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在确定光伏方阵最佳倾角时，应综合考虑方阵面上太阳辐射量的连续性、均匀性和极大性。“夏半年”和“冬半年”周期内入射到倾斜面上的平均日辐射量Ｈ１和Ｈ２相等或在相等之前Ｈ２有极大值，则其对应角度即为最佳倾角。通过改变相应放电深度的简便计算方法，即可得到相应于不同负载缺电率的一系列光伏方阵与蓄电池容量组合，从而确定最佳的方阵和蓄电池容量。
When determining the optimal angle of PV array, the continuity, uniformity and maximalness of solar radiation on the square should be considered. In the “summer half year” and “winter half year” period, the average daily irradiance H1 and H2 incident on the inclined plane are the same or equal to the maximum before H2, the corresponding angle is the best dip angle. By changing the calculation method of the corresponding depth of discharge, a series of combinations of photovoltaic array and battery capacity corresponding to different LVDs can be obtained, so as to determine the optimal squareness and battery capacity.