MPPT algorithm effectively manage grid synchronization and maximum power extraction under various grid disturbances. The system demonstrates feasibility with THDs of grid current within acceptable limits as per IEEE-519 standards.
研究不足
The study is based on simulation results using MATLAB/Simulink, and real-world implementation may face challenges not accounted for in the simulation. The system's performance under extreme or unforeseen grid conditions beyond the tested scenarios is not explored.
1：Experimental Design and Method Selection:
The study employs a modified MLFOGI for grid synchronization and FLC for MPPT in a two-stage grid-tied SPV system. The methodology includes the design of MLFOGI and FLC algorithms for extracting maximum power and synchronizing with the grid under disturbances.
2：Sample Selection and Data Sources:
A 641W solar array is considered, with parameters such as open circuit voltage, mppt voltage, short circuit current, and mppt current specified.
3：List of Experimental Equipment and Materials:
Includes SPV array, boost converter, single-phase H-bridge VSI, interfacing inductor, R-C ripple filter, and single-phase grid. Specific parameters like switching frequency, inductor value, dc link capacitor, and voltage are detailed.
4：Experimental Procedures and Operational Workflow:
The system is modeled in MATLAB 2018a with Simulink and Sim power System toolboxes. Performance is evaluated under various solar irradiation profiles and grid disturbances.
5：Data Analysis Methods:
The performance is analyzed based on solar irradiation, PV voltage, PV current, PV power, dc link voltage, grid voltage, grid current, grid injected power, fundamental component of PCC voltage, and unit template.
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