研究目的
To enhance the power quality of a standalone photovoltaic system using Fuzzy Logic Control based MPPT and shunt active power filter for harmonic mitigation and power factor improvement.
研究成果
The proposed system effectively reduces the THD of the source current to below 5%, complying with IEEE-519 standards, and improves the power factor. The FLC based MPPT ensures maximum power extraction from the PV array, while the SAPF compensates for harmonics and reactive power, enhancing the overall power quality of the standalone photovoltaic system.
研究不足
The study is based on simulation results using MATLAB/Simulink, which may not fully capture real-world operational challenges. The effectiveness of the proposed system under varying environmental conditions and load types needs further validation.
1：Experimental Design and Method Selection:
The study employs a Fuzzy Logic Control based Perturbed & Observed (P&O) MPPT algorithm for maximum power extraction from a PV array. A Proportional Integral controller with positive sequence detector phase locked loop (PLL) synchronization is used to generate reference current for a hysteresis band current controlled (HBCC) voltage source inverter (VSI).
2：Sample Selection and Data Sources:
The system is tested with a single-phase photovoltaic system connected to a non-linear load, simulated using MATLAB/Simulink 2015(a).
3：List of Experimental Equipment and Materials:
PV array, boost converter, IGBTs inverter, passive filter components (inductor and capacitor), and a DC link capacitor.
4：Experimental Procedures and Operational Workflow:
The system design includes the PV array integration with a non-linear load, application of FLC based MPPT, and SAPF for harmonic compensation. The operational workflow involves generating switching signals for the VSI based on the reference current derived from the PI controller and PLL synchronization.
5：Data Analysis Methods:
The performance is evaluated based on the reduction in Total Harmonic Distortion (THD) of the source current and improvement in power factor, analyzed through simulation results.
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