基于最大功率点跟踪策略的LED太阳能路灯照明系统

The Solar Energy Road Lamp Using High Brightness LED Based on the Maximum Power Point Tracking

在太阳能电池电路模型的基础上,针对传统太阳能路灯系统中防电流倒灌二极管使系统输出功率下降的问题,提出了一种数模混合型最大功率点跟踪(MPPT)策略,并根据该策略和固态光源LED驱动电路的要求,设计了一个高亮度LED太阳能路灯照明系统。实验结果表明,该系统工作稳定可靠,性能优良,可提高太阳能利用率20%左右,具有较高的实用价值。

On the basis of the research for the model of solar batteries＇ circuit,and in views of shortcomings that the diode prevents current backflow which makes the output power of the system decrease in the solar energy road lamp system,a mixed analog-digital maximum power point tracking（MPPT） strategy is proposed in this paper.And according to the requirements of such strategy and solidstate light source LED driver circuit,a high brightness LED solar street lighting system is designed.Exoperiments show that such system has a stable,reliable and excellent performance.Moreover,the utilization of solar energy is increased about 20%.The system has high practical value.