基于MPPT的太阳能智能充电控制器

针对离网光伏发电系统中光伏电池利用率不高和蓄电池极易因充电不当而损坏的问题，分析了光伏电池的输出特性和蓄电池的充放电特性，结合最大功率点跟踪（MPPT）技术和同步整流技术，设计了一个基于同步BUCK电路的太阳能充电控制器并搭建了试验样机。通过运用带有温度补偿的并列三环PID控制方法对充电全过程进行了控制以实现蓄电池在恒流、恒压、MPPT等不同充电方式之间的智能切换。研究结果表明，该控制器在充分利用太阳能的基础上照顾了蓄电池本身的充电特性，避免了蓄电池意外受损，将充电效率提升到了96％以上，最终达到了优化能量管理的目的。

Photovoltaic intelligent charging controller based on MPPT

Aiming at solving problems of underutilization of photovohaic panels and damage of batteries caused by misuse in off-network pho- tovoltaic power generation systems, the photovoltaic panel output characteristics and battery charging and discharging characteristics were ana- lyzed. A photovohaic charging controller built on synchronous BUCK circuit was designed integrated with the most power point tracking （MPPT） technology and synchronous rectification technology, and an experimental prototype was set up. A paratactic three-loop PID control method with temperature compensation was applied to control the overall process of charging so as to realize intelligent switches between dif- ferent charging ways such as constant current charging, constant voltage charging, MPPT charging and so on. The results indicate that, the controller uses the solar energy to the most while following the battery＇s charging characteristics, by which the battery＇s accidental damages are avoided, and the charging efficiency is improved up to 96% and the energy management is optimized eventually.