Integrated energy system planning research based on big data load prediction method Yongli Wang, Hekun Shen, Jialin Yang, Nan Wang, Yuze Ma, Pengxiang Zhao, Zhen Li, Xichao Zhou and Suhang Yao E3S Web Conf., 267 (2021) 01005 Published online: 04 June 2021 DOI: 10.1051/e3sconf/202126701005