【摘要】 为了提高太阳方位跟踪精度,降低光伏发电系统的成本,利用光伏电池旋转产生的短路电流是交变电流的这一特点,通过离散傅里叶变换(DFT)求解交变电流的初相位,计算太阳的高度角和方位角,实现了对太阳方位的自动跟踪。并依此方法设计出了一套基于数字信号处理器(DSP)的新型太阳方位跟踪系统。实验结果表明,该系统能实现太阳光大范围内检测,并迅速跟踪,可避免多块光敏元件的不一致性所带来的问题,有效地提高了跟踪系统的精确性,可望在太阳能光伏发电工程中得到应用。更多还原

【Abstract】 Aiming at improving the accuracy of solar azimuth tracking system and reducing the cost of photovoltaic power generation system,considering that short current of photovoltaic cell is alternated with time by cell’s rotation,a new method with minor components and large range measurement was put forward in which angles were obtained by calculating the phase of short current with discrete Fourier transform(DFT).A new solar azimuth tracking system based on digital signal processor(DSP) was designed.The test result shows that the azimuth of sun can be quickly obtained,and the accuracy of system can be improved,because the problems caused by the inconsistency of photovoltaic cells can be avoided by using the new system based on this method.更多还原