研究目的
Investigating the implementation of a standalone micro grid for rural electrification using multilevel converters powered by PV solar energy, focusing on robustness, reliability, low maintenance, and affordable costs.
研究成果
The developed electrical network demonstrates good behavior across a large range of load power, with perfectly sinusoidal waveforms in the network. The association of the two multi-level converters operates well, with the Boost converter serving as an interface between PV panels and battery banks. The system shows potential for battery charging under high irradiance and low load power conditions, though this aspect requires further control to prevent battery damage.
研究不足
The study does not address the control of battery charging to prevent destruction, which is noted as an area for future work.
1：Experimental Design and Method Selection:
The study employs two five-level converters in a micro grid network powered by PV solar energy. The first converter is a five-level Boost structure operating with a low switching frequency, linking PV panels and battery bank. The second is a Five-level Load Point Clamped (LPC) Inverter modified to increase voltage withstand of each power semiconductor.
2：Sample Selection and Data Sources:
The simulation models of PV panels and battery are taken from MATLAB's Components Library.
3：List of Experimental Equipment and Materials:
Includes PV solar panels, battery banks, two 5-levels converters, two passive low-pass filters, and PI controllers.
4：Experimental Procedures and Operational Workflow:
The Boost converter regulates voltages via the duty cycle of the control of the gates triggers of the transistors. The LPC Inverter operates in full-wave mode to reduce switching losses without degrading THD of the output voltage.
5：Data Analysis Methods:
The dimensioning of the filter located before the electrical network supplying the users is treated, and the results and performances are analyzed according to two supply modes: by battery and by the PV panels associated with battery banks.
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