研究目的
To harvest the optimum power from solar panels using different MPPT techniques for low power applications under non-uniform irradiance conditions, specifically addressing the reduction in power output due to partial shading by introducing a new differential power converter with INC control algorithm.
研究成果
The simulation results demonstrate that the INC and fuzzy logic MPPT techniques provide better tracking of the maximum power point with high convergence speed and reduced oscillations compared to other methods. The proposed differential power converter with INC algorithm effectively mitigates the partial shading problem by handling current mismatches in series-connected PV modules, leading to improved power output and efficiency under non-uniform irradiance conditions. Future work could involve physical implementation and testing under varied environmental scenarios.
研究不足
The study is based on simulations using MATLAB/Simulink, which may not fully capture real-world conditions and complexities. Physical implementation and validation are not addressed, and the focus is on low power applications, potentially limiting scalability to larger systems. The differential power processing approach is evaluated only with the INC algorithm, and its effectiveness with other techniques or under extreme conditions is not explored.
1：Experimental Design and Method Selection:
The study involves simulating a photovoltaic system using MATLAB/Simulink to evaluate various MPPT techniques (P&O, INC, constant voltage, constant current, fuzzy logic) and a proposed differential power processing approach with INC algorithm under different irradiance conditions, including partial shading. Theoretical models include the PV cell equivalent circuit and buck converter characteristics.
2：Sample Selection and Data Sources:
A PV module with specifications of 60W maximum power, 3.74A short-circuit current, and 21.0V open-circuit voltage is used for simulation under standard temperature and irradiance conditions, with variations to model non-uniform irradiance and partial shading.
3：74A short-circuit current, and 0V open-circuit voltage is used for simulation under standard temperature and irradiance conditions, with variations to model non-uniform irradiance and partial shading.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: MATLAB/Simulink software for simulation; no specific physical equipment is mentioned, as the study is simulation-based.
4：Experimental Procedures and Operational Workflow:
Simulations are conducted to measure output power, voltage, and current of the PV array under varying irradiances. The differential power converter is implemented to handle current mismatch in series-connected PV modules under partial shading conditions, with comparisons made between techniques based on settling time and power efficiency.
5：Data Analysis Methods:
Results are analyzed through simulation outputs, including power, voltage, and current graphs, and tabulated data on maximum power obtained and settling times for different MPPT techniques.
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