电力电子在太阳能路灯照明系统中的应用

Implementation of Power Electronics Technique in a Stand-alone Photovoltaic Lighting System with High Pressure Sodium Lamp

将高压气体放电灯(高压钠灯)用于光伏照明系统,再合理选择系统的各部分容量使之配合,即可在控制成本的前提下组成高效光伏照明系统。为了配合高压气体放电灯的稳定工作,研制了一个直流升压电路和一个高频逆变电路。配以镇流、启辉电路,实现了250W高压气体放电灯在高频电源下稳定工作,为照明提供了稳定、高转换效率的电光源,从而满足道路交通照明的要求。在此光伏照明系统中,还实现了太阳能最大功率点跟踪(MaximumPower Point Tracking,MPPT)技术。这样在充电过程中,即使在不同的光照和温度条件下,充电电路也能自动调整,使太阳能电池始终工作在最大功率输出状态。

This paper presents a high-efficiency stand-alone photovoltaic (PV) lighting system which can provide functional illumination based on high-pressure sodium (HPS) lamp. HPS lamp in the system works at very high efficiency with specially designed ballast and ignitor. In order to provide a steady-state operating environment for the HPS lamp, a DC-DC converter and a DC-AC inverter are also implemented. A high frequency in this system also remarkably reduces the size and the operating noise of the ballast. Maxim...