Research on power-frequency overvoltages of 220 kV offshore cable transmission system in Liaoning Province
Conference: EMIE 2022 - The 2nd International Conference on Electronic Materials and Information Engineering
04/15/2022 - 04/17/2022 at Hangzhou, China
Proceedings: EMIE 2022
Pages: 5Language: englishTyp: PDF
Authors:
Duan, Wei; Pu, Lu; Zao, Xuefeng; Ju, Zeli (Electric Power Research Institute of State Grid Shaanxi Electric Power Company, Xi’an, Shaanxi, China)
Li, Han; Yu, Peixin (State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, Shaanxi, China)
Kong, Minru (State Grid Xi’an Electric Power Supply Company, Xi’an, Shaanxi, China)
Abstract:
Since the power-frequency overvoltages can have a great impact on the safe operation of the submarine cable transmission system, it is necessary to calculate the overvoltages that may occur under actual situations. In this study, PSCAD (EMTDC) is used to calculate the power-frequency overvoltages of the submarine cable transmission system of the offshore oil-gas field group located near Liaoning Province. Under the conditions considered in this study, the maximum power-frequency overvoltage occurs in the case of single-phase fault earthing at the submarine cable joint in L4, which is 1.134 p.u. The result meets the limit of relevant regulations for the 220 kV transmission system, indicating that the submarine cable transmission system can operate safely and effectively, which can provide important guiding significance for the construction and operation of the system.