The study of the electrical properties of nano insulating oil for submarine cables Chen Tian, Zhiping Zhu, Jianping Liao, Zhifeng Liu, Fan Gao, Yufei Chen and Zhenggang Wang E3S Web Conf., 522 (2024) 01019 Published online: 07 May 2024 DOI: 10.1051/e3sconf/202452201019