...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Renewable energy >Clear-sky model for wavelet forecast of direct normal irradiance
【24h】

Clear-sky model for wavelet forecast of direct normal irradiance

机译：用于直接法向辐照度的小波预测的晴空模型

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Direct normal irradiance (DNI) is vital for concentrated solar thermal plants, and its value under clear sky condition is usually used as an important input of some forecasting models for solar irradiance. First of all, a semi-empirical model is developed for calculating the clear-sky DNI, and it is used to transform DNI into clear-sky index to remove the impact of the sun's position on DNI. Then, a wavelet forecasting model, using the clear-sky index as input, is proposed for estimating the inter-hour DNI under any sky conditions. The non-stationary series of the clear-sky index is decomposed by wavelet technology to obtain four sub-series with different frequencies, and forecasting sub-models are constructed according to the features of corresponding sub-series, respectively. Finally, model validation is conducted with data from the open database of the National Renewable Energy Laboratory. The result shows that the performance of the clear-sky model is satisfactory comparing with some other published clear-sky models, and that the wavelet forecasting model achieves great performance with nMAE = 0.84-7.66% and nRMSE = 1.89-10.99% for four different stations and also outperforms other published forecasting models. (C) 2016 Elsevier Ltd. All rights reserved.
机译：直接法向辐照度（DNI）对于集中式太阳能热电厂至关重要，其在晴朗天空条件下的值通常用作某些太阳辐照度预测模型的重要输入。首先，开发了一个半经验模型来计算晴空DNI，并使用该模型将DNI转换为晴空指数，以消除太阳位置对DNI的影响。然后，提出了一种以晴空指数为输入的小波预测模型，用于估计任何天空条件下的小时间DNI。利用小波技术分解晴空指数的非平稳序列，得到四个具有不同频率的子序列，并分别根据相应子序列的特征构建了预测子模型。最后，使用来自国家可再生能源实验室开放数据库的数据进行模型验证。结果表明，与其他已发布的晴空模型相比，晴空模型的性能令人满意，小波预测模型在四种不同情况下的nMAE = 0.84-7.66％和nRMSE = 1.89-10.99％时具有良好的性能。站点，并且优于其他已发布的预测模型。 （C）2016 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Renewable energy》 |2017年第4期|1-8|共8页
  • 作者

    Zhu Tingting; Wei Haikun; Zhao Xin; Zhang Chi; Zhang Kanjian;

  • 作者单位

    Southeast Univ, Sch Automat, Minist Educ, Key Lab Measurement & Control CSE, Nanjing 210096, Jiangsu, Peoples R China;

    Southeast Univ, Sch Automat, Minist Educ, Key Lab Measurement & Control CSE, Nanjing 210096, Jiangsu, Peoples R China;

    Southeast Univ, Sch Automat, Minist Educ, Key Lab Measurement & Control CSE, Nanjing 210096, Jiangsu, Peoples R China;

    Southeast Univ, Sch Automat, Minist Educ, Key Lab Measurement & Control CSE, Nanjing 210096, Jiangsu, Peoples R China;

    Southeast Univ, Sch Automat, Minist Educ, Key Lab Measurement & Control CSE, Nanjing 210096, Jiangsu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    DNI forecast; Clear-sky model; Wavelet forecasting model; Clear-sky index;

    机译：DNI预测;晴空模型;小波预测模型;晴空指数;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号