具有TMPPT功能的太阳能光伏充电系统研究

针对太阳能电池组件输出特性曲线的非线性特点以及传统的直接与蓄电池并联充电方式的缺点,本文进行了太阳能电池组件的最大功率点跟踪控制研究,并提出了采用变步长电压扰动观察的跟踪控制策略.由于充电系统中的蓄电池组为易损设备,因此,本文结合蓄电池的充放电特性曲线以及太阳能电源的输出特性,对蓄电池组进行了优化管理研究.在此基础上,设计了基于单片机JK3和脉宽调制芯片TL494的太阳能光伏充电系统,采用电压电流双闭环控制,有效改善了系统的跟踪效果.最后,在太阳能电池阵列模拟器上进行了太阳能电池组件的最大功率点跟踪的实验验证.实验结果证明上述控制策略具有良好的跟踪效果,有效提高了系统充电效率.

Research on Solar Photovoltaic Charging System with TMPPT Function

According to the nonlinear output characteristic of solar cell module and the drawback of traditional direct parallel connection method,TMPPT control strategy of solar cell module is studied and a tracking control strategy is presented,which adopts variable voltage step disturbance and observation.As the batteries are the easy to be damaged devices in the charging system,the study on optimal management of the batteries is carried out,which considers the charging and discharging curve of the batteries and th...