基于混沌理论的风电功率超短期多步预测的误差分析

Analysis of ultra-short-term prediction error of wind power based on chaos theory

风电功率对电力系统的安全运行、合理调度等方面有不可忽视的影响。掌握风电功率预测误差的分布特性,对风资源的大规模开发利用具有重要意义。利用两种混沌预测方法进行风电功率超短期的预测。并且以东北某风电场的实测风电功率数据为例,分析了超短期风电功率预测误差的概率分布、预测误差与超前预测步数之间的关系、预测误差与风电场出力情况之间的关系以及预测误差与装机容量之间的关系。该研究为揭示风电功率超短期多步预测的误差构成及修正奠定了理论基础。

Wind power has a big influence on the safe operation and rational management of electric power system. It is useful to grasp the distribution characteristics of wind power prediction error for the large-scale development and utilization of wind energy. Two chaos ultra-short-term forecasting methods are used to predict wind power. The wind power data of a northeast wind farm is taken as an example to analyze the probability distribution of single-step prediction error of wind power, the relationship between the wind power prediction error and the prediction step number, the relationship between the wind power prediction error and the wind farm output power, and the relationship between the wind power prediction error and the installed capacity. It lays the theoretical foundation for the analysis of the composition and correction of the wind power prediction error.