摘要
为了提高光伏发电功率预测精度,建立了基于ICEEMDAN-DTW和ISMA-WLSSVM的光伏发电功率超短期组合预测模型。首先,根据Pearson相关性分析,确定光辐照度、环境温度以及湿度为光伏发电功率的关键气象影响因素,继而使用改进的自适应白噪声完备集成经验模态分解(Improved Complete Ensemble Empirical Mode Decomposition with Adaptive Noise, ICEEMDAN)对历史光伏功率和气象因素进行分解,降低其复杂度和随机波动性,并利用动态时间弯曲(Dynamic Time Warping, DTW)算法确定每个光伏功率子序列的输入特征向量。其次,对最小二乘支持向量机(Least Squares Support Vector Machine, LSSVM)在建模过程中的误差进行权重分配,得到加权最小二乘支持向量机(Weighted Least Squares Support Vector Machine, WLSSVM),其解决了LSSVM模型鲁棒性低的缺陷。最后,通过改进黏菌算法(Improve Slime Mould Algorithm, ISMA)对WLSSVM进行参数优化,搭建ISMA-WLSSVM预测模型,并在多种不同天气类型下进行光伏发电功率预测仿真实验。实验证明:相比EOSSA-ELM预测模型,该模型的RMSE在晴天、多云和雨天分别降低了57.4%、57.5%和52.5%。
In order to improve the prediction accuracy of photovoltaic power generation,an ultra-short-term combined prediction model of photovoltaic power generation based on ICEEMDAN-DTW and ISMA-WLSSVM was proposed.Firstly,according to Pearson correlation analysis,light irradiance,ambient tem-perature and humidity were determined to be the key meteorological factors affecting photovoltaic power generation,then,an improved complete ensemble empirical mode decomposition with adaptive noise(ICEEMDAN)was used to decompose the historical PV power and meteorological factors and reduce their complexity and random volatility,and the dynamic time warping(DTW)algorithm was used to determine the input eigenvectors of each PV power subsequence.Secondly,the weighted least squares support vector machine(WLSSVM)was obtained by assigning weights to the errors in the modeling process of least squares support vector machine(LSSVM),which solved the defect of low robustness of LSSVM model.Finally,the parameters of WLSSVM were optimized through the improved slime mould algorithm(ISMA),the ISMA-WLSSVM prediction model was built,and the photovoltaic power generation prediction simulation experiment was conducted under various weather types.Experimental results show that compared with the EOSSA-ELM prediction model,this model reduces RMSE by 57.4%,57.5% and 52.5% on sunny,cloudy and rainy days,respectively.
作者
王瑞
王英洲
逯静
WANG Rui;WANG Ying-zhou;LU Jing(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo,China,454000;School of Computer Science and Technology,Henan Polytechnic University,Jiaozuo,China,454000)
出处
《热能动力工程》
CAS
CSCD
北大核心
2023年第9期131-140,共10页
Journal of Engineering for Thermal Energy and Power
基金
国家自然科学基金(62273133)
河南省科技攻关项目(222102210120)。
关键词
光伏功率预测
动态时间弯曲算法
黏菌算法
加权最小二乘支持向量机
ICEEMDAN
photovoltaic power prediction
dynamic time warping(DTW)algorithm
slime mould algo-rithm
weighted least squares support vector machine(WLSSVM)
ICEEMDAN
