基于MCU的太阳能最大功率跟踪系统设计

System design of solar maximum power point tracking based on MCU

为了提高太阳能电池板的输出功率,以Freescale Kinetis MK60DN512ZVLQ10(内核ARM Cortex-M4)单片机为核心控制器,设计了一套太阳能最大功率跟踪系统。通过九轴姿态传感器(L3G4200D+ADXL345+HMC5883L)测量到电池板的旋转姿态,利用卡尔曼滤波融合算法估计光敏传感器和太阳轨迹法计算获得的方位角和高度信息,通过双轴云台驱动电池板,使电池板工作于最大功率点附近。利用VB软件编写上位机软件,实现与单片机之间无线通信功能,完成系统状态监控和数据记录功能。实验结果表明,该设计能有效提高太阳能电池板的输出功率,具有一定的实用价值。

In order to improve the output power of the solar battery board, the MPPT system was de signed using Freescale Kinetis MK60DN512ZVLQ10 （kernel ARM CortexM4） as controller. The nine axis attitude sensor （L3G4200D ＋ ADXL345 ＋ HMC5883L） was used in measure rotation attitude, and Kalman fu sion algorithms was used to estimation azimuth and elevation according to results of photosensitive sensor and calculation. PV cell was driven by 2DOF pantilt, which makes PV cell work around the maximum power point. PC can communicate with MCU through wireless module, and can monitor and record PV cell. Experi ments show that the maximum power tracking algorithm can effectively increase the output power of the PV cell, also it has some practical value.