研究目的
To present a modified P&O-MPPT technique based on Pythagorean Theorem and CV-MPPT method to solve the problems of conventional P&O algorithm, including low converging time, high oscillation around the maximum power point, and drift problem associated with changing irradiance rapidly.
研究成果
The modified P&O-MPPT technique based on Pythagorean Theorem and CV-MPPT method effectively solves the problems of conventional P&O algorithm, including quick tracking of the maximum power point during fast changing irradiance, reduction of oscillation under steady-state conditions, and avoidance of the drift problem. The simulation results demonstrate higher output power compared with the conventional P&O-MPPT.
研究不足
The study is based on simulation results using MATLAB-SIMULINK, and real-world application may present additional challenges not accounted for in the simulation. The effectiveness of the modified P&O-MPPT technique under varying environmental conditions beyond the tested scenarios is not explored.
1：Experimental Design and Method Selection:
The study involves the development of a modified P&O-MPPT technique based on Pythagorean theorem and CV-MPPT. The conventional and modified P&O methods are simulated using MATLAB-SIMULINK.
2：Sample Selection and Data Sources:
The simulation uses a stand-alone PV system model with parameters including a PV array, DC–DC boost converter with MPPT controller, and load. The PV array parameters include 315 V open-circuit voltage and 395 A short-circuit current.
3：List of Experimental Equipment and Materials:
MATLAB-SIMULINK software for simulation.
4：Experimental Procedures and Operational Workflow:
The simulations are configured under the same parameters for both conventional and modified P&O-MPPTs, with the updating period time of Vref every 1ms. The fixed step size of traditional PO-MPPT is 0.5 V.
5：5 V.
Data Analysis Methods:
5. Data Analysis Methods: The performance of the modified P&O-MPPT method is assessed based on tracking speed, oscillation reduction around the MPP, and avoidance of the drift problem under rapidly changing irradiance conditions.
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