国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

Power load forecasting is an important basis for power system scheduling and power production planning. The power load time series has obvious periodicity characteristics. Traditional power load forecasting mainly focuses on forecasting methods, but ignores the analysis of periodic characteristics of power load data, which affects the accuracy of prediction. According to the periodic characteristics of power load time series, a grey system model based on periodic truncation is proposed to predict the power load. The model uses periodic truncation to reflect the periodic characteristics of load data and improves the prediction accuracy. Simulation uses EUNITE Network public load data to evaluate the performance of the algorithm, and compare with some mainstream power load forecasting algorithms:BP neural network, extreme learning machine, auto regression model and traditional grey system model. The simulation results show that the normalized mean square error and absolute mean error are minimum for the proposed method. The periodic truncated grey system provides a new effective method for power system load forecasting.