独立光伏照明系统中的能量管理控制

该文研究-种新颖的光伏照明能量管理系统,它包括了太阳能最大功率点跟踪（Maximum power point tracking,MPPT）和蓄电池充电分段控制的能量管理策略.在充电过程中,不同的光照和温度条件下,充电电路能自动调整使太阳能电池始终工作在最大功率输出状态.控制器还根据环境温度和蓄电池端电压选择适当的充电方式,蓄电池将充满时,控制器会自动调整成为过充和浮充方式,从而能有效地延长蓄电池的寿命.配合专门设计的高频电子镇流器,该系统还使用了高压钠灯作为照明光源,有效提高了照明效率.试验结果表明,此独立光伏照明系统具有高效、稳定的特点.

A NOVEL ENERGE MANAGEMENT AND CONTROL FOR STAND-ALONE PHOTOVOLTAIC LIGHTING SYSTEM

This paper proposes a novel stand-alone photovoltaic (PV) lighting system with optimal energy management and control. The system includes maximum power point tracking (MPPT) for PV panels and self-adaptive control over lead-acid storage battery. In charge process, charging controller can automatically adjust itself to obtain the highest possible power from PV panels under various light intensity and temperature. Based on environment temperature and battery terminal voltage, the controller can also adopt proper charge mode, such as overcharge and floating charge, to extend the battery life. The system also can provide functional illumination based on high-pressure sodium (HPS) lamp, which works at very high efficiency with specially designed ballast and ignitor. Experimental results show the high stability and high efficiency of this PV energy management system.