研究目的
Investigating the performance of a single-stage multilevel converter for grid interactive Photovoltaic (PV) system using a Cascaded Two-Level Inverter (CTLI).
研究成果
The CTLI based grid interactive PV system effectively tracks MPP under varying insolation conditions, provides active and reactive power control, and eliminates harmonics for nonlinear loads. The system's multifunctionality increases its overall utilization, making it a viable solution for grid-connected PV applications.
研究不足
The study is based on simulations, and real-world implementation may face challenges such as component tolerances, environmental factors, and grid stability issues.
1：Experimental Design and Method Selection:
The study employs a CTLI for grid interactive PV system, focusing on reducing the number of switches and isolated DC sources compared to conventional MLIs. The control scheme is developed using instantaneous power (p-q) theory.
2：Sample Selection and Data Sources:
The study uses PV arrays connected at the dc-link of each inverter, with parameters specified in Table-I.
3：List of Experimental Equipment and Materials:
PV arrays, CTLI, transformer, grid connection components, and MATLAB/Simulink for simulation.
4：Experimental Procedures and Operational Workflow:
The system is simulated under varying insolation and load conditions to validate MPPT, active and reactive power control, and harmonic elimination.
5：Data Analysis Methods:
Performance is analyzed through MATLAB/Simulink simulations, focusing on MPPT tracking, power balance, and harmonic elimination.
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