研究目的
Investigating the seamless switching control strategy for micro-grid integrating photovoltaic and energy storage (MIPES) to improve the power quality of distribution network and the reliability of load consumption.
研究成果
The paper concludes that the proposed seamless switching control strategy for MIPES effectively stabilizes the DC bus voltage within a certain range, meets the requirements for seamless switching, and ensures the reliability of local load power supply. The forced switching control strategy of SCR reduces switching time and supports seamless switching control. The strategy realizes 'friendly' access of MIPES to power grid, avoiding impact on the grid during switching process.
研究不足
The study focuses on software control strategy and hardware-software coordination control, with less emphasis on hardware control strategy. The proposed SCR forced shutdown strategy is realized by software control without adding extra circuit, which may limit its applicability in scenarios requiring hardware modifications.
1：Experimental Design and Method Selection:
The study analyzes the boundary conditions for seamless switching of MIPES and the output characteristics of photovoltaic cells. It employs a control strategy for SCR switch forced shutdown to ensure load security during mode switching.
2：Sample Selection and Data Sources:
The output characteristics of photovoltaic array are studied by experiment, with data collected every 30 minutes from 8:00 a.m. to 5:00 p.m.
3：List of Experimental Equipment and Materials:
Includes photovoltaic cells, energy storage systems, SCR switches, and LCL filters.
4：Experimental Procedures and Operational Workflow:
The study involves simulating the switching process between grid-connected and islanded modes, applying the proposed SCR forced shutdown strategy, and analyzing the impact on load voltage and grid-connected current.
5：Data Analysis Methods:
The study uses simulation to verify the effectiveness of the proposed control strategy, analyzing waveforms of local load voltage and grid-connected current.
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