说明：  实现光伏预测，通过当天的光伏出力和天气指数加上预测日的天气指数预测明天的光伏出力，基于BP神经网络对光伏出力进行预测
(Realization of photovoltaic forecast photovoltaic output through the day and the weather forecast daily index plus weather forecast for tomorrow s PV output index, BP neural network to predict based on the realization of photovoltaic PV output forecast photovoltaic output through the day and the weather forecast daily index plus the weather forecast for tomorrow s PV output index, BP neural network to predict the output of the PV)