研究目的
Investigating the energy efficiency and control mechanisms of solar-powered LED street lighting systems, including intensity control based on traffic hours and the development of a hybrid model for continuous operation under any weather conditions.
研究成果
The designed solar LED street lighting systems with intensity control and hybrid operation are efficient and feasible. Intensity control reduces energy consumption and extends battery backup duration. The hybrid model ensures continuous operation under any weather conditions by integrating grid power.
研究不足
The study is based on simulation results, which may not fully capture real-world conditions. The system's performance is dependent on solar irradiance, and the hybrid model requires grid connection for continuous operation under unfavorable weather conditions.
1：Experimental Design and Method Selection:
The study involves designing a solar-powered LED street lighting system with intensity control and a hybrid model for continuous operation. The methodology includes the use of SPV array, MPPT, dc-dc converters, and battery storage, with simulation studies performed in Matlab-Simulink environment.
2：Sample Selection and Data Sources:
The system components include a 200W peak SPV array, a Li-ion battery, and a 10x5 array of LEDs. Data on solar irradiance, battery state of charge (SOC), and LED performance are collected.
3：List of Experimental Equipment and Materials:
SPV array (200W peak), Li-ion battery (24V), LED array (10x5, 1W each), buck and boost converters, MPPT controller (Incremental conductance method), and Matlab-Simulink software for simulation.
4：Experimental Procedures and Operational Workflow:
The system charges the battery during the day using solar power and discharges it at night to power the LEDs. Intensity control is implemented by adjusting the duty cycle of the boost converter based on traffic hours.
5：Data Analysis Methods:
Performance is analyzed based on power, voltage, and current graphs for different solar irradiances, battery SOC, and LED output under varying intensities.
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