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基于CGM-IPSO-LSSVM的短期风电功率预测

来源:电工电气发布时间:2023-07-01 09:01 浏览次数:199

基于CGM-IPSO-LSSVM的短期风电功率预测

康义1,罗利伟2
(1 华北水利水电大学 电气工程学院,河南 郑州 450045;
2 郑州博努力计算机科技有限公司,河南 郑州 450001)
 
    摘 要:为了电网的安全运行,应充分考虑气象等相关因素对风电的影响程度来预测短期风电功率。提出采用改进灰色模型 (CGM)、改进粒子群算法 (IPSO) 和最小二乘支持向量机 (LSSVM) 混合的预测方法。CGM-IPSO-LSSVM 方法采用灰色模型的关联性分析不同时刻的气象等相关因素的数据,根据分析所得的气象等相关因素数据来确定风参量的权重,再根据权重运用最小二乘支持向量机对风向量进行估计,并以风向量的估计值为依据,以收敛性更好的改进粒子群算法对 CGM 模型进行优化,求解出最终预测结果,对预测结果出现的误差,采用傅里叶残差序列进行补偿。实验结果表明,提出的 CGM-IPSO-LSSVM 预测方法考虑了多因素影响和克服了参数选择优化的问题,其预测精度在要求的范围内大幅提高,为风电并网的调度提供了有力依据,降低了弃风率。
    关键词: 短期风电功率预测;改进灰色模型;改进粒子群算法;最小二乘支持向量机;融合预测
    中图分类号:TM614 ;TM715     文献标识码:A     文章编号:1007-3175(2023)06-0022-05
 
Short-Term Wind Power Prediction Based on CGM-IPSO-LSSVM
 
KANG Yi1, LUO Li-wei2
(1 School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China;
2 Zhengzhou Bonuli Computer Technology Co., Ltd, Zhengzhou 450001, China)
 
    Abstract: In order to ensure the safe operation of the power grid, the influence of meteorological and other related factors on wind power should be fully considered to predict short-term wind power. Therefore, this paper proposes a hybrid prediction method using improved Cotes Grey Model(CGM), Improved Particle Swarm Optimization(IPSO) and Least Squares Support Vector Machine(LSSVM). The CGMIPSO-LSSVM method first uses the correlation of grey model to analyze the meteorological data and other related factors at different time.Then, according to the above data, the weight of wind parameters is determined. Third, based on the above weight, the least squares support vector machine is used to estimate the wind vector. Fourth, the improved particle swarm optimization with better convergence is adopted to optimize the CGM model to obtain the final prediction result on the basis of estimated values of the wind vector. Finally, the error of the prediction result is compensated by the Fourier residual sequence. The experiment results show that the CGM-IPSO-LSSVM prediction method takes the influence of multiple factors into consideration and overcomes the problem of parameter selection optimization. It not only greatly improves prediction accuracy within the required range to provide strong basis for the scheduling of wind power integration, but also reduces the abandoned wind rate.
    Key words: short-term wind power prediction; improved cotes grey model; improved particle swarm optimization; least squares support vector machine; fusion prediction
 
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