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1.华北电力大学电力工程系,河北省保定市 071003
2.新型电力系统运行与控制全国重点实验室(清华大学),北京市 100084
3.华北电力大学动力工程系,河北省保定市 071003
4.新能源电力系统国家重点实验室(华北电力大学),北京市 102206
5.河北省分布式储能与微网重点实验室(华北电力大学),河北省保定市 071003
王玉庆(1999—),男,博士研究生,主要研究方向:分布式光伏功率预测、需求响应与电力市场。E-mail:wangyuqing@ncepu.edu.cn
徐飞(1974—),男,博士,研究员,主要研究方向:电热综合能源系统动态建模及协调优化运行、需求侧灵活资源调控技术。E-mail:xufei@tsinghua.edu.cn
刘志坚(1984—),男,博士,教授,博士生导师,主要研究方向:分布式能源、零碳建筑、建筑能量管理系统。E-mail:zhijianliu@ncepu.edu.cn
甄钊(1989—),男,通信作者,博士,讲师,主要研究方向:光伏发电功率预测、风电功率预测、电价与电量预测。E-mail:zhenzhao@ncepu.edu.cn
收稿:2023-05-17,
修回:2023-06-29,
网络出版:2023-09-05,
纸质出版:2023-10-25
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王玉庆,徐飞,刘志坚等.基于动态关联表征与图网络建模的分布式光伏超短期功率预测[J].电力系统自动化,2023,47(20):72-82.
WANG Yuqing,XU Fei,LIU Zhijian,et al.Ultra-short-term Power Forecasting of Distributed Photovoltaic Based on Dynamic Correlation Characterization and Graph Network Modeling[J].Automation of Electric Power Systems,2023,47(20):72-82.
王玉庆,徐飞,刘志坚等.基于动态关联表征与图网络建模的分布式光伏超短期功率预测[J].电力系统自动化,2023,47(20):72-82. DOI: 10.7500/AEPS20230517001.
WANG Yuqing,XU Fei,LIU Zhijian,et al.Ultra-short-term Power Forecasting of Distributed Photovoltaic Based on Dynamic Correlation Characterization and Graph Network Modeling[J].Automation of Electric Power Systems,2023,47(20):72-82. DOI: 10.7500/AEPS20230517001.
现有方法忽略了分布式光伏时空关联性的动态变化,难以有效利用时空特征信息提升功率预测精度。考虑到分布式光伏出力的强波动特性与分布式光伏集群强时空关联性,提出一种基于时空关联动态表征与图卷积网络建模的分布式光伏超短期功率预测方法。首先
将各分布式光伏复杂出力序列分解为相对简单、波动较小的多个波动模态分量。然后,考虑到分布式光伏场站间时空关联性动态变化,利用数据驱动方式提取各类波动模态分量表征的各分布式光伏间深层次时空关联关系,并构建由各波动模态分量表征的多个动态时空图结构。在此基础上,建立考虑动态时空关联性的图卷积预测模型,针对不同模态下出力子序列分别预测,而后重构得到各场站功率进而获取区域分布式光伏总功率。最后,基于真实分布式光伏出力数据验证了所提方法的优越性。
Accurate distributed photovoltaic power forecasting provides important support for the safe and stable operation of active distribution networks. However
existing methods neglect the dynamic changes in the spatio-temporal correlations of distributed photovoltaics
making it difficult to effectively utilize spatio-temporal feature information to improve power forecasting accuracy. Considering the strong fluctuation characteristics of distributed photovoltaic output and the strong spatio-temporal correlation of distributed photovoltaic clusters
this paper proposes an ultra-short-term power forecasting method of distributed photovoltaics based on dynamic spatio-temporal correlation characterization and graph convolutional network modeling. First
the complex output sequences of each distributed photovoltaic are decomposed into multiple fluctuation mode components which are relatively simple and have smaller fluctuations. Then
considering the dynamic change of the spatio-temporal correlation between distributed photovoltaic sites
a data-driven method is used to extract the deep spatio-temporal correlation among distributed photovoltaic sites represented by various fluctuation mode components
and multiple dynamic spatio-temporal graph structures represented by each fluctuation mode component are constructed. On this basis
a graph convolutional forecasting model considering the dynamic spatio-temporal correlation is established. The output sub-sequences in different modes are forecasted
respectively
and then the power of each station is reconstructed to obtain the total regional distributed photovoltaic power. Finally
the superiority of the proposed method is verified based on real distributed photovoltaic output data.
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