Integrated energy system planning study based on load prediction Jialin Yang, Zhen Li, Nan Wang, Pengxiang Zhao, Xichao Zhou, Lin Cong, Lu Xue and Yongli Wang E3S Web Conf., 245 (2021) 01057 Published online: 24 March 2021 DOI: 10.1051/e3sconf/202124501057