110 kV电缆接头接地线带电修复装置研究

Research on Repair with Electricity Technology of 110 kV Cable Joint Ground Wires

摘要: 近年来，国内多地出现电缆接头接地线被盗事件，造成了电缆接头损坏、外护套烧毁及人员伤亡的严重事故。停电修复时，进一步造成了二次经济损失。针对这一问题，本文建立了110 kV电力电缆接头接地线被盗后，金属护套悬浮电位ATP-EMTP仿真模型，计算了不同被盗情况下的悬浮电位值。研制了电缆接头接地线带电修复装置，包括接地穿刺装置、接合灭弧装置和高压测量装置，并开展了相关模拟实验研究，验证了该装置在电缆接头接地线带电修复中的有效性。

Abstract: In recent years, cable joint grounding wires were stolen in many parts of China, resulting in cable joint damage, external jacket burned and serious casualties. What’s more, further economic losses will be caused due to power cut during repair. To solve this problem, this paper establishes COMSOL and ATP-EMTP simulation model for metal sheath suspension potential calculation of 110 kV power cable when the joint grounding wire is stolen, and floating potentials are calculated under different accidents conditions. Based on the simulation results, a temporary grounding system in repair with electricity is developed, including the grounding joint puncture device, arc extinguishing device and pressure measuring device. Some experiments are carried out to verify the validity of the temporary grounding system in repair with electricity.