研究目的
To investigate the effect of using PI-based MPPT controllers on enhancing the performance of a 400-kW grid-connected PV system.
研究成果
The study concludes that the FOPI controller, optimized using WOA, provides the best performance for MPPT in grid-connected PV systems, nearly eliminating overshoot and improving settling time. The IC-FOPI combination is recommended for optimal power performance.
研究不足
The study focuses on simulation results using MATLAB SIMULINK, which may not fully capture real-world conditions. The performance of the proposed methods under extreme weather conditions or partial shading is not explored.
1：Experimental Design and Method Selection:
The study employs the Whale Optimization Algorithm (WOA) to tune the PI controller parameters for MPPT in a grid-connected PV system. The performance of PI-based IC MPPT is compared with conventional IC and P&O techniques.
2：Sample Selection and Data Sources:
A 400-kW PV array connected to a grid via dc-dc boost and DC-AC converters is used. Data on power output, overshoot, settling time, and rise time are collected under constant and varying irradiance and temperature conditions.
3：List of Experimental Equipment and Materials:
MATLAB SIMULINK for simulation, SunPower SPR-305E-WHT-D PV modules.
4：Experimental Procedures and Operational Workflow:
The system is tested under two patterns of irradiance and temperature. Various modes of PI controller (I, PI, FOPI) are applied, and their performance is evaluated based on power response characteristics.
5：Data Analysis Methods:
Performance indices (IAE, ISE, ITAE, ITSE) are used to evaluate the effectiveness of the MPPT techniques. The best controller gains are determined through WOA optimization.
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