研究目的
To improve the tracking effect of the output voltage by proposing a finite control set multistep model predictive voltage control (FCS-MMPVC) with delay compensation method for PV systems.
研究成果
The proposed FCS-MMPVC with delay compensation method effectively improves the tracking effect of the output voltage, reduces the difference between the output voltage and the reference under unbalanced and non-linear loads, and enhances the output voltage quality of the inverter. The method demonstrates good stability and reliability, with potential for further optimization in MPPT technique and control algorithm stability.
研究不足
The accuracy of the proposed multi-step model predictive voltage control with delay compensation is related to the filter parameters. Variations in LC filter parameters can affect the control effect, requiring adjustments to match the filter parameters to avoid unstable output.
1：Experimental Design and Method Selection:
The study involves the design of a multi-step model predictive voltage control method with delay compensation for a three-level three-phase voltage source PV inverter. The methodology includes evaluating twenty-seven voltage vectors online based on a predictive model to obtain optimal and suboptimal switching states.
2：Sample Selection and Data Sources:
The study uses a three-level three-phase voltage source inverter as the main circuit for validation. The parameters include DC link voltage, filter inductance, filter resistance, and filter capacitor.
3：List of Experimental Equipment and Materials:
The main equipment includes a three-level NPC inverter, DC link capacitors, filter inductance, filter resistance, and filter capacitor.
4：Experimental Procedures and Operational Workflow:
The procedure involves measuring load voltage, load current, output current, and DC link capacitor voltages, applying switching states, estimating load voltage, predicting load voltage for the next sampling instant, and selecting optimal switching states with delay compensation.
5：Data Analysis Methods:
The analysis includes comparing the output voltage THD, root mean square voltage reference tracking error, and the amplitude of fundamental voltage between traditional and proposed methods.
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