【摘要】 目前光伏发电的一个应用瓶颈是发电效率低,制约了光伏发电的应用和发展。设计自动跟踪的光伏发电系统是提高光伏发电效率的一种重要途径。自动跟踪系统有利于使太阳光线尽可能地垂直入射于太阳电池板,使电池板最大限度地获得太阳辐射能量。从工程应用实际出发,采用ARM7处理器为主控芯片,设计了光伏发电自动跟踪控制系统及嵌入式光伏MPPT控制方案。该系统由太阳跟踪器和二维平面支架控制器组成,通过GPS提取相应数据,计算出太阳的高度及方位角度。而后通过PWM调速方式驱动电机,对光伏发电二维平面支架进行适当调整,从而实现对太阳的自动跟踪。实验结果说明该控制器能有效地提高太阳能的利用率。更多还原

【Abstract】 An application bottleneck of photovoltaic power generation is low power efficiency. The application and development of photovoltaic power generation is restricted. Design of automatic tracking of photovoltaic power generation system is an important way to improve the efficiency of photovoltaic power generation. Automatic tracking system is helpful to make the sun rays as much as possible to the vertical incident in solar panels, making the panels maximize the solar radiation energy. According to practical engineering application, ARM7 processor as main control chip was adopted; photovoltaic automatic tracking control system and embedded PV MPPT control scheme were designed. The system consisted of solar tracker and two-dimensional plane bracket of controller, the altitude and azimuth angle of the sun was calculated through extracting the GPS data. The motor was driven by PWM speed regulating to adjust photovoltaic two-dimensional plane bracket. Then the automatic tracking of the sun was realized.The experimental results show that the utilization rate of solar energy could be effectively improved.更多还原