Analysis and Optimization of Influencing Factors of DC Sheath Induced Voltage of AC/DC Trench Submarine Cable Based on Electrostatic Complementary Model
摘要
Excessive voltage induced on the cable sheath in the AC/DC trench laying submarine cable system may cause sheath breakdown, resulting in paralysis of the submarine cable system and even endangering the safety of personnel. To grasp the law of DC submarine cable induced voltage change effectively, an electrostatic induction complementary model on the basis of the extensive electromagnetic induction model is proposed in the paper, which explores the influencing factors of DC cable sheath sensing voltage and the change map of induced voltage under abnormal working conditions. Taking the 110 kV submarine cable system in a coastal city as an example, the accuracy of the calculation method is verified in the finite element analysis simulation software.